Custom MCP Server & many servers

[lnvestor]

Hi

is there a way anything on the config file all MCP tools should be bridged in one sse, also when i try custom MCP i get this error

Thread Run failed: 400 {"type":"error","error":{"type":"invalid_request_error","message":"tools.0.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level"}}

Thanks

[Nedomas]

Hey @lnvestor , oops - yeah, you shouldn’t be getting this error.

1. Just to try to recreate - I understand you are running a local SSE server over something like ngrok and added it to the assistant MCPs list?
2. Are you running a native SSE server or is it STDIO server wrapper with Supergateway?
3. Are you running some community MCP? Which then - maybe I could run it and see if it responds with the right tools input schema.
4. Regarding all MCP tools bridged in one SSE - maybe you can just add all the MCPs as separate servers? Superinterface supports adding multiple MCPs. I’m not sure if you can run multiple MCPs over a single SSE transport connection.

Thanks!

[Nedomas]

by the way, maybe you could try using another model from another provider? I think the error ("input_schema does not support oneOf, allOf, or anyOf at the top level") might be actually valid and OpenAI or Anthropic might not necessary support this feature of OpenAPI spec. Here’s some context: https://community.openai.com/t/oneof-allof-usage-has-problems-with-strict-mode/966047/5 https://community.openai.com/t/custom-gpts-action-openapi-3-0-specification-limited-support-oneof-anyof-allof/581015/8

If your server is custom MCP, you might need to transform your OpenAPI schema response into something simpler - I know oneOf can be simplified with some parsers/transformers as we do something like that when importing custom OpenAPI into Superinteface as function import.

[lnvestor]

@Nedomas Thanks for your answer, yeah i have pre difinded servers and i build custom ones as well,
i think that can be achieved over SSE i found this method worked on this repo by ConnectX.io
https://github.com/EvalsOne/MCP-connect