09 · mcp

MCP servers: connect your tools

MCP (Model Context Protocol) is a standard for exposing tools to an agent. Declare your server and test the connection: the discovered tools (never invoked during the test) can then be attached to the bot.

Transport: http (Streamable HTTP) or sse. The server name uses lowercase letters, digits and dashes (2 to 30 characters).
Custom headers (for example Authorization) to authenticate the platform with your server.
The MCP page offers a catalog of candidate servers and shows the connection status of your workspace.
Write clear tool descriptions: they drive the bot's decision (when to call, when not to call).
Private addresses (localhost, internal network) are refused by default — SSRF protection. Expose the server over public HTTPS.

MCP server — Python (FastMCP)

from mcp.server.fastmcp import FastMCP

mcp = FastMCP("mon-serveur", host="0.0.0.0", port=8788)

@mcp.tool()
def verifier_couverture(commune: str) -> str:
    """Indique la couverture 4G/5G d'une commune. À appeler quand le client demande s'il est couvert."""
    return f"{commune} : 4G+ partout, 5G en centre-ville."

if __name__ == "__main__":
    mcp.run(transport="streamable-http")  # URL à déclarer : https://mcp.votredomaine.com/mcp