Market Data
Grouped by Kin Score band and ranked by composite score within each, with the separate agent-readiness score alongside. Click the scores on any row to open the full facet and dimension breakdown behind both numbers, and click again to close it.
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58 providers
Exemplar 4 66.5+ Reference-quality API operations across every facet.
1
Twelve Data Exemplar agent ready Developer-First
Twelve Data is a financial market data provider offering real-time and historical data for stocks, forex, cryptocurrencies, ETFs, indices, commodities, and f...
Composite
73.3
Agent
58.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 73.3/100 · exemplar
Contract Quality
15.6 / 25
Developer Ergonomics
16.3 / 20
Access Clarity
20.0 / 20
Operational Transparency
8.9 / 13
Contract Governance
1.9 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
9.0 / 15
Agent readiness — 58/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility documented
2.4 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
2
Polygon Exemplar agent native Developer-First
Polygon (Polygon.io, rebranded as Massive in early 2026) provides real-time and historical market data APIs across US stocks, options, indices, forex, crypto...
Composite
68.3
Agent
63.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 68.3/100 · exemplar
Contract Quality
18.1 / 25
Developer Ergonomics
10.6 / 20
Access Clarity
15.5 / 20
Operational Transparency
7.5 / 13
Contract Governance
4.0 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
10.2 / 15
Agent readiness — 63/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
3
Factset Exemplar agent ready Enterprise Platform
FactSet creates flexible, open data and software solutions for tens of thousands of investment professionals around the world, providing instant access to fi...
Composite
67.7
Agent
52.8
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 67.7/100 · exemplar
Contract Quality
17.1 / 25
Developer Ergonomics
16.8 / 20
Access Clarity
10.0 / 20
Operational Transparency
3.8 / 13
Contract Governance
4.0 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
10.2 / 15
Agent readiness — 53/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility documented
2.4 / 6
MCP Server documented
4.8 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling
7.0 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
4
Financial Modeling Prep Exemplar agent ready Developer-First
Financial Modeling Prep (FMP) provides financial market data via REST APIs, including real-time and historical stock quotes, company fundamentals, income sta...
Composite
66.6
Agent
38.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 66.6/100 · exemplar
Contract Quality
14.1 / 25
Developer Ergonomics
9.6 / 20
Access Clarity
20.0 / 20
Operational Transparency
9.6 / 13
Contract Governance
1.9 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
9.0 / 15
Agent readiness — 38/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
Strong 16 54.3 – 66.4 Solid contracts, transparent operations, and an easy start.
5
S&P Global Strong agent ready Enterprise Platform
S&P Global (NYSE SPGI) is the parent of S&P Global Ratings, S&P Global Market Intelligence, S&P Dow Jones Indices, S&P Global Commodity Insights (Platts), S&...
Composite
65.7
Agent
63.7
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 65.7/100 · strong
Contract Quality
17.5 / 25
Developer Ergonomics
17.9 / 20
Access Clarity
13.4 / 20
Operational Transparency
4.8 / 13
Contract Governance
5.6 / 12
Discoverability
7.2 / 10
Agent readiness — 64/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
6
Market Data Strong agent ready Developer-First
Market Data (marketdata.app) is a financial market data provider offering a REST API for real-time and historical U.S. stock, options, and index data. The AP...
Composite
65.0
Agent
30.2
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 65.0/100 · strong
Contract Quality
13.2 / 25
Developer Ergonomics
15.1 / 20
Access Clarity
16.8 / 20
Operational Transparency
9.2 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 30/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
7
Dow Jones Strong agent ready Enterprise Platform
Dow Jones is a financial news and information company, publisher of The Wall Street Journal, Barron's, MarketWatch, and Dow Jones Newswires, and operator of ...
