Open source api-testing projects
Every project in the registry tagged api-testing, ranked by real GitHub adoption.
Sleek, intuitive API development and testing platform
Lightweight, fast, and open-source API client for developers
Mobile Security Framework (MobSF) is an automated, all-in-one mobile application (Android/iOS/Windows) pen-testing, malware analysis and security assessment fra
Hurl, run and test HTTP requests with plain text.
Test Automation Made Simple
Friendly and fast tool for sending HTTP requests
Intercept, modify, and debug HTTP(S) requests effortlessly
A payment application to demonstrate real-world usage of Cypress testing methods, patterns, and workflows.
Modern command-line HTTP client for the API era
Catch API bugs before your users do
API Dash is a beautiful AI-powered open-source cross-platform (Desktop & Mobile) API Client built using Flutter which can help you easily create & customize you
Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
Terminal API client for HTTP, GraphQL and gRPC. Plain .http files you can diff and version, with workflows, mocks, profiling, tracing, OpenAPI import, SSH tunne
Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.
AI-native software testing platform — one YAML test language covering API, Web, mobile, messaging, data, and LLM scenarios. Self-hostable.
Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.
A simple and extensible behavioural testing library for Go. You can use api test to simplify REST API, HTTP handler and e2e tests.
Simulate API failures, throttling, and chaos — all from your command line.
:boom: Test REST, GraphQL APIs
Chapar is a simple and easy to use api testing tools aims to help developers to test their api endpoints. it support http and grpc protocols.
Port OpenAPI Specs to Postman Collections, inject test suite and run via Newman 👨🏽🚀
runn is a package/tool for running operations following a scenario.
A TypeScript-native acceptance testing framework that gives your Playwright Test, WebdriverIO, or Cucumber test suite the architecture it needs to scale.
REST API Testing Tool for all levels in a Test Pyramid
Lightweight Java agent for traffic capture and replay, enhancing testing and debugging.
Related tags
Frequently asked questions
How many open source api-testing projects are there?
This registry tracks 27 projects tagged api-testing, with 247,857 GitHub stars between them. The most-adopted is Hoppscotch at 80,724 stars.
Are these api-testing projects free to use?
Yes — 25 of the 27 carry an explicit open-source licence across 4 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which api-testing project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these api-testing projects still maintained?
24 of the 27 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.