head to head · open source
fastapi_mcp vs aimock
fastapi_mcp has 12,007 GitHub stars, 969 forks, 169 open issues and last shipped 10 months ago. aimock has 933 stars, 71 forks, 1 open issues and last shipped 2 days ago. fastapi_mcp leads on adoption by 1,187% (12,007 vs 933 stars). fastapi_mcp is written in Python under MIT; aimock is written in TypeScript under MIT. fastapi_mcp has attracted 8% as many forks as stars, aimock 8%. aimock was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (llm, mcp), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| fastapi_mcp | aimock | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 933 |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2025-11-24 | 2026-09-18 |
| Forks | ⑂ 969 | ⑂ 71 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi_mcp if
- You weight community size — 12K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick aimock if
- You want the aimock feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and aimock fits your workflow better
About fastapi_mcp
FastAPI MCP is an MIT licensed Python library from Tadata that exposes the endpoints of an existing FastAPI application as Model Context Protocol (MCP) tools, so MCP clients such as Claude and Cursor can call a team's own API, and it is built for Python backend developers who already run FastAPI services and want agent access without hand writing a separate MCP server.
read the full fastapi_mcp overview →
About aimock
aimock is a TypeScript mock server that makes every AI provider, protocol, and service an application talks to answer on one local port, built for developers who need deterministic tests of LLM backed software without API keys, network calls, or surprise bills.
read the full aimock overview →
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Frequently asked questions
Is fastapi_mcp or aimock more popular?
fastapi_mcp has 12,007 GitHub stars and aimock has 933. fastapi_mcp has the larger community by that measure.
Are fastapi_mcp and aimock free?
Both are open source. fastapi_mcp is licensed under MIT and aimock under MIT. Neither carries a licence fee.
What is the difference between fastapi_mcp and aimock?
fastapi_mcp is written in Python and aimock in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, fastapi_mcp or aimock?
Choose fastapi_mcp if you want the larger community (12,007 stars) or its MIT licence terms. Choose aimock if its feature set, stack or MIT licence fits better. Both are self-hostable.