</> Web Validators

MCP Server Discovery Checker

Probe the well-known paths an agent uses to find a site's Model Context Protocol server.

Checks /.well-known/mcp.json and /.well-known/mcp/server.json. MCP itself is an established, versioned specification, but where a site advertises its server is not yet standardized at a single path — so a site can run an MCP server and still show nothing here.

This is one of the checks the AI Agent Readiness Checker scores under API, Auth, MCP & Skill Discovery, and it can also be run on its own for any URL.

Experimental · Based on: Model Context Protocol · RFC 8615 — Well-Known Uniform Resource Identifiers (URIs)

About this validation

Experimental / emerging convention

The Model Context Protocol itself is an established, versioned open specification; the specific well-known discovery path this check probes has no single ratified location yet, so a site can run an MCP server and still show nothing here.

Rules reviewed:
Nov 11, 2026

Standards and vendor-documented behavior can change. This reflects the source as last reviewed above, not a permanent guarantee.