Composite
64.6
Agent
48.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 64.6/100 · strong
Contract Quality
15.8 / 25
Developer Ergonomics
13.7 / 20
Access Clarity
7.9 / 20
Operational Transparency
9.9 / 13
Contract Governance
2.2 / 12
Discoverability
6.3 / 10
Regulatory · Securities & Market Data
12.0 / 15
Agent readiness — 48/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling
7.0 / 7
Typed Event Surface
6 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
8
ThetaData Strong agent ready Developer-First
ThetaData is a developer-first US market data vendor founded in 2022 by Bailey Danseglio, selling real-time and historical options, stocks, indices, and inte...
Composite
62.4
Agent
32.3
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 62.4/100 · strong
Contract Quality
13.1 / 25
Developer Ergonomics
13.9 / 20
Access Clarity
15.3 / 20
Operational Transparency
10.3 / 13
Contract Governance
0.5 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 32/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
9
EODHD Strong agent native Developer-First
Access historical end-of-day stock prices, intraday data, US stock options, and real-time prices with free and advanced plans. EODHD provides financial data ...
Composite
61.8
Agent
66.3
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 61.8/100 · strong
Contract Quality
15.4 / 25
Developer Ergonomics
16.7 / 20
Access Clarity
12.1 / 20
Operational Transparency
3.4 / 13
Contract Governance
1.7 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
10.2 / 15
Agent readiness — 66/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
10
StockData Strong agent ready Developer-First
StockData.org provides real-time, intraday, and historical stock, forex, and cryptocurrency data along with global financial news and sentiment analysis. The...
Composite
60.6
Agent
28.7
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 60.6/100 · strong
Contract Quality
16.2 / 25
Developer Ergonomics
11.5 / 20
Access Clarity
15.5 / 20
Operational Transparency
4.1 / 13
Contract Governance
4.0 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 29/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples documented
1.8 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
11
Barchart Strong agent ready Developer-First
Barchart is a leading provider of market data and commodity data, delivering real-time, delayed, and historical financial and reference data across equities,...
Composite
60.2
Agent
33.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 60.2/100 · strong
Contract Quality
13.6 / 25
Developer Ergonomics
13.5 / 20
Access Clarity
16.8 / 20
Operational Transparency
6.5 / 13
Contract Governance
0.5 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 33/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
12
Alpaca Strong agent native Developer-First
Alpaca is an API-first commission-free stock and crypto trading broker offering trading, market data, options, and broker-as-a-service APIs. Alpaca publishes...
Composite
59.7
Agent
53.0
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 59.7/100 · strong
Contract Quality
16.4 / 25
Developer Ergonomics
10.7 / 20
Access Clarity
6.8 / 20
Operational Transparency
8.2 / 13
Contract Governance
3.8 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
11.0 / 15
Agent readiness — 53/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility documented
2.4 / 6
MCP Server documented
4.8 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency documented
4.5 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
13
Bloomberg Strong agent ready Enterprise Platform
Bloomberg delivers business and markets news, data, analysis, and video to the world, featuring stories from Businessweek and Bloomberg News. Bloomberg provi...
Composite
59.0
Agent
32.9
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 59.0/100 · strong
Contract Quality
16.6 / 25
Developer Ergonomics
13.5 / 20
Access Clarity
6.8 / 20
Operational Transparency
4.8 / 13
Contract Governance
5.6 / 12
Discoverability
5.9 / 10
Regulatory · Securities & Market Data
11.7 / 15
Agent readiness — 33/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
14
Tradier Strong agent ready Developer-First
Tradier is a brokerage platform offering REST and WebSocket APIs for trading US equities, options, and futures, plus market data and account-opening services...
Composite
56.6
Agent
45.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 56.6/100 · strong
Contract Quality
14.7 / 25
Developer Ergonomics
10.4 / 20
Access Clarity
9.5 / 20
Operational Transparency
6.8 / 13
Contract Governance
1.9 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
11.7 / 15
Agent readiness — 45/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility documented
2.4 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata documented
2.5 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
15
Intrinio Strong agent ready Developer-First
Intrinio is a financial data platform delivering real-time, delayed, and historical US stock prices, options data with Greeks and implied volatility, standar...
