Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.
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Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
Highly opinionated mocking framework for PHP 5.3+
: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 utility for mocking out the Python Requests library.
- tag-production
GoMock is a mocking framework for the Go programming language.
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.
🔮 Proxies nodejs require in order to allow overriding dependencies during testing.
Lightweight service virtualization/ API simulation / API mocking tool for developers and testers
- api-simulation
- golang
- proxy
- mitm
An in memory postgres DB instance for your unit tests
- hacktoberfest
- pg-promise
- typeorm
- node-postgres
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
Get a full fake GraphQL API with zero coding in less than 30 seconds.
- graphql
- graphql-server
- express-graphql
Boilerplate-free mocking framework for Swift!
- mock
- mockito
- cuckoo
- stub
C++ mocking made easy. A simple yet very expressive, headers only library for c++ mocking.
Mock Alamofire and URLSession requests without touching your code implementation
- wt-branch-protection-two-approvals
- wt-branch-protection-exempt
JVM version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.
- pact
- consumer-driven-contracts
- contract-testing
- hacktoberfest
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.
A mocking library for Erlang
- erlang
- testing
- mocking-library
- meck
:heavy_check_mark: Mock data for your prototypes and demos. Remote deployments to Zeit now.
- atmo
- prototyping
- mock-services
- mock-server
Powerful mock generation tool for Go programming language
In-page HTTP controller for frontend development. Intercept, modify, and simulate API responses directly in the browser.