contract-testing

📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)

Test Automation Made Simple

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.

⚒️ Redocly CLI makes OpenAPI easy. Lint/validate to any standard, generate beautiful docs, and more.

JVM 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.

.NET 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.

Enables your consumer driven contracts workflow

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.

Port OpenAPI Specs to Postman Collections, inject test suite and run via Newman 👨🏽‍🚀

REST API Testing Tool for all levels in a Test Pyramid

🏝 automated contract testing via type checking for Elixir functions and mocks

Shift-left API Integration | Auto-fix integration drift before integration. Specmatic turns API specifications into executable contracts, continuously verifying that every change made by AI coding agents and engineers stays true to the desired behaviour. Ship AI-ready APIs 10x faster, from intent to implementation, with Spec-Driven API Development.

A proxy that validates responses and requests against an OpenAPI document. https://www.npmjs.com/package/openapi-cop https://hub.docker.com/r/lxlu/openapi-cop

HTTP/1.1, HTTP/2 and WebSockets stub server for stubbing distributed web services in Docker and non-containerized environments for integration and contract testing

Describes the pact format and verification specifications

PHP 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

Microservices Testing in practice.

Open-source OpenAPI mock server with cloud hosting and local modes for development, testing, and CI. Generates realistic API responses from specs with latency simulation, error injection, proxy fallback, and request validation. Validated against 2,200+ real-world OpenAPI specs.

A Swift / ObjeciveC DSL for creating pacts.

A sandbox for the third-party APIs you depend on. Built from the provider's spec, it fails on purpose, and it replays the exact failure production hit.