---
title: "Start Session"
method: POST
path: "/activity-tracking/session/start"
tags: ["activity-tracking"]
---

# Start Session

`POST /activity-tracking/session/start`

Start or resume a user session.
This endpoint is public to allow tracking before user authentication.

Sync (def, not async def) so FastAPI runs it in its threadpool — body is
sync DB work (no awaits) and the client doesn't consume the response
body, just response.ok. Frees the event loop for call/WS traffic.

## Request body

- SessionCreateRequest
  - `session_id` string, required
  - `user_id` string, nullable
  - `device_fingerprint` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/fluentea/apis/aurqa-language-learning-platform-refactored.md) · [All operations](https://skmtc.dev/fluentea/apis/aurqa-language-learning-platform-refactored/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/fluentea/aurqa-language-learning-platform-refactored/revisions/78f314acd8bf/schema)