Glossary · Phase 1 · Building with LLMs

MCP

Also written: Model Context Protocol

Model Context Protocol: a standard way to plug tools and data sources into AI apps.

Try it now

Send each step in order. Note that JSON-RPC errors come back with HTTP 200: the error is inside the body, under "error".

Model Context Protocol · A standard way to plug tools and data into any AI app. About 25 minutes.

JSON-RPC: A simple way for one program to ask another to run a named command, with the request and reply written as JSON. MCP uses it.
MCP host: The AI app, such as a chat app or code editor, that connects to MCP servers and lets the model use their tools.
MCP server: A small program that offers tools or data to AI apps through MCP, such as one that reads your calendar.

Teach a small one to write, right in your browser. It takes about 20 seconds and needs no account.