Wintermute

Wintermute is a leading global algorithmic trading firm and cryptocurrency market maker providing institutional-grade liquidity across centralized exchanges, decentralized finance (DeFi) protocols, and over-the-counter (OTC) markets. Its offerings span OTC spot trading for hundreds of tokens, options with bespoke structures, forwards, CFDs, programmatic "API liquidity", and a DeFi trading and liquidity-provisioning arm, plus Wintermute Ventures, an early-stage investment vehicle. Access to Wintermute's trading services is institutional and onboarding-gated through the node.wintermute.com portal (authenticated via an Auth0-backed OIDC / OAuth2 identity provider); there is no public self-serve developer API or open OpenAPI at this time. Added to the API Evangelist network as a portfolio company of Lightspeed Venture Partners and Pantera Capital.

Wintermute is profiled on the APIs.io network. Tagged areas include Company, Cryptocurrency, Trading, Market Making, and Liquidity.

Wintermute’s developer surface includes engineering blog and 4 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

4.7/100 minimal ▬ flat Agent 18/100 agent aware Front door AI 1/6 silent Heartbeat 91/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Cryptocurrency Trading Market Making Liquidity DeFi OTC Digital Assets Finance

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 4.7/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 1.1 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 1.7 / 15

Agent readiness — 18/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 6.6 — up to +18.7 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/wintermute/apis.yml: open an issue on github.com/api-evangelist/wintermute to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Dynamic Client Registration

measured — observed by APIs.io (published)

Security Posture 1

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

Wintermute Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: wintermute
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/wintermute.png
name: Wintermute
description: Wintermute is a leading global algorithmic trading firm and cryptocurrency market maker providing institutional-grade
  liquidity across centralized exchanges, decentralized finance (DeFi) protocols, and over-the-counter (OTC) markets. Its
  offerings span OTC spot trading for hundreds of tokens, options with bespoke structures, forwards, CFDs, programmatic "API
  liquidity", and a DeFi trading and liquidity-provisioning arm, plus Wintermute Ventures, an early-stage investment vehicle.
  Access to Wintermute's trading services is institutional and onboarding-gated through the node.wintermute.com portal (authenticated
  via an Auth0-backed OIDC / OAuth2 identity provider); there is no public self-serve developer API or open OpenAPI at this
  time. Added to the API Evangelist network as a portfolio company of Lightspeed Venture Partners and Pantera Capital.
url: https://raw.githubusercontent.com/api-evangelist/wintermute/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
- pantera-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Cryptocurrency
- Trading
- Market Making
- Liquidity
- DeFi
- OTC
- Digital Assets
- Finance
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.wintermute.com/
- type: Login
  url: https://node.wintermute.com/
- type: Blog
  url: https://www.wintermute.com/insights
- type: DomainSecurity
  url: security/wintermute-domain-security.yml
- type: WellKnown
  url: well-known/wintermute-well-known.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 4
  pass: local-v1

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