---
title: "Write Trace Event"
method: POST
path: "/v1/sessions/internal/trace"
tags: ["sessions"]
---

# Write Trace Event

`POST /v1/sessions/internal/trace`

Fire-and-forget trace event from the agent. Internal-secret auth only.

## Request body

- TraceEventPayload
  - `id` string, required
  - `session_id` string, nullable
  - `room_name` string, nullable
  - `turn_id` integer, nullable
  - `sequence` integer, required
  - `parent_id` string, nullable
  - `event_type` string, required
  - `phase` string, nullable
  - `data` object, nullable
  - `latency_ms` integer, nullable
  - `model` string, nullable
  - `input_tokens` integer, nullable
  - `output_tokens` integer, nullable
  - `outcome` string, nullable
  - `failure_mode` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/roxels/apis/interviewer.md) · [All operations](https://skmtc.dev/roxels/apis/interviewer/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/roxels/interviewer/revisions/4ef48ed226e1/schema)