Running FastAPI-MCP remotely

[quantotto]

Is your feature request related to a problem? Please describe.

I would like to run MCP server separately (on a different machine or inside a dedicated docker container) from Fast API.

Describe the solution you'd like

Ability to configure FastAPIMCP to point to a remote Fast API. While a custom httpx.AsyncClient can be provided to FastApiMCP, it is not enough because FastApiMCP.setup_server creates openapi_schema locally and doesn't try to retrieve openapi.json from remote FastAPI using the provided AsyncClient object.

Describe alternatives you've considered

I have a workaround where I patch get_openapi with ,y own implementation and it all works. It would be nice to allow retrieval of the openapi spec from remote API (if http_client was provided) without any patching.

Additional context

Here is my current implementation / workaround:

https://gist.github.com/quantotto/637169d26e2268456296ebc9ed54a304

Thanks!

[ww-jermaine]

Hi @quantotto, made a PR based on your request, is this something that you are looking for?

Will wait from the team to review and support this feature

[quantotto]

Thank you so much @ww-jermaine
Yes, this is what was missing. The team might have some comments about the code, such as:

• doing import asyncio in the function - maybe should be moved to the top of the file with all the imports
• naming of the flag (fetch...): the code uses underscore prefix for storing attributes

All in all, functionality wise, this is it.

Thanks again!