criba: who is calling your MCP server

Connect Remote server

claude mcp add --transport http criba https://criba.cribalo.com/mcp

{
  "mcpServers": {
    "criba": {
      "url": "https://criba.cribalo.com/mcp"
    }
  }
}

{
  "servers": {
    "criba": {
      "type": "http",
      "url": "https://criba.cribalo.com/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://criba.cribalo.com/mcp

Tools 3 found in our last check

• identify_client

  Who a User-Agent and/or an MCP clientInfo.name claims to be, matched against criba's catalog of known MCP indexers, verifiers, A2A directories, AI crawlers, scanners and HTTP libraries. This is a declaration, not proof: use classify_visitor for behaviour. Pass at least one of th…

• classify_visitor

  Classify one visitor from its requests to your MCP server, A2A agent or website. Returns the declared identity, the observed behaviour class (acts-on-results, agent-tool-use, agent-message, probe, indexer, web-scanner, web), the signals and reasons, and mismatch=true when behavi…

• list_known_bots

  List criba's catalog of known agent-ecosystem bots, optionally filtered by category or protocol. Each entry has its id, name, category, URL, matching rules and what it was seen doing. Catalog 2026-11-11, CC-BY-NC-4.0 (non-commercial use with attribution).

Details

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