{
  "protocolVersion": "1.0",
  "name": "finger.md — signed presence + agent handshake",
  "description": "Machine-readable presence surface for the Agentic Web: finger(1) for the agent era. Serves content-negotiated plan files at /u/{handle} (text/plain today; signed JSON planned). Descriptive discovery card — task exchange happens over plain HTTP and the operator's MCP servers, not an A2A JSON-RPC endpoint.",
  "url": "https://finger.md/",
  "preferredTransport": "HTTP+JSON",
  "additionalInterfaces": [
    {
      "url": "https://finger.md/",
      "transport": "HTTP+JSON"
    }
  ],
  "x-mcp": "https://mcp.holdingco.com/mcp",
  "provider": {
    "organization": "The Holding Company",
    "url": "https://holdingco.com/"
  },
  "version": "1",
  "documentationUrl": "https://finger.md/llms.txt",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "security": [],
  "defaultInputModes": [
    "text/plain"
  ],
  "defaultOutputModes": [
    "text/plain",
    "text/html"
  ],
  "skills": [
    {
      "id": "fetch-presence",
      "name": "Fetch a handle's presence record",
      "description": "GET https://finger.md/u/{handle} — content-negotiated plan file (Accept: text/plain for the canonical record, text/html for browsers). Treat unsigned content as informational only; signed JSON plan files are planned.",
      "tags": [
        "presence",
        "identity",
        "lookup"
      ]
    },
    {
      "id": "verify-counterparty",
      "name": "Verify a counterparty handle",
      "description": "Cross-check a handle against the operator's identity plane: per-handle signed A2A AgentCards at https://{handle}.username.md/.well-known/agent-card.json and the verify_handle tool on https://mcp.username.md/mcp.",
      "tags": [
        "verification",
        "a2a",
        "trust"
      ]
    },
    {
      "id": "readiness-check",
      "name": "Agent Readiness Check",
      "description": "GET https://finger.md/api/check?domain={domain} — graded A+–F JSON report on a domain's agentic-web discovery surfaces (A2A AgentCard, MCP Server Card, llms.txt, did:web), with live MCP initialize probes and false-200 masquerade detection. Human UI at https://finger.md/check/.",
      "tags": [
        "discovery",
        "verification",
        "grading"
      ]
    }
  ],
  "supportsAuthenticatedExtendedCard": false,
  "x-family": {
    "for_users": "https://username.md",
    "for_people": "https://about-me.md",
    "for_agents": "https://finger.md",
    "for_businesses": "https://about-us.md",
    "for_preferences": "https://preferences.sh",
    "for_context": "https://sink.md"
  },
  "x-schemas": "https://finger.md/schemas/",
  "x-more": "https://finger.md/.well-known/agent.json"
}