Get a full fake REST API with zero coding in less than 30 seconds (seriously)
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The industry standard for API mocking in JavaScript.
- msw
- mock
- mocking-framework
- service-worker
🕷 Super-agent driven library for testing node.js HTTP servers using a fluent API. Maintained for @forwardemail, @ladjs, @spamscanner, @breejs, @cabinjs, and @lassjs.
- supertest
- superagent
- assertions
- node
HTTP Request & Response Service, written in Python + Flask.
- http
- http-server
- testing
- service
HTTP server mocking and expectations library for Node.js
Integrated end-to-end testing framework written in Node.js and using W3C Webdriver API. Developed at @browserstack
An email and SMTP testing tool with API for developers
- email-testing
- go
- golang
- smtp-server
Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services
- java
- performance
- test
The complete load testing platform. Everything you need for production-grade load tests. Serverless & distributed. Load test with Playwright. Load test HTTP APIs, GraphQL, WebSocket, and more. Use any Node.js module.
Test Automation Made Simple
- test-automation
- assertions
- testing-tools
- mock-server
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
A tool for mocking HTTP services
- wiremock
- json
- mocking
- stubbing
Catch CSS curve balls.
- javascript
- screen-capture
- chrome-headless
- backstopjs
Java DSL for easy testing of REST services
Catches mail and serves it through a dream.
- smtp
- server
- ruby
syzkaller is an unsupervised coverage-guided kernel fuzzer
Quick and Easy server testing/validation
Yahoo! Cloud Serving Benchmark
Stub your network requests easily! Test your apps with fake network data and custom response time, response code and headers!
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
- oas
- prism
- mocking
- api-testing
MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.
- mock-server
- proxy
- java-client
- javascript-client
Easy Setup Stub Server
Fortio load testing library, command line tool, advanced echo server and web UI in go (golang). Allows to specify a set query-per-second load and record latency histograms and other useful stats.
- golang
- golang-library
- golang-application
- performance
Papercut SMTP -- The Simple Desktop Email Server