head to head · open source
openapi-generator vs fastapi_mcp
openapi-generator has 26,848 GitHub stars, 7,751 forks, 5,820 open issues and last shipped 2 days ago. fastapi_mcp has 12,026 stars, 967 forks, 169 open issues and last shipped 12 months ago. openapi-generator leads on adoption by 123% (26,848 vs 12,026 stars). openapi-generator is written in Java under Apache-2.0; fastapi_mcp is written in Python under MIT. openapi-generator has attracted 29% as many forks as stars, fastapi_mcp 8%. openapi-generator was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (openapi), 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
| openapi-generator | fastapi_mcp | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 12K |
| License | Apache-2.0 | MIT |
| Written in | Java | Python |
| Last push | 2026-11-03 | 2025-11-24 |
| Forks | ⑂ 7.8K | ⑂ 967 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick openapi-generator if
- You weight community size — 27K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- 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 openapi-generator
OpenAPI Generator Master ( 7.28.0 ): :star::star::star: If you would like to contribute, please refer to guidelines and a list of open tasks. :star::star::star: :bangbang: To migrate from Swagger Codegen to OpenAPI Generator, please refer to the migration guide :bangbang: :notebook with decorative cover: For more information, please refer to the Wiki page and FAQ :notebook with decorative cover: :notebook with decorative cover: The eBook A Beginner's Guide to Code Generation for REST APIs is a good starting point for beginners :notebook with decorative cover: :warning: If the OpenAPI spec, templates or any input…
read the full openapi-generator overview →
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 →
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Frequently asked questions
Is openapi-generator or fastapi_mcp more popular?
openapi-generator has 26,848 GitHub stars and fastapi_mcp has 12,026. openapi-generator has the larger community by that measure.
Are openapi-generator and fastapi_mcp free?
Both are open source. openapi-generator is licensed under Apache-2.0 and fastapi_mcp under MIT. Neither carries a licence fee.
What is the difference between openapi-generator and fastapi_mcp?
openapi-generator is written in Java 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, openapi-generator or fastapi_mcp?
Choose openapi-generator if you want the larger community (26,848 stars) or its Apache-2.0 licence terms. Choose fastapi_mcp if its feature set, stack or MIT licence fits better. Both are self-hostable.