Composite
56.0
Agent
46.8
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 56.0/100 · strong
Contract Quality
10.4 / 25
Developer Ergonomics
11.0 / 20
Access Clarity
12.6 / 20
Operational Transparency
6.5 / 13
Contract Governance
2.2 / 12
Discoverability
8.3 / 10
Regulatory · Securities & Market Data
10.2 / 15
Agent readiness — 47/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
16
Kaiko Strong agent aware Crypto Market Data
Kaiko is an institutional-grade crypto market data provider. Its product line spans Kaiko REST (historical and reference data), Kaiko Stream (real-time WebSo...
Composite
55.8
Agent
27.3
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 55.8/100 · strong
Contract Quality
13.6 / 25
Developer Ergonomics
13.5 / 20
Access Clarity
12.1 / 20
Operational Transparency
4.1 / 13
Contract Governance
2.2 / 12
Discoverability
6.7 / 10
Regulatory · Securities & Market Data
9.0 / 15
Agent readiness — 27/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
17
DTN Strong agent ready Feed & Infrastructure
DTN is an operational intelligence company delivering weather, agriculture, energy, and commodity market data through a catalog of 36 published APIs on its d...
Composite
55.7
Agent
34.6
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 55.7/100 · strong
Contract Quality
16.2 / 25
Developer Ergonomics
13.7 / 20
Access Clarity
6.8 / 20
Operational Transparency
4.8 / 13
Contract Governance
1.7 / 12
Discoverability
7.6 / 10
Regulatory · Energy & Utilities
8.5 / 15
Agent readiness — 35/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility documented
2.4 / 6
MCP Server
0 / 12
Machine-Readable Auth negotiable
7.5 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
18
Marketstack Strong agent ready Developer-First
Marketstack is a real-time, intraday, and historical stock market data API from APILayer, delivering JSON data for tickers across 70+ global stock exchanges....
Composite
55.6
Agent
29.2
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 55.6/100 · strong
Contract Quality
11.6 / 25
Developer Ergonomics
12.0 / 20
Access Clarity
15.3 / 20
Operational Transparency
6.2 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 29/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
6 / 6
MCP Server documented
4.8 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
19
Moody's Strong agent ready Enterprise Platform
Moody's provides a comprehensive suite of APIs spanning KYC compliance, economic data and forecasting, credit risk analytics, insurance and catastrophe model...
Composite
55.3
Agent
38.2
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 55.3/100 · strong
Contract Quality
13.2 / 25
Developer Ergonomics
15.4 / 20
Access Clarity
6.8 / 20
Operational Transparency
4.4 / 13
Contract Governance
2.2 / 12
Discoverability
7.4 / 10
Regulatory · Insurance
10.7 / 15
Agent readiness — 38/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility documented
2.4 / 6
MCP Server
0 / 12
Machine-Readable Auth negotiable
7.5 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
6 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
20
Amberdata Strong agent ready Crypto Market Data
Amberdata delivers institutional-grade digital asset and blockchain data through its REST API at https://api.amberdata.com. Coverage spans spot market data (...
Composite
54.4
Agent
38.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 54.4/100 · strong
Contract Quality
15.4 / 25
Developer Ergonomics
5.8 / 20
Access Clarity
12.1 / 20
Operational Transparency
8.6 / 13
Contract Governance
1.9 / 12
Discoverability
8.2 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 38/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server documented
4.8 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
Developing 21 39.3 – 54.2 Real signal across most facets with visible, nameable gaps.
21
SIX Developing agent ready Exchange Data Arm
SIX operates the financial market infrastructure of Switzerland and Spain, including SIX Swiss Exchange, BME, and Swiss interbank clearing and securities ser...
Composite
54.1
Agent
44.0
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 54.1/100 · developing
Contract Quality
15.0 / 25
Developer Ergonomics
14.2 / 20
Access Clarity
6.8 / 20
Operational Transparency
5.8 / 13
Contract Governance
2.2 / 12
Discoverability
7.2 / 10
Regulatory · Banking & Open Finance
8.4 / 15
Agent readiness — 44/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility documented
2.4 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling
7.0 / 7
Typed Event Surface
6 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
22
JPX (Japan Exchange Group) Developing agent aware Exchange Data Arm
JPX (Japan Exchange Group) operates the Tokyo Stock Exchange, Osaka Exchange, and Tokyo Commodity Exchange, and sells Japanese market data through its JPX Ma...
