head to head · open source
fastapi_mcp vs antirion
fastapi_mcp has 12,024 GitHub stars, 967 forks, 169 open issues and last shipped 11 months ago. antirion has 631 stars, 15 forks, 6 open issues and last shipped 3 days ago. fastapi_mcp leads on adoption by 1,806% (12,024 vs 631 stars). fastapi_mcp is written in Python under MIT; antirion is written in Rust under Apache-2.0. fastapi_mcp has attracted 8% as many forks as stars, antirion 2%. antirion 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 | antirion | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 631 |
| License | MIT | Apache-2.0 |
| Written in | Python | Rust |
| Last push | 2025-11-24 | 2026-10-31 |
| Forks | ⑂ 967 | ⑂ 15 |
| 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 antirion if
- You want the antirion feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and antirion fits your workflow better
About fastapi_mcp
Built by Tadata FastAPI MCP Expose your FastAPI endpoints as Model Context Protocol (MCP) tools, with Auth! Features Authentication built in, using your existing FastAPI dependencies! FastAPI native: Not just another OpenAPI MCP converter Zero/Minimal configuration required just point it at your FastAPI app and it works Preserving schemas of your request models and response models Preserve documentation of all your endpoints, just as it is in Swagger Flexible deployment Mount your MCP server to the same app, or deploy separately ASGI transport Uses FastAPI's ASGI interface directly for efficient communication…
read the full fastapi_mcp overview →
About antirion
Antirion The fastest open source AI gateway. One Rust binary, with the admin console built in, between your apps and every model provider. Performance · Getting started · Deploy · Features · Architecture · Docs [!TIP] Faster than Bifrost and LiteLLM. On the same dedicated machine, Antirion adds a fraction of Bifrost's overhead with a fraction of its CPU and memory, and keeps serving at rates where LiteLLM fails. See the benchmark. Why Antirion The fastest gateway we have measured. Sub millisecond overhead at thousands of requests per second on 4 vCPUs, and several times the throughput of the next fastest gateway…
read the full antirion overview →
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Frequently asked questions
Is fastapi_mcp or antirion more popular?
fastapi_mcp has 12,024 GitHub stars and antirion has 631. fastapi_mcp has the larger community by that measure.
Are fastapi_mcp and antirion free?
Both are open source. fastapi_mcp is licensed under MIT and antirion under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi_mcp and antirion?
fastapi_mcp is written in Python and antirion in Rust. 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 antirion?
Choose fastapi_mcp if you want the larger community (12,024 stars) or its MIT licence terms. Choose antirion if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.