{
  "schema_version": "1",
  "generated_at": "2026-10-20T00:00:00Z",
  "tag": "a2a",
  "count": 4,
  "entries": [
    {
      "id": "a2a-protocol-specification",
      "title": "Agent2Agent (A2A) Protocol Specification",
      "publisher": "A2A Protocol",
      "authors": [],
      "date_published": null,
      "url": "https://a2a-protocol.org/latest/specification/",
      "type": "spec",
      "category": "agent-protocols",
      "summary": "Official A2A specification (latest released version 1.0.0), an open standard for communication and interoperability between independent, potentially opaque AI agent systems built on different frameworks or by different vendors.",
      "tags": [
        "a2a",
        "interop"
      ],
      "verified_at": "2026-10-20",
      "last_checked": "2026-10-20",
      "http_status": 200,
      "archive_url": "http://web.archive.org/web/20261009134313/https://a2a-protocol.org/latest/specification/"
    },
    {
      "id": "ai-catalog",
      "title": "AI Catalog",
      "publisher": "AI Catalog (Agent-Card)",
      "authors": [],
      "date_published": null,
      "url": "https://ai-catalog.io/",
      "type": "spec",
      "category": "agent-protocols",
      "summary": "Cross-protocol draft standard for a typed, nestable JSON catalog that lists heterogeneous AI artifacts (MCP servers, A2A agents, datasets and more) for discovery. It is developed by members of several AI protocol communities.",
      "tags": [
        "interop",
        "mcp",
        "a2a",
        "standards"
      ],
      "verified_at": "2026-10-20",
      "last_checked": "2026-10-20",
      "http_status": 200,
      "archive_url": "http://web.archive.org/web/20260919213800/https://ai-catalog.io/"
    },
    {
      "id": "a2a-agent-discovery",
      "title": "Agent Discovery (A2A Protocol)",
      "publisher": "A2A Protocol",
      "authors": [],
      "date_published": null,
      "url": "https://a2a-protocol.org/latest/topics/agent-discovery/",
      "type": "docs",
      "category": "agent-protocols",
      "summary": "A2A guidance on finding agents through a well-known Agent Card URL (/.well-known/agent-card.json), curated registries, or direct configuration. It notes that the spec does not prescribe a registry API.",
      "tags": [
        "a2a",
        "interop"
      ],
      "verified_at": "2026-10-20",
      "last_checked": "2026-10-20",
      "http_status": 200,
      "archive_url": "http://web.archive.org/web/20261007210746/https://a2a-protocol.org/latest/topics/agent-discovery/"
    },
    {
      "id": "a2a-registry-org",
      "title": "Global A2A Registry",
      "publisher": "A2A Registry",
      "authors": [],
      "date_published": null,
      "url": "https://www.a2a-registry.org/",
      "type": "directory",
      "category": "agent-protocols",
      "summary": "Free public registry of A2A agents that is itself discoverable as an A2A agent. It offers natural-language agent search and DNS- and GitHub-based verification, and its agent card includes an extension that declares a payment model.",
      "tags": [
        "a2a",
        "directory",
        "identity"
      ],
      "verified_at": "2026-10-20",
      "last_checked": "2026-10-20",
      "http_status": 200,
      "archive_url": "http://web.archive.org/web/20261014041221/https://www.a2a-registry.org/"
    }
  ]
}