Composite
53.4
Agent
15.0
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 53.4/100 · developing
Contract Quality
0.0 / 25
Developer Ergonomics
15.7 / 20
Access Clarity
15.3 / 20
Operational Transparency
9.6 / 13
Contract Governance
2.2 / 12
Discoverability
8.2 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 15/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server documented
4.8 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
23
Alpha Vantage Developing agent native Developer-First
Alpha Vantage provides a single REST market-data API at https://www.alphavantage.co/query exposing 100+ functions across stocks (intraday/daily/weekly/monthl...
Composite
52.7
Agent
55.9
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 52.7/100 · developing
Contract Quality
8.3 / 25
Developer Ergonomics
14.4 / 20
Access Clarity
12.1 / 20
Operational Transparency
1.4 / 13
Contract Governance
4.0 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
10.2 / 15
Agent readiness — 56/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server documented
4.8 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
24
Benzinga Developing agent aware Developer-First
Benzinga is a Detroit-based financial media and market data company (founded 2010, acquired by Beringer Capital in 2021) that licenses its newsroom and data ...
Composite
52.5
Agent
25.7
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 52.5/100 · developing
Contract Quality
14.6 / 25
Developer Ergonomics
13.2 / 20
Access Clarity
6.8 / 20
Operational Transparency
6.8 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 26/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
25
CryptoCompare Developing agent native Crypto Market Data
CryptoCompare (now CoinDesk Data / CCData, acquired by CoinDesk in late 2024) is a long-standing crypto market data aggregator covering 300+ exchanges, 10,00...
Composite
52.2
Agent
60.2
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 52.2/100 · developing
Contract Quality
18.6 / 25
Developer Ergonomics
5.1 / 20
Access Clarity
10.5 / 20
Operational Transparency
6.5 / 13
Contract Governance
4.0 / 12
Discoverability
7.0 / 10
Regulatory · Securities & Market Data
5.7 / 15
Agent readiness — 60/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
26
Deutsche Börse Developing agent aware Exchange Data Arm
Deutsche Börse AG is the Frankfurt-based, publicly listed (FWB DB1) exchange organization behind the Frankfurt Stock Exchange and Xetra cash market, the Eure...
Composite
52.1
Agent
25.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 52.1/100 · developing
Contract Quality
15.4 / 25
Developer Ergonomics
13.2 / 20
Access Clarity
6.8 / 20
Operational Transparency
5.8 / 13
Contract Governance
0.5 / 12
Discoverability
7.4 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 25/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
27
Cboe Global Markets Developing agent aware Exchange Data Arm
Cboe Global Markets is one of the world's largest exchange holding companies, operating options, futures, equities, and FX markets including the Cboe Options...
Composite
52.0
Agent
17.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 52.0/100 · developing
Contract Quality
1.7 / 25
Developer Ergonomics
12.9 / 20
Access Clarity
15.3 / 20
Operational Transparency
8.2 / 13
Contract Governance
2.2 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
10.2 / 15
Agent readiness — 17/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples documented
1.8 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
28
Databento Developing agent ready Feed & Infrastructure
Databento is a market data platform that delivers historical and live financial market data through a single, normalized API. It covers equities, futures, op...
Composite
51.7
Agent
36.2
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 51.7/100 · developing
Contract Quality
11.0 / 25
Developer Ergonomics
13.0 / 20
Access Clarity
7.9 / 20
Operational Transparency
10.3 / 13
Contract Governance
0.5 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
8.3 / 15
Agent readiness — 36/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6.0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
29
London Stock Exchange Group Developing agent aware Enterprise Platform
London Stock Exchange Group plc is a United Kingdom-based stock exchange and financial information company headquartered in the City of London, England. LSEG...
