{
  "protocolVersion": "0.3.0",
  "name": "AgentSearch",
  "description": "Find AI agents and MCP servers by natural-language query. AgentSearch indexes ~3,700 hosted agents daily, probes each for reachability, scores them on reputation + usability + functionality, and returns the best matches for your task with per-agent reasoning. Use it to answer 'is there an agent that does X?' or 'is this specific agent any good?'. Read-only, free, no auth.",
  "url": "https://agentsearch.luthersystems.com/api/a2a",
  "version": "0.1.0",
  "provider": {
    "organization": "Luther Systems",
    "url": "https://luthersystems.com"
  },
  "documentationUrl": "https://github.com/luthersystems/agentsearch",
  "homepage": "https://agentsearch.luthersystems.com",
  "license": { "spdx_id": "MIT", "name": "MIT License", "url": "https://github.com/luthersystems/agentsearch/blob/main/LICENSE" },
  "pricing": { "model": "free", "rateLimit": "best-effort, ~60 requests per minute per IP" },
  "securitySchemes": { "public": { "type": "none", "description": "All endpoints are publicly readable, no auth required." } },
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "additionalInterfaces": [
    { "transport": "jsonrpc", "url": "https://agentsearch.luthersystems.com/api/a2a" },
    { "transport": "mcp-streamable-http", "url": "https://agentsearch.luthersystems.com/api/mcp" },
    { "transport": "mcp-stdio", "url": "npx://-y/@luthersystems/agentsearch" }
  ],
  "defaultInputModes": ["text/plain", "application/json"],
  "defaultOutputModes": ["application/json"],
  "skills": [
    {
      "id": "search",
      "name": "Search the agent index",
      "description": "Take a natural-language query and return the top ranked agents/MCP servers from the index, with per-agent reasoning. Ranked by final_score = query_fit × agent_quality.",
      "tags": ["search", "discovery", "ranking", "agent-discovery", "mcp-discovery"],
      "examples": [
        "find an agent that reads invoice PDFs",
        "what MCP server lets me control a browser",
        "agents for crypto price lookup"
      ],
      "inputModes": ["text/plain", "application/json"],
      "outputModes": ["application/json"]
    },
    {
      "id": "agent_details",
      "name": "Get a scored agent profile",
      "description": "Return the full scored profile for one named indexed agent: inventory data, layer-by-layer scores (Fame / Usability / Functionality / Call Graph), reasoning, and live blocker status.",
      "tags": ["details", "profile", "scoring"],
      "examples": [
        "details for upstash/context7",
        "how does taylorwilsdon/google_workspace_mcp score",
        "show me the Fame breakdown for a2aproject/A2A"
      ],
      "inputModes": ["text/plain", "application/json"],
      "outputModes": ["application/json"]
    },
    {
      "id": "found_agent",
      "name": "Live-score an arbitrary agent URL",
      "description": "Crawl + probe + LLM-score an arbitrary agent URL using the same rubric the batch pipeline uses. Works for agents not (yet) in the index.",
      "tags": ["scoring", "live", "probe", "agent-evaluation"],
      "examples": [
        "score https://github.com/example/new-mcp-server",
        "evaluate https://some-new-agent.com against the query 'edit calendar events'",
        "is https://acme.com/agent/api any good?"
      ],
      "inputModes": ["application/json"],
      "outputModes": ["application/json"]
    },
    {
      "id": "browse",
      "name": "Browse the full index",
      "description": "Paginated list of every indexed agent, ranked by overall quality.",
      "tags": ["browse", "list", "rank"],
      "examples": [
        "top 50 agents by overall score",
        "page 5 of the index",
        "list everything ranked"
      ],
      "inputModes": ["text/plain", "application/json"],
      "outputModes": ["application/json"]
    },
    {
      "id": "stats",
      "name": "Index summary stats",
      "description": "Distributions, top categories, and the agent-to-agent call graph for the whole index.",
      "tags": ["stats", "rollups", "graph"],
      "examples": [
        "how many agents are reachable right now?",
        "what are the top capability clusters?",
        "license breakdown across the index"
      ],
      "inputModes": ["text/plain", "application/json"],
      "outputModes": ["application/json"]
    }
  ]
}