20250724

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MCP Server

Related page: 20250327

References:

• https://modelcontextprotocol.io/introduction#general-architecture
• https://docs.anthropic.com/en/docs/mcp

MCP (Model-Context Protocol) is a standard, streaming JSON-RPC protocol that lets an LLM obtain external data or run tools.

An MCP server is a server that provides that data: it receives mcp_tool_use requests from the LLM, calls downstream services, and streams an mcp_tool_result back to the model.

Let’s say we already have an API that returns the current temperature, we can place an MCP server in front of it:

LLM ──(MCP)──►  MCP server ──(REST)──► Weather-API
               ◄───────────── result ──┘

Note that the LLM never talks to the Weather-API directly; the MCP layer gives us a uniform, model-agnostic interface and keeps service logic separate.

TODO:

• Union Find (Disjoint Set)
• check available facilities for passport request
• Fidelity

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