mock-server

mockoon

+11

Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.

karate

+9

Test Automation Made Simple

wiremock

+8

A tool for mocking HTTP services

prism

+9

Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.

mockserver-monorepo

+6

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.

resterm

+3

Terminal API client for HTTP, GraphQL, gRPC, WebSocket and SSE. Plain .http files you can diff and version, with scripted tests, workflows, mocks, recorder, and a CLI runner for CI.

microcks

+3

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

kubernetes-client

+2

Java client for Kubernetes & OpenShift