Composite
50.1
Agent
28.2
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 50.1/100 · developing
Contract Quality
12.7 / 25
Developer Ergonomics
14.6 / 20
Access Clarity
10.0 / 20
Operational Transparency
1.4 / 13
Contract Governance
0.5 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility documented
2.4 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
30
Morningstar Developing agent ready Enterprise Platform
Morningstar, Inc. (Nasdaq MORN) is a Chicago-based investment research and financial market data company selling fund and equity data, analyst research, rati...
Composite
47.8
Agent
56.8
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 47.8/100 · developing
Contract Quality
14.2 / 25
Developer Ergonomics
14.8 / 20
Access Clarity
2.1 / 20
Operational Transparency
3.8 / 13
Contract Governance
0.5 / 12
Discoverability
6.5 / 10
Regulatory · Securities & Market Data
9.3 / 15
Agent readiness — 57/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
12.0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
31
Intercontinental Exchange Developing agent aware Exchange Data Arm
Intercontinental Exchange (ICE) operates global exchanges, clearing houses, and data services for financial and commodity markets, including the New York Sto...
Composite
46.3
Agent
24.0
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 46.3/100 · developing
Contract Quality
12.4 / 25
Developer Ergonomics
9.6 / 20
Access Clarity
10.0 / 20
Operational Transparency
3.1 / 13
Contract Governance
0.5 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
9.0 / 15
Agent readiness — 24/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
32
CME Group Developing agent aware Exchange Data Arm
CME Group is the world's largest derivatives exchange and operator of the CME, CBOT, NYMEX, and COMEX markets, offering futures and options across interest r...
Composite
46.2
Agent
20.5
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 46.2/100 · developing
Contract Quality
0.0 / 25
Developer Ergonomics
14.3 / 20
Access Clarity
10.0 / 20
Operational Transparency
4.8 / 13
Contract Governance
2.2 / 12
Discoverability
6.5 / 10
Regulatory · Securities & Market Data
13.8 / 15
Agent readiness — 21/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
33
Finage Developing agent ready Developer-First
Finage is a London-based real-time and historical market data provider covering US and global stocks, forex, cryptocurrencies, CFD indices, ETFs, bonds, and ...
Composite
45.8
Agent
32.3
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 45.8/100 · developing
Contract Quality
6.1 / 25
Developer Ergonomics
9.4 / 20
Access Clarity
15.3 / 20
Operational Transparency
4.4 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 32/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
7.0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
34
Tiingo Developing agent aware Developer-First
Tiingo provides high-quality financial market data APIs across US equities, crypto, FX, fundamentals, and news, popular among quantitative researchers. APIs ...
Composite
45.0
Agent
28.5
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 45.0/100 · developing
Contract Quality
5.1 / 25
Developer Ergonomics
13.5 / 20
Access Clarity
12.1 / 20
Operational Transparency
4.4 / 13
Contract Governance
0.5 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 29/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
35
dxFeed Developing agent aware Feed & Infrastructure
dxFeed is a market data distributor and subsidiary of Devexperts, headquartered in Munich, delivering real-time, delayed, historical, and on-demand financial...
Composite
44.4
Agent
27.5
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 44.4/100 · developing
Contract Quality
12.6 / 25
Developer Ergonomics
14.6 / 20
Access Clarity
7.4 / 20
Operational Transparency
0.3 / 13
Contract Governance
0.5 / 12
Discoverability
5.9 / 10
Regulatory · Securities & Market Data
9.0 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
36
MarketAux Developing agent aware Developer-First
Marketaux is a global financial and stock market news API that pairs every article with entity recognition and sentiment analysis. It aggregates 5,000+ news ...
Composite
43.6
Agent
28.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 43.6/100 · developing
Contract Quality
4.3 / 25
Developer Ergonomics
9.4 / 20
Access Clarity
15.3 / 20
Operational Transparency
4.1 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples partial
3.5 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
37
Finnhub Developing agent aware Developer-First
With the sole mission of democratizing financial data, we are proud to offer a FREE realtime API for stocks, forex and cryptocurrency. With this API, you can...
