---
title: "Webhook Tracking Session Geofence Entered"
method: POST
path: "tracking.session.geofence_entered"
---

# Webhook Tracking Session Geofence Entered

`POST tracking.session.geofence_entered` (webhook)

Sent the first time a session's tracker is observed inside a geofence.

## Payload

- TrackingSessionGeofenceEnteredWebhookPayload
  - `event_type` 'tracking.session.geofence_entered'
  - `event_timestamp` string, date-time, required — UTC timestamp when the event occurred
  - `session_id` string, required — The tracking session whose tracker entered a geofence
  - `geofence_id` string, uuid4, required — The geofence that the tracker entered
  - `geofence_display_name` string, required — The display name of the geofence that the tracker entered

## Acknowledgement `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/chrt/apis/chrt-fastapi.md) · [All operations](https://skmtc.dev/chrt/apis/chrt-fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/chrt/chrt-fastapi/revisions/ea04e157edb3/schema)