API Testing Tools
Discover a curated collection of powerful open source API testing projects for developers seeking reliable, efficient testing solutions across various programming environments.
Open Source Projects tagged "API Testing Tools"
Scalar
11,821459
Scalar is an offline-first, open-source API client designed for modern developers working with OpenAPI/Swagger.
api-testing-tools
swagger-ui-alternative
api-tools
Last updated: 8/28/2025459 contributors
Insomnia
35,3922,010
An open-source, cross-platform API client that enables debugging, designing, testing, and mocking APIs across multiple protocols and formats.
api-testing-tools
api-debugging-tool
collaborative-api-design
Last updated: 1/13/20252010 contributors