API Mocking

Requestly

Intercept & Modify HTTP Requests.

A browser extension and desktop app to intercept and modify network requests.

View tool details →

Microcks

Open source Kubernetes Native tool for API Mocking and Contract Testing.

A cloud-native, open-source tool for API mocking and contract testing.

View tool details →

Mockoon

The Easiest and Quicker Way to Run Mock APIs.

An open-source desktop application for creating mock APIs locally.

View tool details →

Pact

The home of Consumer-Driven Contract Testing.

A contract testing tool that generates mocks based on consumer contracts.

View tool details →

Postman

The Collaboration Platform for API Development.

An API platform for developers to design, build, test, and collaborate on APIs.

View tool details →

Beeceptor

Mock API, Inspect HTTP. Zero Coding.

An HTTP inspector and mocking tool for REST and webhook development.

View tool details →

Stoplight

Design, Document, and Develop APIs.

A collaborative API design platform with powerful mocking capabilities.

View tool details →

Traffic Parrot

Service Virtualization and API Mocking Tool.

A commercial tool for service virtualization and API mocking.

View tool details →

WireMock

A tool for building mock APIs.

A flexible, open-source tool for API mocking, running as a library or standalone server.

View tool details →

Mocki

Mock APIs. For real.

A tool for creating and managing mock APIs with a focus on realistic scenarios.

View tool details →

MockServer

API mocking and proxying.

An open-source mocking tool that can be run as a server, library, or container.

View tool details →

SoapUI

The World's Most Popular API Testing Tool.

An open-source tool for API functional testing, with mocking capabilities.

View tool details →

ReadyAPI (by SmartBear)

All-in-One API Testing Platform.

A comprehensive API testing platform that includes advanced service virtualization.

View tool details →

Mountebank

Open source service virtualization.

An open-source tool for service virtualization over multiple protocols.

View tool details →

Hoverfly

Lightweight, open source API simulation.

An open-source API simulation tool written in Go.

View tool details →

httpbin

A simple HTTP Request & Response Service.

A simple, open-source request and response service.

View tool details →

Imposter

The scriptable, configurable, mock server that's trivial to deploy.

A Docker-based, scriptable mock server.

View tool details →

Sandbox (by APIStrong)

Create API Sandbox Environments.

A tool for creating sandboxed API environments for testing and development.

View tool details →

Citrus Framework

Test automation framework for message-based integration tests.

An open-source framework for automated integration testing of message-based systems.

View tool details →