Sequence Markets
Sequence Markets is a Y Combinator (Winter 2026) trading operating system for institutional crypto that provides unified execution infrastructure across 12 fragmented digital-asset venues — centralized exchanges (Coinbase, Binance, Kraken, OKX, Bybit, Bitget, Crypto.com, Hyperliquid), DeFi, and prediction markets (Kalshi, Polymarket). It packages one market view into a single trade via a smart order router (SOR), execution graphs, and WASM-compiled algo strategies deployed to multi-region low-latency edges. Developers access it through a Bearer-auth REST API and multiplexed WebSocket streams, a Python SDK, a Rust SDK, an Algo SDK, a `sequence` CLI, and an MCP interface for human, algorithmic, and agent workflows, with a full paper-trading sandbox, smart order routing, and transaction-cost analytics (TCA).
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Sequence Markets the way a machine reads it — 5 machine-readable artifacts across 1 API, 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 — Sequence Markets scores 41.8/100 (thin), with a separate agent-readiness read of 59/100 (agent ready). 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 2026-07-27 · rubric v0.5
How we profile Sequence Markets
Each block below is one kind of artifact we hold for Sequence Markets. 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 1
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.
Sequence Markets Trading API
Bearer-auth REST API and multiplexed WebSocket streaming surface for the Sequence Markets trading OS — credentials & wallets, market data, orders & execution graphs, positions &...
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.
sequence-markets-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.
Sequence Markets Streaming API
Multiplexed WebSocket streaming surface for the Sequence Markets trading OS, generated faithfully from the documented channel catalog at docs.sequencemkts.com/api/streaming. Not...
ASYNCAPISecurity Posture 2
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.
Resources
Every other property we hold for Sequence Markets — 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 4
Portal, sign-up, and the first successful call
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 4
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 4
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/sequence-markets · machine-readable index on apis.io