MCP live-server protocol capture
Commit: 7fab4ef97838e3e0f1b7e0e2af58d778fda059d8
Environment: Linux, real T3 server bound to loopback; fresh isolated database; scoped client bearer authentication.
Credentials and provider inventory omitted.

POST /mcp — server/discover
Request: {"jsonrpc": "2.0", "id": 1, "method": "server/discover", "params": {"_meta": {"io.modelcontextprotocol/protocolVersion": "2026-07-28", "io.modelcontextprotocol/clientCapabilities": {}, "io.modelcontextprotocol/clientInfo": {"name": "discovery-proof", "version": "1.0.0"}}}}
HTTP 400
Response: {
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32022,
    "message": "Unsupported protocol version '2026-07-28'",
    "data": {
      "supported": [
        "2025-06-18"
      ],
      "requested": "2026-07-28"
    }
  }
}

POST /mcp — tools/list
Request: {"jsonrpc": "2.0", "id": 2, "method": "tools/list", "params": {"_meta": {"io.modelcontextprotocol/protocolVersion": "2026-07-28", "io.modelcontextprotocol/clientCapabilities": {}, "io.modelcontextprotocol/clientInfo": {"name": "discovery-proof", "version": "1.0.0"}}}}
HTTP 400
Response: {
  "jsonrpc": "2.0",
  "id": 2,
  "error": {
    "code": -32022,
    "message": "Unsupported protocol version '2026-07-28'",
    "data": {
      "supported": [
        "2025-06-18"
      ],
      "requested": "2026-07-28"
    }
  }
}

POST /mcp — tools/call
Request: {"jsonrpc": "2.0", "id": 3, "method": "tools/call", "params": {"_meta": {"io.modelcontextprotocol/protocolVersion": "2026-07-28", "io.modelcontextprotocol/clientCapabilities": {}, "io.modelcontextprotocol/clientInfo": {"name": "discovery-proof", "version": "1.0.0"}}, "name": "orchestrator_capabilities", "arguments": {}}}
HTTP 400
Response: {
  "jsonrpc": "2.0",
  "id": 3,
  "error": {
    "code": -32022,
    "message": "Unsupported protocol version '2026-07-28'",
    "data": {
      "supported": [
        "2025-06-18"
      ],
      "requested": "2026-07-28"
    }
  }
}

POST /mcp — initialize
Request: {"jsonrpc": "2.0", "id": 4, "method": "initialize", "params": {"protocolVersion": "2099-01-01", "capabilities": {}, "clientInfo": {"name": "discovery-proof", "version": "1.0.0"}}}
HTTP 200
Response: {
  "jsonrpc": "2.0",
  "id": 4,
  "result": {
    "protocolVersion": "2025-06-18",
    "capabilities": {
      "logging": {},
      "tools": {
        "listChanged": true
      },
      "completions": {}
    },
    "serverInfo": {
      "name": "T3 Code",
      "version": "0.1.9"
    }
  }
}