MCP Server - Trace propagation

[betegon]

Use the _meta field in JSON-RPC messages for it. more on that in the OTEL MCP draft spec.

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "get-weather",
    "_meta": {
      "traceparent": "00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01",
      "tracestate": "rojo=00f067aa0ba902b7,congo=t61rcWkgMzE"
    }
  },
  "id": 1,
}

[linear]

JS-768 MCP Server - Trace propagation