API Evangelist Sector Report
The State of Market Data APIs
Fifty-eight providers scored. The feed is the commodity, the operation is the moat — the resource taxonomy, the Kin Score facet-by-facet, agent-readiness, security posture, provider-by-provider intelligence, and the investable thesis for operators and investors.
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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 10 70+ Reference-quality API operations across every facet.
1
Alpaca Exemplar 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
86.4
Agent
90.4
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 86.4/100 · exemplar
Contract Quality
17.3 / 25
Developer Ergonomics
18.3 / 20
Commercial Clarity
20.0 / 20
Operational Transparency
11.3 / 13
Governance
7.3 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
15.0 / 15
Agent readiness — 90/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
9 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
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
79.7
Agent
90.4
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 79.7/100 · exemplar
Contract Quality
19.3 / 25
Developer Ergonomics
17.4 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
8.9 / 13
Governance
7.9 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 90/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
9 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
3
Twelve Data Exemplar agent native 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
77.3
Agent
81.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 77.3/100 · exemplar
Contract Quality
16.1 / 25
Developer Ergonomics
17.4 / 20
Commercial Clarity
20.0 / 20
Operational Transparency
9.6 / 13
Governance
6.3 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
9.8 / 15
Agent readiness — 82/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
4
EODHD Exemplar 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
76.8
Agent
81.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 76.8/100 · exemplar
Contract Quality
17.4 / 25
Developer Ergonomics
17.0 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
6.8 / 13
Governance
8.8 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 82/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
5
Bloomberg Exemplar agent native 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
76.5
Agent
84.6
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 76.5/100 · exemplar
Contract Quality
19.5 / 25
Developer Ergonomics
14.8 / 20
Commercial Clarity
12.6 / 20
Operational Transparency
8.2 / 13
Governance
10.4 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
13.4 / 15
Agent readiness — 85/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
3 / 3
6
Tradier Exemplar agent native 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
76.0
Agent
84.6
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 76.0/100 · exemplar
Contract Quality
14.2 / 25
Developer Ergonomics
16.1 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
10.3 / 13
Governance
6.3 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
13.4 / 15
Agent readiness — 85/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
3 / 3
7
Alpha Vantage Exemplar 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
75.2
Agent
76.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 75.2/100 · exemplar
Contract Quality
17.3 / 25
Developer Ergonomics
16.5 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
4.8 / 13
Governance
10.4 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 76/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
8
Factset Exemplar agent native 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
73.5
Agent
76.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 73.5/100 · exemplar
Contract Quality
16.0 / 25
Developer Ergonomics
17.8 / 20
Commercial Clarity
14.7 / 20
Operational Transparency
4.8 / 13
Governance
10.4 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 76/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
9
CryptoCompare Exemplar 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
71.9
Agent
81.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 71.9/100 · exemplar
Contract Quality
20.1 / 25
Developer Ergonomics
15.7 / 20
Commercial Clarity
14.2 / 20
Operational Transparency
7.9 / 13
Governance
7.9 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 82/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
10
Moody's Exemplar agent native 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
70.0
Agent
81.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 70.0/100 · exemplar
Contract Quality
18.4 / 25
Developer Ergonomics
15.2 / 20
Commercial Clarity
10.0 / 20
Operational Transparency
6.5 / 13
Governance
8.8 / 12
Discoverability
10.0 / 10
Regulatory · Insurance
11.4 / 15
Agent readiness — 82/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
Strong 11 60–69.9 Solid contracts, transparent operations, and an easy start.
