Find AI tools for API testing, endpoint validation, mock servers, and automated API documentation.
An efficient API documentation management tool that fully adheres to the OpenAPI specification and incorporates advanced LLM technology. This tool can automate the generation of API documentation, data models, and test cases, greatly enhancing development efficiency and documentation quality.
Your agents are guessing at APIs. Give them the actual Agent-Native spec. 1500+ API's Ready To-Use skills, Compile any API spec into a lean, agent-native format. 10× smaller. OpenAPI, GraphQL, AsyncAPI, Protobuf, Postman.
Turns any OpenAPI/Swagger API into an CLI with set of commands. One CLI command per endpoint.
A MCP server that enables Claude to discover and call any API endpoint through semantic search. Intelligently chunks OpenAPI specifications to handle large API documentation, with built-in request execution capabilities. Perfect for integrating private APIs with Claude Desktop.
Expose your FastAPI endpoints as Model Context Protocol (MCP) tools, with Auth!
🧩 The Ultimate Toolkit for Generating Type-Safe API Clients, Hooks, and Validators.
| Tool | Stars | Language | License | Score |
|---|---|---|---|---|
| apicat | ★ 291 | Go | — | 26 |
| LAP | ★ 212 | Python | Apache-2.0 | 41 |
| openapi-to-cli | ★ 159 | TypeScript | MIT | 44 |
| mcp-server-any-openapi | ★ 80 | Python | MIT | 32 |
| postman-mcp-server | ★ 192 | TypeScript | Apache-2.0 | 48 |
| postman-mcp-server | ★ 145 | TypeScript | MIT | 36 |
| fastapi_mcp | ★ 11.6k | Python | MIT | 44 |
| summon-app | ★ 124 | TypeScript | Apache-2.0 | 28 |
| reverse-check | ★ 79 | Vue | MIT | 39 |
| kubb | ★ 1.7k | TypeScript | — | 39 |
The top api testing & mocking tools include apicat, LAP, openapi-to-cli. These are ranked by our composite score based on GitHub stars, community activity, and code quality.
Most tools listed here are open-source. 8 out of 10 have explicit open-source licenses, making them free to use and modify.
Consider your tech stack (language compatibility), project scale (stars indicate community trust), and specific features you need. Use the comparison table above to evaluate side by side.
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