Knapsack splits tests evenly across parallel CI nodes to run fast CI build and save you time.
- ruby
- rspec
- cucumber
- minitest
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DeepfakeHTTP is a web server that uses HTTP dumps as a source for responses.
- http-server
- dump
- dummy
- testing
Betamax is a tool for mocking external HTTP resources such as web services and REST APIs in your tests. The project was inspired by the VCR library for Ruby.
Flexible HTTP command line stress tester for websites and web services
- load-testing
- stress-testing
- stress-tester
- performance-analysis
Patch fetch/XMLHttpRequest to fake a REST API server in the browser, based on JSON data.
Framework allows to perform load testing with Apache Jmeter, view application/server metrics in real-time with Grafana, analyze errors cause with detailed traces for failed requests, compare different test runs in scripted dashboard and perform frontend performance testing with sitespeed.io+webpagetest
Browser automation engine benchmark - Test bypass rates, performance & stealth against Cloudflare, DataDome, reCAPTCHA, Kasada, Imperva, Akamai, PerimeterX and other bot detection systems. Find the best browser for scraping.
- anti-detect
- antidetect-browser
- automation
- browser
Full-featured test framework for Go! Assertions, fuzzing, input testing, output capturing, and much more! 🍕
- testing
- testing-framework
- go
- golang
Scriptable, multipurpose mock server. Run standalone mock servers, or embed mocks within your tests or CI/CD pipeline.
Fake JSON Server is a Fake REST API that can be used as a Back End for prototyping or as a template for a CRUD Back End.
- csharp
- webapi
- dotnet-core
- dynamic
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.
- contract-testing
- microservices
- contract-driven-development
- cdd
AI-powered E2E testing for 10 platforms. 253 MCP tools. Zero config. Works with Claude, Cursor, Windsurf, Copilot. Test Flutter, React Native, iOS, Android, Web, Electron, Tauri, KMP, .NET MAUI — all from natural language.
A .NET library for intercepting server-side HTTP requests
- httpclient
- netstandard
- dotnet
- dotnet-core
Load testing as a service (LTaaS) with Apache Jmeter on kubernetes
🐵 HTTP mock server, useful to stub services and simulate dynamic API responses, leveraging ASP.NET Core features, built-in fake data generation and pure C# scripting
- csharp
- mock-server
- roslyn
- faker
Wraps any WSGI application and makes it easy to send test requests to that application, without starting up an HTTP server.
FANS: Fuzzing Android Native System Services
:dash: Simple yet powerful file-based mock server with recording abilities
HTTP mock for Golang: record and replay HTTP/HTTPS interactions for offline testing
Simplify software testing, by easily mocking any system using HTTP/HTTPS, allowing a team to test and develop against a service that is not complete or is unstable or just to reproduce planned/edge cases.
Super lightweight web framework in Swift based on SWSGI
Java binding for Hoverfly
- api-simulation
- service-virtualization
- java
- testing
SMTP mock server written on Golang. Mimic any 📤 SMTP server behavior for your test environment with fake SMTP server.
- smtp
- smtp-mock
- smtp-server
- smtp-mail
High-performance, multi-protocol mock server. HTTP, WebSocket, gRPC, MQTT, SSE, GraphQL, SOAP in one binary.
- api-mocking
- cli
- developer-tools
- golang