POST /runtime/execute

{
  "input": { "action": "api_call", "resource": "url", "agent": "ops-bot" },
  "execution": {
    "mode": "http_proxy",
    "method": "GET",
    "url": "https://api.example.com/data",
    "headers": { "accept": "application/json" },
    "body": null
  },
  "approval_id": "optional"
}

{
  "input": { "action": "search", "agent": "bot", "tool": "search_documents" },
  "execution": {
    "mode": "mcp_proxy",
    "server": "analytics",
    "tool": "search_documents",
    "arguments": { "query": "report" }
  }
}