Clear Street
Clear Street is a New York–based financial technology firm building independent, cloud-native prime brokerage, clearing, and execution infrastructure for institutional and active individual traders. It is a FINRA/SIPC member broker-dealer, a CFTC-registered Futures Commission Merchant, and FCA-authorised in the UK. Clear Street ships three public API surfaces: the Clear Street Trading API (OpenAPI 3.1, api.clearstreet.com) covering accounts, orders, executions, positions, instruments, market data, screeners, watchlists and the Omni AI financial copilot; the Clear Street Studio API (OpenAPI 3.0, prime-brokerage holdings, locates, easy-borrows, P&L, and Reg-T/portfolio margin) with a companion WebSocket activity stream; and an OAuth-protected remote MCP server for AI agents. First-party SDKs ship for Python, TypeScript, Go and Kotlin/Java, alongside a Go CLI (clst) and a published set of open Agent Skills.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles Clear Street the way a machine reads it — 53 machine-readable artifacts across 23 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Clear Street scores 63.9/100 (strong), with a separate agent-readiness read of 63/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-08-17 · rubric v0.11.0
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How we profile Clear Street
Each block below is one kind of artifact we hold for Clear Street. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 23
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Clear Street MCP Server
Clear Street's official remote Model Context Protocol server, exposing the Clear Street Trading API to AI assistants such as Claude and Gemini. OAuth-protected per RFC 9728 — an...
Clear Street API (Trades and Uploads)
Clear Street's legacy post-trade API for booking and cancelling trades and for submitting bulk trade-file uploads. Published as a Swagger 2.0 document in the clear-street/docs G...
Clear Street Accounts API
The Accounts API from Clear Street — 6 operation(s) for accounts.
Clear Street API version API
Endpoints for API service metadata.
Clear Street Calendar API
Access clocks and financial calendars for market sessions and events.
Clear Street Entities API
The Entities API from Clear Street — 2 operation(s) for entities.
Clear Street Holdings API
The Holdings API from Clear Street — 1 operation(s) for holdings.
Clear Street Instrument Data API
Retrieve instrument analytics, market data, news, and related reference data.
Clear Street Instruments API
The Instruments API from Clear Street — 6 operation(s) for instruments.
Clear Street Inventories API
The Inventories API from Clear Street — 1 operation(s) for inventories.
Clear Street Locates API
The Locates API from Clear Street — 2 operation(s) for locates.
Clear Street Margin API
The Margin API from Clear Street — 2 operation(s) for margin.
Clear Street Margin Simulations API
The Margin Simulations API from Clear Street — 2 operation(s) for margin simulations.
Clear Street Omni AI API
Thread-centric AI assistant for conversational trading. Create threads to start conversations, poll response objects for in-progress output, and read finalized messages from thr...
Clear Street Orders API
The Orders API from Clear Street — 6 operation(s) for orders.
Clear Street Performance API
The Performance API from Clear Street — 1 operation(s) for performance.
Clear Street PNL API
The PNL API from Clear Street — 3 operation(s) for pnl.
Clear Street Positions API
The Positions API from Clear Street — 6 operation(s) for positions.
Clear Street Rates API
The Rates API from Clear Street — 1 operation(s) for rates.
Clear Street Screener API
Search instruments and manage saved screeners.
Clear Street Trades API
Trade endpoints are used to insert or cancel trades into a our systems.
Clear Street Uploads API
Upload endpoints allow you to upload a `CSV` file that contain trades, in the same format as our [trade-file specification](https://github.com/clear-street/docs/blob/master/t...
Clear Street Watchlist API
Create and manage watchlists.
Scroll within the panel for all 23 ·
Open Collections 22
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONClear Street Accounts API
OPEN COLLECTIONClear Street Trading API version API
OPEN COLLECTIONClear Street Trading Calendar API
OPEN COLLECTIONCommon API Models Entities API
OPEN COLLECTIONCommon API Models Holdings API
OPEN COLLECTIONClear Street Trading Instrument Data API
OPEN COLLECTIONClear Street Instruments API
OPEN COLLECTIONCommon API Models Inventories API
OPEN COLLECTIONCommon API Models Locates API
OPEN COLLECTIONCommon API Models Margin API
OPEN COLLECTIONCommon API Models Margin Simulations API
OPEN COLLECTIONClear Street Trading Omni AI API
OPEN COLLECTIONClear Street Orders API
OPEN COLLECTIONCommon API Models Performance API
OPEN COLLECTIONCommon API Models PNL API
OPEN COLLECTIONClear Street Positions API
OPEN COLLECTIONCommon API Models Rates API
OPEN COLLECTIONClear Street Trading Screener API
OPEN COLLECTIONClear Street Trades API
OPEN COLLECTIONClear Street Uploads API
OPEN COLLECTIONClear Street Trading Watchlist API
OPEN COLLECTIONScroll within the panel for all 22 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
clear-street-mcp.yml
MCP SERVEREvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Clear Street Studio Events
ASYNCAPISecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Clear Street — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 5
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 7 ·
Build 5
SDKs, sample code, and the tooling you integrate with
Access & Security 7
Authentication, authorization, and security posture
Scroll within the panel for all 7 ·
Operate 3
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/clear-street · machine-readable index on apis.io
This is an independent, third-party profile of Clear Street, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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