Free desktop API mocking platform. Create HTTP/REST and WebSocket mock servers with a modern UI. Perfect for developers, QA teams, and trainers.
Cost / License
- Free
- Proprietary
Platforms
- Mac
- Windows
- Linux

mockd is described as 'Multi-protocol mock server for HTTP, gRPC, GraphQL, WebSocket, MQTT, SSE, and SOAP. One Go binary, zero dependencies. Supports stateful CRUD, digital twins (passes real SDK tests), chaos engineering, OpenAPI/Postman/HAR/cURL import, and a built-in MCP server for AI agents' and is an app in the ai tools & services category. There are more than 10 alternatives to mockd for a variety of platforms, including Web-based, Mac, Windows, Linux and SaaS apps. The best mockd alternative is Mockoon, which is both free and Open Source. Other great apps like mockd are Beeceptor, WireMock, apimock-rs (API Mock) and MockServer.
Free desktop API mocking platform. Create HTTP/REST and WebSocket mock servers with a modern UI. Perfect for developers, QA teams, and trainers.

Instantly create HTTP mock API endpoints with custom responses, dynamic path params, custom headers, configurable delays, and real-time traffic logs.




Mocklets is a HTTP-based mock API simulator, which helps simulate APIs for faster parallel development and more comprehensive testing.


SmartMock.io is a tool to set up, manage, and troubleshoot HTTP protocol API mocks (REST, SOAP, JSON-RPC) in the cloud. This frees you up to focus on the logic of your mocks and not have to think about boilerplate code of your own HTTP mock servers.




Accelerate application development Quick and easy mock RESTful API and SOAP webservices. Generate from API definitions, instant deploy, collaborative build, and debugging tools for integration.
Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integrations tests.