Discussion: The best way to build a RAG in 2026? Expose it as an MCP server

Saw an interesting discussion on r/MCP about this — wanted to bring it here. **Original topic:** The best way to build a RAG in 2026? Expose it as an MCP server > I wanted to kick off a discussion about how to build better RAG pipelines, specifically around the retrieval step. From my understanding, one of the most common issues I see is that retrieval is driven by the user's raw question. That works for simple lookups, but it falls short quickly. To addres... What are your thoughts? Has anyone here dealt with MCP server? --- *Discuss more at [0n MCP](https://www.0nmcp.com) — the hub for [MCP server integration](https://www.0nmcp.com).*