Composite
43.5
Agent
24.6
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 43.5/100 · developing
Contract Quality
13.9 / 25
Developer Ergonomics
8.7 / 20
Access Clarity
10.0 / 20
Operational Transparency
1.4 / 13
Contract Governance
1.9 / 12
Discoverability
6.9 / 10
Regulatory · Securities & Market Data
6.8 / 15
Agent readiness — 25/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
38
Coin Metrics Developing agent aware Crypto Market Data
Coin Metrics is a Boston-based crypto financial intelligence provider founded in 2017, selling institutional-grade cryptoasset network (on-chain) data, excha...
Composite
42.9
Agent
24.6
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 42.9/100 · developing
Contract Quality
15.7 / 25
Developer Ergonomics
13.2 / 20
Access Clarity
0.0 / 20
Operational Transparency
7.5 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
4.2 / 15
Agent readiness — 25/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface derived
1.5 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
39
AlgoSeek Developing agent aware Developer-First
AlgoSeek, LLC is a New York-based financial market data vendor (spun off from a trading fund) selling historical intraday US market data - equities, ETFs, eq...
Composite
42.7
Agent
22.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 42.7/100 · developing
Contract Quality
14.5 / 25
Developer Ergonomics
13.2 / 20
Access Clarity
4.2 / 20
Operational Transparency
2.4 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
6.3 / 15
Agent readiness — 22/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics
8.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
40
B3 (Brasil Bolsa Balcão) Developing agent aware Exchange Data Arm
B3 S.A. - Brasil, Bolsa, Balcão is the Brazilian exchange and financial market infrastructure operator formed by the 2017 merger of BM&FBOVESPA and Cetip, ru...
Composite
42.0
Agent
19.2
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 42.0/100 · developing
Contract Quality
6.7 / 25
Developer Ergonomics
12.7 / 20
Access Clarity
5.5 / 20
Operational Transparency
3.4 / 13
Contract Governance
2.2 / 12
Discoverability
6.5 / 10
Regulatory · Securities & Market Data
10.2 / 15
Agent readiness — 19/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
41
TMX Group Developing agent aware Exchange Data Arm
TMX Group operates Canadian capital-markets infrastructure - Toronto Stock Exchange, TSX Venture Exchange, TSX Alpha, and the Montreal Exchange - and sells m...
Composite
39.8
Agent
7.9
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 39.8/100 · developing
Contract Quality
0.0 / 25
Developer Ergonomics
9.8 / 20
Access Clarity
12.6 / 20
Operational Transparency
5.0 / 13
Contract Governance
0.5 / 12
Discoverability
7.4 / 10
Regulatory · Securities & Market Data
9.8 / 15
Agent readiness — 8/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
Thin 9 26.2 – 39.2 Limited machine-readable signal beyond documentation a human can read.
42
Xignite Thin agent aware Feed & Infrastructure
Xignite pioneered cloud-based financial market data APIs, offering a catalog of 40+ REST web services covering equities, forex, crypto, indices, options, fut...
Composite
39.0
Agent
24.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 39.0/100 · thin
Contract Quality
9.8 / 25
Developer Ergonomics
13.2 / 20
Access Clarity
6.8 / 20
Operational Transparency
0.3 / 13
Contract Governance
0.5 / 12
Discoverability
7.2 / 10
Regulatory · Securities & Market Data
6.3 / 15
Agent readiness — 24/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
6 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
9 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
4 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
43
Nasdaq Data Link Thin agent aware Exchange Data Arm
Nasdaq Data Link (formerly Quandl) is Nasdaq's financial, economic, and alternative data platform, offering hundreds of free and premium datasets from publis...
Composite
38.6
Agent
27.6
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 38.6/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
13.6 / 20
Access Clarity
4.5 / 20
Operational Transparency
6.5 / 13
Contract Governance
2.2 / 12
Discoverability
8.9 / 10
Regulatory · Securities & Market Data
8.3 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server documented
4.8 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
5.0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
44
OneTick (OneMarketData) Thin agent aware Feed & Infrastructure
OneTick, from OneMarketData, is an enterprise tick database and analytics platform for capital markets, capturing, storing, and analyzing trade, quote, and o...
