Skip to content
@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.

Pinned Loading

  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

    308 28

  3. pact-reference pact-reference Public

    Reference implementations for the pact specifications

    Rust 100 50

  4. pact_broker pact_broker Public

    Enables your consumer driven contracts workflow

    Ruby 736 187

  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 9 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 1.7k 352

Repositories

Showing 10 of 86 repositories
  • pact-foundation/pact-workshop-dotnet’s past year of commit activity
    C# 9 Apache-2.0 3 1 0 Updated Jan 14, 2026
  • pact-reference Public

    Reference implementations for the pact specifications

    pact-foundation/pact-reference’s past year of commit activity
    Rust 100 MIT 50 47 (2 issues need help) 1 Updated Jan 14, 2026
  • pact-core-mock-server Public

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

    pact-foundation/pact-core-mock-server’s past year of commit activity
    Rust 9 MIT 2 1 0 Updated Jan 14, 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 1,729 352 98 (14 issues need help) 12 Updated Jan 14, 2026
  • pact-broker-chart Public

    This repository houses the Pact Broker Helm Chart

    pact-foundation/pact-broker-chart’s past year of commit activity
    Smarty 14 MIT 25 1 2 Updated Jan 13, 2026
  • 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
    Ruby 43 MIT 36 7 (2 issues need help) 13 Updated Jan 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 33 MIT 24 1 3 Updated Jan 13, 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 647 MIT 144 14 (3 issues need help) 6 Updated Jan 13, 2026
  • pact-message-ruby Public

    Create and verify consumer driven contracts for messages

    pact-foundation/pact-message-ruby’s past year of commit activity
    Ruby 10 MIT 10 1 3 Updated Jan 13, 2026
  • pact-js-core Public

    Core binaries for pact-js, a Contract Testing Framework. NOTE: If you are looking to do Pact contract testing in node, you almost certainly want pact-js, not pact-node.

    pact-foundation/pact-js-core’s past year of commit activity
    TypeScript 152 MIT 79 5 (1 issue needs help) 1 Updated Jan 13, 2026

Most used topics

Loading…