11
StockData Strong agent native 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
69.1
Agent
78.8
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 69.1/100 · strong
Contract Quality
16.4 / 25
Developer Ergonomics
13.9 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
4.1 / 13
Governance
10.4 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 79/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
7 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
12
Databento Strong agent native 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
68.7
Agent
72.1
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 68.7/100 · strong
Contract Quality
14.8 / 25
Developer Ergonomics
15.2 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
10.6 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 72/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
13
DTN Strong agent native 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
68.3
Agent
81.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 68.3/100 · strong
Contract Quality
18.9 / 25
Developer Ergonomics
15.7 / 20
Commercial Clarity
10.0 / 20
Operational Transparency
6.8 / 13
Governance
8.8 / 12
Discoverability
6.8 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 82/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
14
S&P Global Strong agent native 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
68.1
Agent
88.5
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 68.1/100 · strong
Contract Quality
18.0 / 25
Developer Ergonomics
13.9 / 20
Commercial Clarity
14.7 / 20
Operational Transparency
4.8 / 13
Governance
7.9 / 12
Discoverability
8.8 / 10
Agent readiness — 89/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
7 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
15
Financial Modeling Prep Strong agent native 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
67.6
Agent
81.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 67.6/100 · strong
Contract Quality
18.6 / 25
Developer Ergonomics
12.2 / 20
Commercial Clarity
17.4 / 20
Operational Transparency
9.9 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
9.8 / 15
Agent readiness — 82/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
16
Market Data Strong agent native 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
65.6
Agent
76.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 65.6/100 · strong
Contract Quality
14.6 / 25
Developer Ergonomics
16.5 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
9.6 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 76/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
17
Amberdata Strong agent native 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
64.8
Agent
81.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 64.8/100 · strong
Contract Quality
14.4 / 25
Developer Ergonomics
13.9 / 20
Commercial Clarity
12.1 / 20
Operational Transparency
9.9 / 13
Governance
6.3 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 82/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
18
ThetaData Strong agent native 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
63.1
Agent
64.4
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 63.1/100 · strong
Contract Quality
14.5 / 25
Developer Ergonomics
14.3 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
10.6 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 64/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
9 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
19
Tiingo Strong agent native Developer-First
Tiingo provides high-quality financial market data APIs across US equities, crypto, FX, fundamentals, and news, popular among quantitative researchers. APIs ...
Composite
62.9
Agent
77.9
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 62.9/100 · strong
Contract Quality
14.0 / 25
Developer Ergonomics
14.8 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
8.9 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 78/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
20
Kaiko Strong agent native 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
61.9
Agent
72.1
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 61.9/100 · strong
Contract Quality
14.2 / 25
Developer Ergonomics
15.7 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
7.5 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
9.8 / 15
Agent readiness — 72/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
21
Barchart Strong agent native 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
61.4
Agent
80.8
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 61.4/100 · strong
Contract Quality
15.5 / 25
Developer Ergonomics
13.5 / 20
Commercial Clarity
16.8 / 20
Operational Transparency
6.8 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 81/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
9 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
Developing 20 45–59.9 Real signal across most facets with visible, nameable gaps.
22
Finnhub Developing agent native 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
58.1
Agent
77.9
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 58.1/100 · developing
Contract Quality
15.8 / 25
Developer Ergonomics
11.3 / 20
Commercial Clarity
12.1 / 20
Operational Transparency
4.8 / 13
Governance
6.3 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
6.9 / 15
Agent readiness — 78/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
23
Coin Metrics Developing agent native 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
57.4
Agent
77.9
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 57.4/100 · developing
Contract Quality
17.7 / 25
Developer Ergonomics
16.1 / 20
Commercial Clarity
6.3 / 20
Operational Transparency
7.9 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 78/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
24
Deutsche Börse Developing agent native 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
56.7
Agent
70.2
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 56.7/100 · developing
Contract Quality
17.0 / 25
Developer Ergonomics
14.8 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
6.2 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
10.1 / 15
Agent readiness — 70/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
3 / 3
25
London Stock Exchange Group Developing agent native 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
56.7
Agent
76.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 56.7/100 · developing
Contract Quality
9.4 / 25
Developer Ergonomics
16.1 / 20
Commercial Clarity
14.7 / 20
Operational Transparency
6.8 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 76/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
26
Benzinga Developing agent native 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
