head to head · open source
fastapi_mcp vs agent-router
fastapi_mcp has 12,026 GitHub stars, 967 forks, 169 open issues and last shipped 12 months ago. agent-router has 2,341 stars, 449 forks, 300 open issues and last shipped 7 days ago. fastapi_mcp leads on adoption by 414% (12,026 vs 2,341 stars). fastapi_mcp is written in Python under MIT; agent-router is written in Go under Apache-2.0. fastapi_mcp has attracted 8% as many forks as stars, agent-router 19%. agent-router was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, llm), 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 | agent-router | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 2.3K |
| License | MIT | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2025-11-24 | 2026-10-29 |
| Forks | ⑂ 967 | ⑂ 449 |
| 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 agent-router if
- You want the agent-router feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and agent-router 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 agent-router
The open source control plane for AI and agent traffic, powered by Envoy. An Agentic AI Foundation project. Formerly Envoy AI Gateway . Documentation · Quickstart · Blog · Release Notes · Talks Agent Router Agent Router gives application teams one consistent, OpenAI compatible API for every model and tool, from hosted providers to self hosted inference and MCP servers. Platform teams keep credentials, routing, quotas, failover, and usage attribution in one place, enforced by Envoy and Envoy Gateway. Agent Router controls. Envoy carries. Formerly Envoy AI Gateway Envoy AI Gateway is now Agent Router , an Agentic…
read the full agent-router overview →
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Frequently asked questions
Is fastapi_mcp or agent-router more popular?
fastapi_mcp has 12,026 GitHub stars and agent-router has 2,341. fastapi_mcp has the larger community by that measure.
Are fastapi_mcp and agent-router free?
Both are open source. fastapi_mcp is licensed under MIT and agent-router under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi_mcp and agent-router?
fastapi_mcp is written in Python and agent-router in Go. 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 agent-router?
Choose fastapi_mcp if you want the larger community (12,026 stars) or its MIT licence terms. Choose agent-router if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.