Composite
36.0
Agent
15.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 36.0/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
11.0 / 20
Access Clarity
6.8 / 20
Operational Transparency
4.4 / 13
Contract Governance
2.2 / 12
Discoverability
8.2 / 10
Regulatory · Securities & Market Data
8.7 / 15
Agent readiness — 15/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
45
QUODD Thin agent aware Feed & Infrastructure
QUODD is a cloud-native market data provider delivering real-time, delayed, historical, end-of-day, and point-in-time pricing, plus reference data, a securit...
Composite
33.4
Agent
23.6
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 33.4/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
9.4 / 20
Access Clarity
10.0 / 20
Operational Transparency
4.1 / 13
Contract Governance
0.5 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
7.8 / 15
Agent readiness — 24/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract derived
2.5 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills derived
1.3 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
46
HKEX Thin agent aware Exchange Data Arm
HKEX (Hong Kong Exchanges and Clearing Limited, SEHK 388) operates the Stock Exchange of Hong Kong, the Hong Kong Futures Exchange, and their clearing houses...
Composite
32.3
Agent
7.9
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 32.3/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
9.0 / 20
Access Clarity
6.3 / 20
Operational Transparency
4.8 / 13
Contract Governance
2.2 / 12
Discoverability
6.5 / 10
Regulatory · Securities & Market Data
8.7 / 15
Agent readiness — 8/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
47
BMLL Technologies Thin agent aware Feed & Infrastructure
BMLL is a London-based provider of harmonised historical Level 3, 2, and 1 order book data and analytics for capital markets, covering global equities, ETFs,...
Composite
30.5
Agent
5.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 30.5/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
10.5 / 20
Access Clarity
5.8 / 20
Operational Transparency
2.4 / 13
Contract Governance
2.2 / 12
Discoverability
7.4 / 10
Regulatory · Securities & Market Data
7.5 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
48
Options Technology Thin agent aware Feed & Infrastructure
Options Technology (Options IT) is a capital markets managed services and trading infrastructure provider founded in 1993, backed by private equity firm Abry...
Composite
30.5
Agent
5.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 30.5/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
14.3 / 20
Access Clarity
5.3 / 20
Operational Transparency
3.4 / 13
Contract Governance
0.0 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
5.3 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
49
Euronext Thin agent aware Exchange Data Arm
Euronext N.V. is the leading pan-European exchange operator, running regulated cash and derivatives markets in Amsterdam, Brussels, Dublin, Lisbon, Milan, Os...
Composite
29.9
Agent
5.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 29.9/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
12.9 / 20
Access Clarity
4.2 / 20
Operational Transparency
2.4 / 13
Contract Governance
2.2 / 12
Discoverability
7.2 / 10
Regulatory · Securities & Market Data
6.3 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
50
Exchange Data International Thin agent aware Feed & Infrastructure
Exchange Data International (EDI) is an independent, privately held financial data vendor founded in 1994 by Jonathan Bloch and headquartered in London, with...
Composite
27.0
Agent
5.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 27.0/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
10.5 / 20
Access Clarity
6.8 / 20
Operational Transparency
0.0 / 13
Contract Governance
0.5 / 12
Discoverability
8.2 / 10
Regulatory · Securities & Market Data
6.3 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
Emerging 6 11 – 26.1 More than an index entry but still mostly links rather than artifacts.
51
Pico Emerging agent aware Feed & Infrastructure
Pico (pico.net) is a trading-infrastructure and financial market data company - not the creator-CRM company of the same name - providing global exchange conn...
Composite
25.6
Agent
10.8
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 25.6/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
7.6 / 20
Access Clarity
4.2 / 20
Operational Transparency
2.4 / 13
Contract Governance
2.2 / 12
Discoverability
5.7 / 10
Regulatory · Securities & Market Data
8.7 / 15
Agent readiness — 11/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
52
ACTIV Financial Systems Emerging agent aware Feed & Infrastructure
ACTIV Financial Systems is a provider of real-time and historical financial market data, best known for the ACTIV Feed consolidated multi-asset market data f...
