Pact

Pact is an open source contract testing framework that verifies API consumer-provider interactions with support for Ruby, Java, .NET, JavaScript, Go, and Python. Pact Broker provides a hypermedia-driven HAL API for storing, retrieving, and verifying contracts between services.

Pact publishes 5 APIs on the APIs.io network, including Index API, Pacticipants API, Pacts API, and 2 more. Tagged areas include Contract Testing, Open-Source, and Testing.

Pact’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

28.3/100 thin ▬ flat Agent 20/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessFreemiumSelf serve⚡ Free to try

6 APIs

Contract Testing Open-Source Testing

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 28.3/100 · thin

Contract Quality 11.7 / 25

Developer Ergonomics 5.7 / 20

Access Clarity 3.2 / 20

Operational Transparency 1.4 / 13

Contract Governance 0.0 / 12

Discoverability 6.3 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

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/pact: 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 6

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

Rate Limits 1

Documented rate limits and quota policies.

Pact Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Slack

Slack

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: pact
name: Pact
description: Pact is an open source contract testing framework that verifies API consumer-provider interactions with support
  for Ruby, Java, .NET, JavaScript, Go, and Python. Pact Broker provides a hypermedia-driven HAL API for storing, retrieving,
  and verifying contracts between services.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/pact.png
tags:
- Contract Testing
- Open-Source
- Testing
tags_raw:
- Contract Testing
- Open Source
- Testing
url: https://raw.githubusercontent.com/api-evangelist/pact/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-04-28'
position: Consumer
access: 3rd-Party
specificationVersion: '0.23'
apis:
- aid: pact:pact-broker
  name: Pact Broker API
  description: Pact Broker is a hypermedia HAL API for storing and retrieving consumer contracts created with the Pact contract
    testing framework. It enables teams to share, version, and verify pacts between consumers and providers.
  humanURL: https://docs.pact.io/pact_broker
  tags:
  - Contract Testing
  - Testing
  properties:
  - type: Documentation
    url: https://docs.pact.io/pact_broker
  - type: GitHubRepository
    url: https://github.com/pact-foundation/pact_broker
  - type: Hosted Service
    url: https://pactflow.io
- aid: pact:pact-index-api
  name: Pact Index API
  description: The Index API from Pact — 1 operation(s) for index.
  humanURL: https://docs.pact.io/pact_broker
  tags:
  - Index
  properties:
  - type: OpenAPI
    url: openapi/pact-index-api-openapi.yml
- aid: pact:pact-pacticipants-api
  name: Pact Pacticipants API
  description: The Pacticipants API from Pact — 3 operation(s) for pacticipants.
  humanURL: https://docs.pact.io/pact_broker
  tags:
  - Pacticipants
  properties:
  - type: OpenAPI
    url: openapi/pact-pacticipants-api-openapi.yml
- aid: pact:pact-pacts-api
  name: Pact Pacts API
  description: The Pacts API from Pact — 2 operation(s) for pacts.
  humanURL: https://docs.pact.io/pact_broker
  tags:
  - Pacts
  properties:
  - type: OpenAPI
    url: openapi/pact-pacts-api-openapi.yml
- aid: pact:pact-verifications-api
  name: Pact Verifications API
  description: The Verifications API from Pact — 1 operation(s) for verifications.
  humanURL: https://docs.pact.io/pact_broker
  tags:
  - Verification
  tags_raw:
  - Verifications
  properties:
  - type: OpenAPI
    url: openapi/pact-verifications-api-openapi.yml
- aid: pact:pact-webhooks-api
  name: Pact Webhooks API
  description: The Webhooks API from Pact — 1 operation(s) for webhooks.
  humanURL: https://docs.pact.io/pact_broker
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/pact-webhooks-api-openapi.yml
common:
- type: License
  name: MIT
  url: https://github.com/pact-foundation/pact_broker/blob/master/LICENSE
- type: AgenticAccess
  url: agentic-access/pact-agentic-access.yml
- type: DomainSecurity
  url: security/pact-domain-security.yml
- type: Authentication
  url: authentication/pact-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/pact
- type: Website
  url: https://pact.io
- type: Documentation
  url: https://docs.pact.io
- type: GitHubOrganization
  url: https://github.com/pact-foundation
- type: Slack
  url: https://pact-foundation.slack.com
- type: Blog
  url: https://docs.pact.io/blog
- type: LlmsText
  url: https://docs.pact.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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