Agentropolis

{
  "name": "Agentropolis",
  "description": "Search engine for agent-usable tools: MCP servers, x402/MPP paid APIs, A2A agents and kits, with payment-verified trust scores and honest badges (Verified, Live-Tested, Trusted auto-computed; Agentropolis Pro is a labelled paid tier, coming soon; see /api/v1/badges). Read-only; never pays on your behalf.",
  "url": "https://agentropolis.io/a2a",
  "version": "0.1.0",
  "documentationUrl": "https://agentropolis.io/llms.txt",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "authentication": {
    "schemes": [
      "none"
    ]
  },
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json",
    "text/plain"
  ],
  "skills": [
    {
      "id": "find_kits",
      "name": "Find tools for a task",
      "description": "Natural-language search over MCP servers, paid APIs and kits. Send the task as text. Results carry badge tiers; a labelled \"featured\" (Agentropolis Pro) row is returned separately.",
      "tags": [
        "search",
        "discovery",
        "mcp",
        "x402",
        "mpp"
      ],
      "examples": [
        "find a web search API under $0.01",
        "MCP server for Postgres"
      ]
    },
    {
      "id": "call_kit",
      "name": "Call an x402 kit (non-custodial pass-through)",
      "description": "Send a data part {\"skill\":\"call_kit\",\"id\":\"<listing id>\",\"endpoint\":\"/path\",\"method\":\"POST\",\"body\":{...}}. A 402 returns the seller's payment requirements unchanged; pay the seller from your own wallet and resend with \"payment_signature\" (x402 v2) or \"x_payment\" (v1). No custody, no fees.",
      "tags": [
        "x402",
        "relay",
        "payments"
      ]
    },
    {
      "id": "get_kit",
      "name": "Get kit manifest",
      "description": "Send JSON {\"skill\":\"get_kit\",\"id\":\"<listing id>\"} to get a kit.json v0.1 manifest.",
      "tags": [
        "manifest"
      ]
    }
  ],
  "protocolVersion": "0.3.0",
  "preferredTransport": "JSONRPC"
}