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@pact-foundation

Pact Foundation

The cross-language distributed contract testing framework.

Pact

Pact is the de-facto API contract testing tool. Replace expensive and brittle end-to-end integration tests with fast, reliable and easy to debug unit tests.
  • ⚡ Lightning fast
  • 🎈 Effortless full-stack integration testing - from the front-end to the back-end
  • 🔌 Supports HTTP/REST and event-driven systems
  • 🛠️ Configurable mock server
  • 😌 Powerful matching rules prevents brittle tests
  • 🤝 Integrates with Pact Broker / PactFlow for powerful CI/CD workflows
  • 🔡 Supports 12+ languages

Why use Pact? Contract testing with Pact lets you:

  • ⚡ Test locally
  • 🚀 Deploy faster
  • ⬇️ Reduce the lead time for change
  • 💰 Reduce the cost of API integration testing
  • 💥 Prevent breaking changes
  • 🔎 Understand your system usage
  • 📃 Document your APIs for free
  • 🗄 Remove the need for complex data fixtures
  • 🤷‍♂️ Reduce the reliance on complex test environments

Watch our series on the problems with end-to-end integrated tests, and how contract testing can help.

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  1. roadmap roadmap Public

    Developer Relations @ Pact - Your map to the Pact landscape for all-comers (maintainers, contributors, users, newbies)

    45 7

  2. pact-specification pact-specification Public

    Describes the pact format and verification specifications

    318 30

  3. pact-reference pact-reference Public

    Reference implementations for the pact specifications

    Rust 106 58

  4. pact_broker pact_broker Public

    Enables your consumer driven contracts workflow

    Ruby 745 195

  5. pact-core-mock-server pact-core-mock-server Public

    In-process mock server for matching HTTP requests and generating responses from a pact file

    Rust 10 2

  6. pact-js pact-js Public

    JS version of Pact. Pact is a contract testing framework for HTTP APIs and non-HTTP asynchronous messaging systems.

    TypeScript 1.8k 358

Repositories

Showing 10 of 92 repositories
  • pact-standalone Public

    Standalone Amalgamated Pact CLI - Broker Client / Mock Server / Provider Verifier / Stub Server / Plugin

    pact-foundation/pact-standalone's past year of commit activity
    Shell 46 MIT 36 2 (2 issues need help) 5 Updated Nov 13, 2026
  • pact_broker Public

    Enables your consumer driven contracts workflow

    pact-foundation/pact_broker's past year of commit activity
    Ruby 745 MIT 195 100 (1 issue needs help) 18 Updated Nov 13, 2026
  • pact-broker-chart Public

    This repository houses the Pact Broker Helm Chart

    pact-foundation/pact-broker-chart's past year of commit activity
    Go Template 14 MIT 26 1 2 Updated Nov 13, 2026
  • pact-broker-cli Public

    A CLI client for the Pact Broker. Publish/retrieve pacts and verification results.

    pact-foundation/pact-broker-cli's past year of commit activity
    Rust 3 MIT 3 3 4 Updated Nov 13, 2026
  • pact-broker-docker Public

    Dockerized Pact Broker

    pact-foundation/pact-broker-docker's past year of commit activity
    Ruby 115 MIT 112 2 17 Updated Nov 13, 2026
  • pact-docker-cli Public

    Dockerised Amalgamated Pact CLI - Broker Client / Mock Server / Provider Verifier / Stub Server / Plugin / PactFlow AI

    pact-foundation/pact-docker-cli's past year of commit activity
    Shell 13 MIT 13 1 12 Updated Nov 13, 2026
  • pact-provider-verifier Public

    Cross-platform, generic language, Pact provider verification tool

    pact-foundation/pact-provider-verifier's past year of commit activity
    Ruby 31 MIT 22 1 6 Updated Nov 13, 2026
  • pact-workshop-go Public

    Golang Pact workshop

    pact-foundation/pact-workshop-go's past year of commit activity
    Go 137 MIT 41 2 2 Updated Nov 13, 2026
  • pact-js Public

    JS version of Pact. Pact is a contract testing framework for HTTP APIs and non-HTTP asynchronous messaging systems.

    pact-foundation/pact-js's past year of commit activity
    TypeScript 1,827 358 87 (9 issues need help) 14 Updated Nov 12, 2026
  • pact-python Public

    Python version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.

    pact-foundation/pact-python's past year of commit activity
    Python 689 MIT 147 10 (1 issue needs help) 13 Updated Nov 12, 2026