Perhaps I need to see the HTTP header information in the Trace logs.

[micookie2]

When I use plexus to forward claude code requests,
as shown in the figure, the upstream provide returns an exception, but plexus seems to treat it as a normal request, converting it into a normal end turn, leading to no further actions from Claude code.

I want to check the upstream http response header, but there is no way to view it.

I plan to modify the Trace log structure so that not only can I see the http body, but also the header.

Please take a look and see if it's feasible? @mcowger

[mcowger]

Please provide the full trace - there are handy copy buttons provided so that screen shots aren't needed.

[micookie2]

I got the data from Postgres.
A conversion exception only occurs when the provide field of raw_response returns the error code 10010, while other error codes such as 10012 indicate normal conversion.
The abnormal data is shown below.

bad request

raw_request

{"model":"claude-opus-4-7","messages":[{"role":"user","content":[{"type":"text","text":"....."}},"required":["query","libraryName"],"$schema":"http://json-schema.org/draft-07/schema#"}}],"metadata":{"user_id":"{\"device_id\":\"12ee751528faa6fea779264c9eb10584212f14717d031569e9f8bda5d9980550\",\"account_uuid\":\"\",\"session_id\":\"70c355b4-96de-4dc7-8ff4-1ef05e2b89bb\"}"},"max_tokens":64000,"thinking":{"type":"adaptive"},"context_management":{"edits":[{"type":"clear_thinking_20251015","keep":"all"}]},"output_config":{"effort":"high"},"stream":true}

raw_respose:

data: {"error":{"code":10010,"message":"Xunfei request failed with Sid: cht000be59a@dx19e4450fc51b992700 code: 10010, msg: RecvFromEngineError:Engine Busy, timeStamp:15:39:00.536"}}

transformed_response

event: message_startdata: {"type":"message_start","message":{"id":"msg_1779262739823","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":0,"output_tokens":0,"thinkingTokens":0,"cache_read_input_tokens":0,"cache_creation_input_tokens":0}}}event: message_deltadata: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":0,"output_tokens":0,"thinkingTokens":0,"cache_read_input_tokens":0,"cache_creation_input_tokens":0}}event: message_stopdata: {"type":"message_stop"}

raw_response_snapshot

{"error":{"code":10010,"message":"Xunfei request failed with Sid: cht000be59a@dx19e4450fc51b992700 code: 10010, msg: RecvFromEngineError:Engine Busy, timeStamp:15:39:00.536"}}

transformed_response_snapshot

{"id":"msg_1779262739823","type":"message","role":"assistant","content":[],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":0,"output_tokens":0,"thinkingTokens":0,"cache_read_input_tokens":0,"cache_creation_input_tokens":0}}

[micookie2]

@mcowger Sorry, I clicked the wrong button and accidentally closed this issue. Please reopen it.

[micookie2]

i see the Copy ALL buton.

{
  "requestId": "68443006-0abf-4e64-8ee4-643cd9a999d4",
  "createdAt": 1779350398408,
  "rawRequest": {
    "model": "claude-opus-4-7",
    "messages": ["..."],
    "system": ["..."],
    "tools": [
  
