{
  "hint": "This endpoint speaks A2A over JSON-RPC 2.0 on POST.",
  "agentCard": "https://api.luniumpay.com/.well-known/agent-card.json",
  "example": {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "message/send",
    "params": {
      "message": {
        "role": "user",
        "kind": "message",
        "messageId": "1",
        "parts": [
          {
            "kind": "data",
            "data": {
              "skill": "lunium_verify_pix_payment",
              "input": {
                "e2e": "E..."
              }
            }
          }
        ]
      }
    }
  }
}