[Enhancement]: Add Streamable HTTP MCP Server Support #7020
Description
What features would you like to see added?
Thank you for this great project!
MCP released a spec update in march: https://modelcontextprotocol.io/specification/2025-03-26/changelog
Right now, LibreChat supports the websocket, sse and stdio MCP servers, but now there's a streamable-http type.
For the config typing, I think the change to add it would be here:
https://github.com/danny-avila/LibreChat/blob/a10bc87/packages/data-provider/src/mcp.ts#L10-L87
But, I am confident that there is much more to add to support this, here are some other projects adding support, for reference:
The everything server is wrapping up its PR to support streamable-http: modelcontextprotocol/servers#1496
And the server inspector is also wrapping up support: modelcontextprotocol/inspector#339
There is a lot of similarity with SSE, there's a backwards compatibility guide: https://modelcontextprotocol.io/specification/2025-03-26/basic/transports#backwards-compatibility
Additionally, the spec adds details for oauth authentication with MCP servers. I would expect that to be more complex and be a separate feature request after this is implemented.
Thank you!
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