    ],
    "metadata": {
      "user_id": "{\"device_id\":\"12ee751528faa6fea779264c9eb10584212f14717d031569e9f8bda5d9980550\",\"account_uuid\":\"\",\"session_id\":\"4551bb8e-bf64-4011-bcc8-c21a2a642da3\"}"
    },
    "max_tokens": 64000,
    "thinking": {
      "type": "adaptive"
    },
    "context_management": {
      "edits": [
        {
          "type": "clear_thinking_20251015",
          "keep": "all"
        }
      ]
    },
    "output_config": {
      "effort": "high"
    },
    "stream": true
  },
  "rawResponse": "data: {\"error\":{\"code\":10012,\"message\":\"Xunfei request failed with Sid: cht000bec7d@dx19e498c6a03b9d8700 code: 10012, msg: EngineInternalError:error, status code: 400, status: 400 Bad Request, message: Invalid content type. image_url is only supported by certain models, timeStamp:16:00:01.618\"}}\n\n",
  "rawResponseSnapshot": {
    "error": {
      "code": 10012,
      "message": "Xunfei request failed with Sid: cht000bec7d@dx19e498c6a03b9d8700 code: 10012, msg: EngineInternalError:error, status code: 400, status: 400 Bad Request, message: Invalid content type. image_url is only supported by certain models, timeStamp:16:00:01.618"
    }
  },
  "transformedResponse": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"id\":\"msg_1779350400833\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"usage\":{\"input_tokens\":0,\"output_tokens\":0,\"thinkingTokens\":0,\"cache_read_input_tokens\":0,\"cache_creation_input_tokens\":0}}}\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null},\"usage\":{\"input_tokens\":0,\"output_tokens\":0,\"thinkingTokens\":0,\"cache_read_input_tokens\":0,\"cache_creation_input_tokens\":0}}\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"}\n\n",
  "transformedResponseSnapshot": {
    "id": "msg_1779350400833",
    "type": "message",
    "role": "assistant",
    "content": [],
    "stop_reason": "end_turn",
    "stop_sequence": null,
    "usage": {
      "input_tokens": 0,
      "output_tokens": 0,
      "thinkingTokens": 0,
      "cache_read_input_tokens": 0,
      "cache_creation_input_tokens": 0
    }
  }
}

[stargazer33]

I want to check the upstream http response header, but there is no way to view it.

This is exactly my case: there is no HTTP error code, and I am looking at traces, see screenshot

I know, the upstream provider returned some garbage with normal HTTP response code, and I am talking to provider, and I want to point him to this particular response, and I know this provider RETURNS x-request-id HTTP header, and I can not find it in Plexus!
Please add some way to view HTTP response headers for normal upstream provider responses.

Thanks in advance!

[mcowger]

/pi come up with a PR to record response headers when tracing is enabled, and record them into the debug traces. Add a headers disclosure to show that on the Debug Logs page and include them in the "copy all".

[github-actions]

🤖 Pi Action | GitHub Actions Run | Model: openrouter/moonshotai/kimi-k2.6 | Started: Thu, 21 May 2026 14:26:00 GMT

Done. PR opened: #515

What changed

Backend

• Added responseHeaders to the debug_logs schema (SQLite & Postgres).
• The dispatcher now calls DebugManager.addResponseHeaders() for both streaming and non-streaming upstream responses, using the existing extractResponseHeaders() helper.
• DebugManager and UsageStorageService store/retrieve the headers alongside existing trace fields.

Frontend

• New Response Headers accordion on the Debug Logs detail page (yellow header, with fold/unfold and copy).
• Headers are included in Copy All and Download exports.

Validation

• bun run format:check passes.
• All backend tests pass (404 tests).
• Frontend build succeeds.

[micookie2]

I compiled and ran the PR #518 locally and identified the root cause of my issue.

The upstream LLM Provider returned an HTTP status code 200, yet the response body contained an error message.

raw Respose:

{
  "status": 200,
  "headers": {
    "cache-control": "no-cache",
    "connection": "keep-alive",
    "content-type": "text/event-stream",
    "date": "Fri, 22 May 2026 09:39:13 GMT",
    "transfer-encoding": "chunked",
    "via": "kong/1.3.0",
    "x-kong-proxy-latency": "1",
    "x-kong-upstream-latency": "120764",
    "x-oneapi-request-id": "2026052217371279693508696366970"
  },
  "body": {
    "error": {
      "code": 10010,
      "message": "Xunfei request failed with Sid: cht000efc68@dx19e4f0bc9c2b9d8412 code: 10010, msg: RecvFromEngineError:Engine Busy, timeStamp:17:39:13.414"
    }
  }
}

Plexus Transformed Response:

{
  "id": "msg_1779442752292",
  "type": "message",
  "role": "assistant",
  "content": [],
  "stop_reason": "end_turn",
  "stop_sequence": null,
  "usage": {
    "input_tokens": 0,
    "output_tokens": 0,
    "thinkingTokens": 0,
    "cache_read_input_tokens": 0,
    "cache_creation_input_tokens": 0
  }
}