56.6
Agent
63.5
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 56.6/100 · developing
Contract Quality
16.6 / 25
Developer Ergonomics
14.8 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
7.2 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
10.1 / 15
Agent readiness — 64/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
3 / 3
27
Dow Jones Developing agent native 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
55.9
Agent
75.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 55.9/100 · developing
Contract Quality
15.1 / 25
Developer Ergonomics
15.7 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
4.8 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 75/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
28
SIX Developing agent native 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
55.2
Agent
63.5
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 55.2/100 · developing
Contract Quality
15.6 / 25
Developer Ergonomics
15.7 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
6.2 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Banking & Open Finance
10.1 / 15
Agent readiness — 64/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
3 / 3
29
Intrinio Developing 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
54.3
Agent
45.2
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 54.3/100 · developing
Contract Quality
5.7 / 25
Developer Ergonomics
13.5 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
6.8 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 45/100 · agent ready
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
30
Morningstar Developing agent native 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
53.5
Agent
69.2
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 53.5/100 · developing
Contract Quality
13.2 / 25
Developer Ergonomics
17.0 / 20
Commercial Clarity
4.2 / 20
Operational Transparency
4.1 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
13.4 / 15
Agent readiness — 69/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 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
31
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
53.0
Agent
55.8
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 53.0/100 · developing
Contract Quality
13.9 / 25
Developer Ergonomics
9.6 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
4.8 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 56/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
32
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
51.7
Agent
40.4
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 51.7/100 · developing
Contract Quality
0.0 / 25
Developer Ergonomics
16.1 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
9.9 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 40/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
33
Intercontinental Exchange Developing agent ready 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
51.5
Agent
56.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 51.5/100 · developing
Contract Quality
12.6 / 25
Developer Ergonomics
7.8 / 20
Commercial Clarity
13.2 / 20
Operational Transparency
5.5 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
9.8 / 15
Agent readiness — 57/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
34
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
51.4
Agent
27.9
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 51.4/100 · developing
Contract Quality
0.0 / 25
Developer Ergonomics
13.0 / 20
Commercial Clarity
14.7 / 20
Operational Transparency
8.2 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
13.4 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
35
Marketstack Developing 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
50.9
Agent
57.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 50.9/100 · developing
Contract Quality
9.4 / 25
Developer Ergonomics
14.3 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
2.1 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 58/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
36
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
50.7
Agent
39.4
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 50.7/100 · developing
Contract Quality
0.0 / 25
Developer Ergonomics
13.5 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
8.2 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 39/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
37
dxFeed Developing agent ready 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
50.6
Agent
59.6
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 50.6/100 · developing
Contract Quality
14.2 / 25
Developer Ergonomics
14.3 / 20
Commercial Clarity
10.0 / 20
Operational Transparency
0.7 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
9.8 / 15
Agent readiness — 60/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
6 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
38
B3 (Brasil Bolsa Balcão) Developing agent ready 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
49.7
Agent
57.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 49.7/100 · developing
Contract Quality
9.4 / 25
Developer Ergonomics
14.3 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
3.4 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
13.4 / 15
Agent readiness — 58/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
3 / 3
39
QUODD Developing agent native 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
49.5
Agent
72.1
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 49.5/100 · developing
Contract Quality
14.6 / 25
Developer Ergonomics
10.0 / 20
Commercial Clarity
10.0 / 20
Operational Transparency
4.1 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 72/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
40
MarketAux Developing agent ready 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
48.6
Agent
56.7
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 48.6/100 · developing
Contract Quality
9.4 / 25
Developer Ergonomics
9.6 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
4.1 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 57/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
7 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
41
AlgoSeek Developing agent ready 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
48.3
Agent
51.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 48.3/100 · developing
Contract Quality
12.9 / 25
Developer Ergonomics
14.8 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
2.7 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 51/100 · agent ready
Machine-Readable Contract
18 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
Thin 10 30–44.9 Limited machine-readable signal beyond documentation a human can read.
