An MCP Server Card is reachable at `/.well-known/mcp/server-card.json` (or referenced from a Link header) and validates against the Model Context Protocol spec.
An MCP (Model Context Protocol) server card declares the agent-callable tools your site exposes. Agents use it to discover what they can do on your behalf (search products, get quotes, file tickets) without you having to publish a custom integration per agent runtime.
Underlying specification: https://modelcontextprotocol.io
- Publish a server card at /.well-known/mcp/server-card.json describing your MCP server.
- List the tools, their parameters, and their auth requirements.
- Reference it from /llms.txt under an "Agent tools" section so agents discover it during their initial pass.
The snippet below uses your-domain.example as a placeholder. Replace it with your actual host before deploying. For a fix tailored to your live site, run a scan and open the per-domain remediation page.
Paste this into Claude Code, Cursor, or any assistant with your repository open. It carries the steps, how to verify them, and the shortcuts to avoid. It is generic, though: run a scan to get one written from what your pages actually do.
Run a scan against your domain to see whether discoverability.mcp_server_card currently passes, warns, or fails. Free, no signup; the score page is permanent and citable.