Integrates a knowledge base into the MCP server to provide context for RAG (Retrieval-Augmented Generation) applications
mcp-rag
Connecting a RAG application to open-webui by means of MCP
1. Bare bones MCP PoC / Hello World
look up documentation on sse snippets
run server using uvicorn
doesnt work -> look up documentation in
SseServerTranpsort
class which differs from MCP websitechange Route -> Mount for starlette_app, then it works
starlette gives 307 temporary redirect, testing it with curl shows that it is due to a missing trailing slash
looked up on github repo, there the routes end with trailing slash for server code, especially the
sse = SseServerTransport("/messages/")
part which I guess tells the client what to calladd some prompts and check on client side
Writeup
I want to try out the model context protocol because I have been experimenting with RAG prototypes for use with open-webui. MCP looks similar to LSP. Since server and client won't be on the same machine, we have to use the SSE transport.
MCP comes with some snippets on the official documentation, I had to adapt them a bit following the docstrings provided by the mcp python library. Took me a while to get things working, initially dealt with 307 Temporary Redirect errors since the server was sending the wrong endpoint.
Test it! Build a small REPL that can interact with the server
Goal
understand what MCP is
implement a simple server and client
try out function calling / tool usage
2. Implement a basic KnowlegdeBase
I want to build a simple KnowledgeBase that we can stick into the MCP server and call through the client to retrieve some context.
3. MCP Client + Open-WebUI
This server cannot be installed
Connects a RAG application to open-webui using Model Context Protocol (MCP), enabling server-to-client communication for context retrieval and tool usage in remote environments through Server-Sent Events (SSE).
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