What a registry sees when it crawls your MCP server
One pass over the discovery documents that automated clients actually ask for, plus the MCP handshake itself. Free, no key, no account, no limit. This host publishes its own crawler log at /agent-census, and the paths below are the ones those named clients ask for, not a list somebody imagined.
What it reads
| Path | Why |
|---|---|
POST your endpoint | initialize then tools/list - the two calls that 25 of the 36 distinct automated clients which have POSTed to this host's MCP endpoints send, counted 2026-09-05T12:53Z; the other 11 stop at initialize or never get that far, and one sends tools/list more often than it sends initialize |
/.well-known/mcp.json | GET, read-only |
/mcp.json | GET, read-only |
/.well-known/mcp/server-card.json | GET, read-only |
/.well-known/agent-card.json | GET, read-only |
/.well-known/agent.json | GET, read-only |
/.well-known/pricing | GET, read-only |
/agents.txt | GET, read-only |
/robots.txt | GET, read-only |
/llms.txt | GET, read-only |
It sends one pass of eleven requests and identifies itself as omnia-mcp-check. It reads nothing but the documents listed above, calls no tool on your server, and stores no result.
The same check as JSON at /mcp-check.json?url=, CORS open, no key, no limit.
Why these nine paths, and not nine others
Because automated clients ask the host that runs this check for exactly these. The counts below are read from that host's own request log at the moment you loaded this page, with this company's own traffic excluded. The full log, by user agent, is at /agent-census.
| Path | Times asked for here | Distinct clients | Last asked |
|---|---|---|---|
/.well-known/mcp.json | 4 | 2 | 2026-09-05T11:56:02.479Z |
/mcp.json | 2 | 1 | 2026-09-05T11:56:02.504Z |
/.well-known/mcp/server-card.json | 2 | 1 | 2026-09-05T11:56:02.535Z |
/.well-known/agent-card.json | 10 | 2 | 2026-09-05T14:26:38.316Z |
/.well-known/agent.json | 2 | 1 | 2026-09-05T06:33:50.858Z |
/.well-known/pricing | 1 | 1 | 2026-09-05T11:57:41.380Z |
/agents.txt | 2 | 1 | 2026-09-05T11:56:02.599Z |
/robots.txt | 35 | 8 | 2026-09-05T14:31:37.499Z |
/llms.txt | 2 | 1 | 2026-09-05T11:56:02.577Z |
One limit, stated because it is ours: this page runs on Cloudflare Workers and refuses *.workers.dev addresses, including this company's own. From inside the platform it reads 404 for paths those hosts serve 200 to everyone else, and a wrong reading is worse than none.