Contra

Contra is an independent-first, commission-free freelance marketplace and professional network for the jobs and skills of the future, founded in 2019 by Ben Huffman and Gajus Kuizinas and backed by Cowboy Ventures, Unusual Ventures, and NEA. Independents build a portfolio, get discovered, and manage work from inquiry to contract to payment without platform commissions. For developers, Contra exposes a read-only Public API (programs, filters, and expert profiles under https://contra.com/public-api/, authenticated with an X-API-Key header), an attribute-driven Webflow SDK, a React UI-kit, and a hosted, OAuth 2.1-protected Model Context Protocol (MCP) server at https://contra.com/mcp (scope mcp:tools).

Contra publishes 1 API contract indexed on the APIs.io network: Public Api. Tagged areas include Company, Future Of Work, Freelance Marketplace, Talent, and Hiring.

Contra’s developer surface includes documentation, engineering blog, pricing, signup flow, authentication, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

39.0/100 thin ▬ flat Agent 43/100 agent ready Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

AccessSelf serve

1 published contract 1 MCP Servers 1 Agent Skills

Company Future Of Work Freelance Marketplace Talent Hiring Professional Network MCP Developer API

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 39.0/100 · thin

Contract Quality 7.8 / 21

Developer Ergonomics 5.6 / 17

Access Clarity 7.6 / 17

Operational Transparency 2.3 / 11

Contract Governance 1.9 / 10

Discoverability 5.5 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 43/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 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 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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):

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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

4 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 36.7 — up to +15.8 composite points
Developer Ergonomics scores 32.7 — up to +13.5 composite points
Access Clarity scores 44.7 — up to +11.1 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/contra/apis.yml: open an issue on github.com/api-evangelist/contra 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Accelerator Portfolios (Y Combinator, 500 Global, Antler participation)	covered	9.6 (thin)	-	-
Raycast Store Extensions (first-party publishers + community-wrapped products)	covered	9.6 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Contra Public Api

The Public Api API from Contra — 3 operation(s) for public api.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Contra Public Public Api API

OPEN COLLECTION

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Contra MCP

Remote MCP server at contra.com over HTTP.

MCP SERVER

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

Find and filter experts in a Contra program

AGENT SKILL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Contra Openapi Overlay

5 actions · documentation · contra-openapi-original.json

DERIVED

Security Posture 2

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

Contra Authentication

apiKey/oauth2 · 2 schemes

SECURITY

Contra Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Contra Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

WellKnown

AgentSkill

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: contra
name: Contra
description: Contra is an independent-first, commission-free freelance marketplace and professional network for the jobs and
  skills of the future, founded in 2019 by Ben Huffman and Gajus Kuizinas and backed by Cowboy Ventures, Unusual Ventures,
  and NEA. Independents build a portfolio, get discovered, and manage work from inquiry to contract to payment without platform
  commissions. For developers, Contra exposes a read-only Public API (programs, filters, and expert profiles under https://contra.com/public-api/,
  authenticated with an X-API-Key header), an attribute-driven Webflow SDK, a React UI-kit, and a hosted, OAuth 2.1-protected
  Model Context Protocol (MCP) server at https://contra.com/mcp (scope mcp:tools).
url: https://raw.githubusercontent.com/api-evangelist/contra/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
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://contra.com/static/opengraph-assets/v2/fallbacks/contra-fallback-open-graph-image.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- cowboy-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-09-16'
tags:
- Company
- Future Of Work
- Freelance Marketplace
- Talent
- Hiring
- Professional Network
- MCP
- Developer API
tags_raw:
- Company
- Future Of Work
- Freelance Marketplace
- Talent
- Hiring
- Professional Network
- Model Context Protocol
- Developer API
apis:
- aid: contra:contra-public-api-api
  name: Contra Public Api
  description: The Public Api API from Contra — 3 operation(s) for public api.
  humanURL: https://github.com/contra/contra-sdk
  baseURL: https://contra.com/public-api
  tags:
  - Public APIs
  tags_raw:
  - Public Api
  properties:
  - type: OpenAPI
    url: openapi/contra-public-api-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/contra-openapi-overlay.yaml
- type: Website
  url: https://contra.com
- type: Documentation
  url: https://github.com/contra/contra-sdk
- type: Blog
  url: https://contra.com/blog
- type: Pricing
  url: https://contra.com/pricing
- type: SignUp
  url: https://contra.com/sign-up
- type: TermsOfService
  url: https://contra.com/policies/terms
- type: PrivacyPolicy
  url: https://contra.com/policies/privacy
- type: GitHubOrganization
  url: https://github.com/contra
- type: StatusPage
  url: https://status.contra.com
- type: MCPServer
  url: mcp/contra-mcp.yml
- type: Authentication
  url: authentication/contra-authentication.yml
- type: OAuthScopes
  url: scopes/contra-scopes.yml
- type: WellKnown
  url: well-known/contra-well-known.yml
- type: Packages
  url: packages/contra-packages.yml
- type: SDKs
  url: packages/contra-packages.yml
- type: Conformance
  url: conformance/contra-conformance.yml
- type: ErrorCatalog
  url: errors/contra-error-codes.yml
- type: Lifecycle
  url: lifecycle/contra-lifecycle.yml
- type: Conventions
  url: conventions/contra-conventions.yml
- type: DataModel
  url: data-model/contra-data-model.yml
- type: DomainSecurity
  url: security/contra-domain-security.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/contra-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Contra API — frequently asked questions

Does Contra have an API?

Yes. APIs.io lists 1 API from Contra, including Contra Public Api.

Is there an OpenAPI specification for the Contra API?

Yes. APIs.io indexes 1 OpenAPI specification for Contra, each linked for download from this page.

How do I authenticate with the Contra API?

Contra documents its authentication (apiKey/oauth2 · 2 schemes). The details are profiled on APIs.io as Contra Authentication.

Does Contra have an MCP server?

Yes. APIs.io lists 1 MCP server for Contra: Remote MCP server at contra.com over HTTP.

Is the Contra API ready for AI agents?

Contra has a Kin Score of 39.0 out of 100 (thin) and an Agent Readiness score of 43.2 (agent-ready), scored by API Evangelist on 2026-10-31.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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