42
TMX Group Thin 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
43.4
Agent
27.9
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 43.4/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
10.4 / 20
Commercial Clarity
15.3 / 20
Operational Transparency
5.8 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
43
Xignite Thin agent native 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
42.3
Agent
65.4
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 42.3/100 · thin
Contract Quality
9.1 / 25
Developer Ergonomics
14.8 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
0.7 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 65/100 · agent native
Machine-Readable Contract
18 / 18
Agentic Access Contract
15 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
5 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
44
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
41.0
Agent
39.4
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 41.0/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
15.2 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
2.7 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 39/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
45
OneTick (OneMarketData) Thin human only 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
39.0
Agent
13.5
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 39.0/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
10.9 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
4.8 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 14/100 · human only
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 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
4 / 4
Consent & Bot Identity
0 / 3
46
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
34.3
Agent
17.3
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 34.3/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
13.0 / 20
Commercial Clarity
5.3 / 20
Operational Transparency
4.8 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
6.9 / 15
Agent readiness — 17/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 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
47
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
34.2
Agent
27.9
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 34.2/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
7.0 / 20
Commercial Clarity
6.3 / 20
Operational Transparency
4.8 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
48
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
33.7
Agent
17.3
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 33.7/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
9.6 / 20
Commercial Clarity
5.8 / 20
Operational Transparency
2.7 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
9.8 / 15
Agent readiness — 17/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 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
49
IEX Cloud Thin agent aware 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
32.8
Agent
20.2
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 32.8/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
7.0 / 20
Commercial Clarity
7.9 / 20
Operational Transparency
9.9 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
3.9 / 15
Agent readiness — 20/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
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
30.6
Agent
21.2
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 30.6/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
9.6 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
0.0 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 21/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
51
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
30.4
Agent
17.3
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 30.4/100 · thin
Contract Quality
0.0 / 25
Developer Ergonomics
10.4 / 20
Commercial Clarity
4.2 / 20
Operational Transparency
2.7 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
8.1 / 15
Agent readiness — 17/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 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
Emerging 5 15–29.9 More than an index entry but still mostly links rather than artifacts.
52
Pico Emerging human only 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
29.0
Agent
13.5
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 29.0/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
7.0 / 20
Commercial Clarity
4.2 / 20
Operational Transparency
2.7 / 13
Governance
0.0 / 12
Discoverability
6.8 / 10
Regulatory · Securities & Market Data
11.4 / 15
Agent readiness — 14/100 · human only
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 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
4 / 4
Consent & Bot Identity
0 / 3
53
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
28.3
Agent
21.2
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 28.3/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
13.0 / 20
Commercial Clarity
2.1 / 20
Operational Transparency
2.7 / 13
Governance
0.0 / 12
Discoverability
9.3 / 10
Regulatory · Securities & Market Data
5.2 / 15
Agent readiness — 21/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
54
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
27.7
Agent
25.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 27.7/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
10.9 / 20
Commercial Clarity
6.8 / 20
Operational Transparency
0.0 / 13
Governance
0.0 / 12
Discoverability
10.0 / 10
Agent readiness — 25/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
12 / 12
Machine-Readable Auth
10 / 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
4 / 4
Consent & Bot Identity
0 / 3
55
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
26.3
Agent
21.2
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 26.3/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
8.3 / 20
Commercial Clarity
4.2 / 20
Operational Transparency
2.1 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
6.5 / 15
Agent readiness — 21/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
0 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
4 / 4
Consent & Bot Identity
0 / 3
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
23.2
Agent
9.6
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 23.2/100 · emerging
Contract Quality
0.0 / 25
Developer Ergonomics
7.0 / 20
Commercial Clarity
4.7 / 20
Operational Transparency
0.7 / 13
Governance
0.0 / 12
Discoverability
8.8 / 10
Regulatory · Securities & Market Data
5.2 / 15
Agent readiness — 10/100 · human only
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 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
Minimal 2 0–14.9 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
14.3
Agent
17.3
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 14.3/100 · minimal
Contract Quality
0.0 / 25
Developer Ergonomics
3.5 / 20
Commercial Clarity
0.0 / 20
Operational Transparency
0.7 / 13
Governance
0.0 / 12
Discoverability
8.0 / 10
Regulatory · Securities & Market Data
3.9 / 15
Agent readiness — 17/100 · agent aware
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
8 / 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
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
13.9
Agent
0.0
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
Composite quality — 13.9/100 · minimal
Contract Quality
0.0 / 25
Developer Ergonomics
3.0 / 20
Commercial Clarity
2.1 / 20
Operational Transparency
0.7 / 13
Governance
0.0 / 12
Discoverability
6.8 / 10
Regulatory · Securities & Market Data
3.3 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract
0 / 18
Agentic Access Contract
0 / 15
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