Composite
24.1
Agent
5.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 24.1/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
14.3 / 20
Access Clarity
2.1 / 20
Operational Transparency
1.4 / 13
Contract Governance
0.0 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
4.0 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
53
IEX Cloud Emerging human only Developer-First
IEX Cloud was a cloud-based financial data platform from IEX Group offering market data, fundamentals, news, options, and reference APIs at https://cloud.iex...
Composite
24.1
Agent
5.0
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 24.1/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
7.6 / 20
Access Clarity
3.2 / 20
Operational Transparency
6.5 / 13
Contract Governance
0.0 / 12
Discoverability
7.6 / 10
Regulatory · Securities & Market Data
4.5 / 15
Agent readiness — 5/100 · human only
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling documented
3.5 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
54
QuoteMedia Emerging agent aware Feed & Infrastructure
QuoteMedia, Inc. is an independent, publicly traded (OTC QMCI) financial market data and financial technology company headquartered in Fountain Hills, Arizon...
Composite
22.0
Agent
5.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 22.0/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
8.8 / 20
Access Clarity
4.2 / 20
Operational Transparency
2.1 / 13
Contract Governance
0.0 / 12
Discoverability
7.2 / 10
Regulatory · Securities & Market Data
5.0 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
55
MSCI Emerging agent aware Enterprise Platform
MSCI is a leading provider of critical decision support tools and services for the global investment community, publishing indexes, ESG and climate ratings, ...
Composite
20.6
Agent
15.1
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 20.6/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
4.8 / 20
Access Clarity
5.5 / 20
Operational Transparency
0.0 / 13
Contract Governance
2.2 / 12
Discoverability
8.2 / 10
Agent readiness — 15/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth served
9.0 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
6.0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
6 / 6
Agentic Commerce Well-Known Document
0 / 5
56
big xyt Emerging human only Feed & Infrastructure
big xyt AG (now branded simply xyt, with big-xyt.com redirecting to xyt.one) is an independent, majority employee-owned market data analytics firm headquarte...
Composite
17.3
Agent
2.5
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 17.3/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
7.6 / 20
Access Clarity
3.4 / 20
Operational Transparency
0.3 / 13
Contract Governance
0.0 / 12
Discoverability
7.2 / 10
Regulatory · Securities & Market Data
4.0 / 15
Agent readiness — 3/100 · human only
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
Minimal 2 0 – 10.9 Index entry only; little beyond a description and a link.
57
MayStreet Minimal agent aware Feed & Infrastructure
MayStreet is a low-latency market data infrastructure vendor founded in 2012 and acquired by London Stock Exchange Group (LSEG) in May 2022, with maystreet.c...
Composite
9.7
Agent
5.4
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 9.7/100 · minimal
Contract Quality
0.0 / 25
Developer Ergonomics
5.7 / 20
Access Clarity
0.0 / 20
Operational Transparency
0.3 / 13
Contract Governance
0.0 / 12
Discoverability
5.9 / 10
Regulatory · Securities & Market Data
3.0 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth bearer
3.5 / 10
Idempotency
0 / 9
Stable Error Semantics documented
4.0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5
58
Exegy Minimal human only Feed & Infrastructure
Exegy is a St. Louis-based provider of low-latency market data infrastructure, trading platforms, and predictive trading signals for capital markets, backed ...
Composite
8.7
Agent
0.0
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
Composite quality — 8.7/100 · minimal
Contract Quality
0.0 / 25
Developer Ergonomics
3.3 / 20
Access Clarity
2.1 / 20
Operational Transparency
0.3 / 13
Contract Governance
0.0 / 12
Discoverability
5.7 / 10
Regulatory · Securities & Market Data
2.5 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 10
Documented Reversibility
0 / 6
MCP Server
0 / 12
Machine-Readable Auth
0 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Delegated User Identity
0 / 6
Protected Resource Metadata
0 / 5
Registration Without a Human
0 / 6
Agentic Commerce Well-Known Document
0 / 5