API Mocking

Ladle is a development environment for building and testing React components in isolation, with support for CSS, CSS Modules, PostCSS, Tailwind, Emotion, and styled-components.

Open-source tool for creating mock APIs, with desktop, CLI, and serverless options.

Create isolated API sandbox environments for risk-free testing and parallel development.

Virtualize third-party and internal services to remove bottlenecks and stabilize tests.

Mockoon Cloud offers AI assistants to generate realistic mock API templates and endpoints for fast prototyping and learning.

Deploy mock APIs to the cloud with Mockoon Cloud, share via URL, and manage visibility, regions, and live updates.

AI-powered API design and governance platform for collaborative, standards-compliant API development.

Open-source API mock testing tool for Java and the JVM.

WireMock Cloud is a hosted API mocking platform with native AI integration via the Model Context Protocol (MCP).

Java library for stubbing and mocking HTTP-based APIs.

NPM distribution for running WireMock as a standalone API mocking server.

Beta WebSockets support in WireMock for mocking WebSocket APIs.