Open source
Pact
Consumer-driven contract testing for APIs, web apps and microservices
Mocking TestingConsumer driven contract tests
Alternatives to Microcks
12 tools like Microcks, chosen by what they do. About Microcks
Open source
Step CI
Open source API testing framework with YAML workflows and CI support
Mocking TestingAPI testing and monitoringInactive
Freemium
Beeceptor
Hosted mock server builder for REST, SOAP, GraphQL and gRPC APIs
Mocking TestingHosted mock APIs
Open source
Mock Service Worker
API mocking library for browser and Node.js
Mocking TestingMock APIs at network level
Open source
MockServer
Open source mock, proxy and recording server for HTTP and gRPC
Mocking TestingMock and proxy HTTP
Open source
Open source
Schemathesis
Open source tool that tests APIs by generating cases from schemas
Mocking TestingProperty based API testing
Open source
Mockoon
Create and run mock APIs locally with free open-source tools
Mocking TestingLocal mock API server
Open source
WireMock
Open source tool for simulating APIs in tests and development
Mocking TestingAPI mocking and simulation
Open source
REST Assured
Java library for testing and validating REST APIs with simple syntax
Mocking TestingJava REST API testing
Open source
Open source
Insomnia
Open source desktop client for testing HTTP, GraphQL and gRPC APIs
API ClientsOpen source API client