head to head · open source
one-api vs fastapi_mcp
one-api has 36,963 GitHub stars, 6,868 forks, 1,036 open issues and last shipped 8 months ago. fastapi_mcp has 12,007 stars, 969 forks, 169 open issues and last shipped 10 months ago. one-api leads on adoption by 208% (36,963 vs 12,007 stars). one-api is written in JavaScript under MIT; fastapi_mcp is written in Python under MIT. one-api has attracted 19% as many forks as stars, fastapi_mcp 8%. one-api was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (claude), 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.
← all 20902 open source comparisons
Side by side
| one-api | fastapi_mcp | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 12K |
| License | MIT | MIT |
| Written in | JavaScript | Python |
| Last push | 2026-01-09 | 2025-11-24 |
| Forks | ⑂ 6.9K | ⑂ 969 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick one-api if
- You weight community size — 37K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick fastapi_mcp if
- You want the fastapi_mcp feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and fastapi_mcp fits your workflow better
About one-api
One API is a self hosted LLM API management and key redistribution system that exposes many model providers through the standard OpenAI API format, aimed at developers, teams and operators who want a single endpoint, a single key model and a single quota surface across providers.
read the full one-api overview →
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 →
More in Developer Tools
Related comparisons
More API Development & Testing projects
Compare either of these against the rest of the API Development & Testing field.
Frequently asked questions
Is one-api or fastapi_mcp more popular?
one-api has 36,963 GitHub stars and fastapi_mcp has 12,007. one-api has the larger community by that measure.
Are one-api and fastapi_mcp free?
Both are open source. one-api is licensed under MIT and fastapi_mcp under MIT. Neither carries a licence fee.
What is the difference between one-api and fastapi_mcp?
one-api is written in JavaScript and fastapi_mcp in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, one-api or fastapi_mcp?
Choose one-api if you want the larger community (36,963 stars) or its MIT licence terms. Choose fastapi_mcp if its feature set, stack or MIT licence fits better. Both are self-hostable.