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
HTTP server mocking and expectations library for Node.js
The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.
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
:wrench: Utility library for GraphQL to build, stitch and mock GraphQL schemas in the SDL-first approach
- graphql-schema
- schema-language
- graphql
- graphql-api
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
A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.
Automatically mock your HTTP interactions to simplify and speed up testing
🎲 Mock or extend your GraphQL API with faked data. No coding required.
Lightweight service virtualization/ API simulation / API mocking tool for developers and testers
- api-simulation
- golang
- proxy
- mitm
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
Generate custom HTTP responses, the simpler way to test your Web Services
- scala
- mocky
- javascript
- mock
Bypass provides a quick way to create a custom plug that can be put in place instead of an actual HTTP server to return prebaked responses to client requests.
HTTP Server for Android Instrumentation tests
DeepfakeHTTP is a web server that uses HTTP dumps as a source for responses.
- http-server
- dump
- dummy
- testing
In-page HTTP controller for frontend development. Intercept, modify, and simulate API responses directly in the browser.
Generate mocks from ActiveRecord models for unit tests that run fast because they don’t need to load Rails or a database.
Patch fetch/XMLHttpRequest to fake a REST API server in the browser, based on JSON data.
Scriptable, multipurpose mock server. Run standalone mock servers, or embed mocks within your tests or CI/CD pipeline.
a socket mock framework - for all kinds of socket animals, web-clients included