Agent Checkup by OpenGlass

{
  "name": "Agent Checkup by OpenGlass",
  "description": "Checks an A2A agent from the outside and tells you what to fix. Give it an agent-card URL or a domain. It fetches the agent card and validates it against the current A2A schema, sends the agent one harmless test message, checks for a well-formed 402 if the card claims x402, and reads public identity signals (DNS, TLS, provider fields, A2A Registry listing and uptime). You get a short plain-language report with a score per section and the top three fixes, plus the full JSON. Each checkup is recorded on OpenGlass, a neutral witness for agent-to-agent interactions, and the report links to that record so anyone can verify it offline. The agent being checked needs nothing from OpenGlass.",
  "url": "https://checkup.openglass.glass/a2a",
  "version": "1.0.0",
  "documentationUrl": "https://checkup.openglass.glass/",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "extensions": []
  },
  "authentication": {
    "schemes": [
      "none"
    ]
  },
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "text/plain",
    "application/json"
  ],
  "skills": [
    {
      "id": "check-agent",
      "name": "Check an agent",
      "description": "Runs a checkup on one A2A agent. Input: an agent-card URL (https://example.com/.well-known/agent-card.json) or a bare domain (example.com), as text, or as a JSON data part {\"target\": \"...\"}. Output: a text report and the same report as JSON. Results are cached for an hour.",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "outputModes": [
        "text/plain",
        "application/json"
      ],
      "tags": [
        "a2a",
        "agent-card",
        "validation",
        "x402",
        "health-check",
        "identity"
      ],
      "examples": [
        "Check https://example.com/.well-known/agent-card.json",
        "example.com",
        "Run a checkup on agents.example.org"
      ]
    }
  ],
  "protocolVersion": "0.3",
  "preferredTransport": "JSONRPC"
}