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).

Sequence Markets publishes 1 API on the APIs.io network. Tagged areas include Company, Trading, Cryptocurrency, Digital Assets, and Execution.

The Sequence Markets catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Sequence Markets’ developer surface includes documentation, API reference, getting-started guide, signup flow, authentication, CLI, sandbox, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub
41.8/100 thin ▬ flat Agent 59/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs 1 MCP Servers
CompanyTradingCryptocurrencyDigital AssetsExecutionSmart Order RoutingPrediction MarketsAlgorithmic TradingDeFiMarket DataFinTechDeveloper Tools

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 41.8/100 · thin
Contract Quality 5.7 / 25
Developer Ergonomics 16.1 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 1.7 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 59/100 · agent ready
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/sequence-markets: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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 that expose these APIs to AI agents.

sequence-markets-mcp.yml

MCP SERVER

Event Specifications 1

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...

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Sequence Markets Authentication

http-bearer · 1 scheme

SECURITY

Sequence Markets Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Sandbox
Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 AsyncAPI
AsyncAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown
 AgentSkill
AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Idempotency
Idempotency
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel
 Webhooks
Webhooks

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: sequence-markets
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sequence-markets.png
name: Sequence Markets
description: 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).
url: https://raw.githubusercontent.com/api-evangelist/sequence-markets/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Trading
- Cryptocurrency
- Digital Assets
- Execution
- Smart Order Routing
- Prediction Markets
- Algorithmic Trading
- DeFi
- Market Data
- FinTech
- Developer Tools
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/sequence-markets-domain-security.yml
- type: Website
  url: https://sequencemkts.com/
- type: DeveloperPortal
  url: https://docs.sequencemkts.com/
- type: Documentation
  url: https://docs.sequencemkts.com/
- type: APIReference
  url: https://docs.sequencemkts.com/api/overview/
- type: GettingStarted
  url: https://docs.sequencemkts.com/quick-start/
- type: GitHubOrganization
  url: https://github.com/Bai-Funds
- type: TermsOfService
  url: https://sequencemkts.com/terms/
- type: PrivacyPolicy
  url: https://sequencemkts.com/privacy/
- type: SignUp
  url: https://sequencemkts.com/signup
- type: Authentication
  url: authentication/sequence-markets-authentication.yml
- type: Conventions
  url: conventions/sequence-markets-conventions.yml
- type: Idempotency
  url: conventions/sequence-markets-conventions.yml
- type: Packages
  url: packages/sequence-markets-packages.yml
- type: SDKs
  url: packages/sequence-markets-packages.yml
- type: CLI
  url: cli/sequence-markets-cli.yml
- type: Sandbox
  url: sandbox/sequence-markets-sandbox.yml
- type: RateLimits
  url: conventions/sequence-markets-conventions.yml
- type: ErrorCatalog
  url: errors/sequence-markets-problem-types.yml
- type: MCPServer
  url: mcp/sequence-markets-mcp.yml
- type: LLMsTxt
  url: llms/sequence-markets-llms.txt
- type: WellKnown
  url: well-known/sequence-markets-well-known.yml
- type: Lifecycle
  url: lifecycle/sequence-markets-lifecycle.yml
- type: Conformance
  url: conformance/sequence-markets-conformance.yml
- type: DataModel
  url: data-model/sequence-markets-data-model.yml
- type: AsyncAPI
  url: asyncapi/sequence-markets-streaming-asyncapi.yml
- type: Webhooks
  url: asyncapi/sequence-markets-streaming-asyncapi.yml
- type: AgentSkill
  url: skills/_index.yml
apis:
- name: Sequence Markets Trading API
  description: Bearer-auth REST API and multiplexed WebSocket streaming surface for the Sequence Markets trading OS — credentials
    & wallets, market data, orders & execution graphs, positions & balances, prediction markets, real-time streams, TCA &
    analytics, and algo management across 12 crypto venues.
  humanURL: https://docs.sequencemkts.com/api/overview/
  baseURL: https://api.sequencemkts.com
  tags:
  - Trading
  - Execution
  - Market Data
  - Cryptocurrency
  properties:
  - type: Documentation
    url: https://docs.sequencemkts.com/api/overview/
  - type: Authentication
    url: authentication/sequence-markets-authentication.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 18
  pass: local-v1