Geofencing API for last-mile delivery in France

French delivery operations — from La Poste's parcel network to Chronopost's express courier fleet to the quick-commerce and food-delivery platforms operating in dense city centers like Paris and Lyon — all depend on the same underlying signal: knowing precisely when a courier crosses into a delivery zone, not approximately.

Fencemaker provides that as a dedicated trigger layer. Define delivery zones as polygons matching real arrondissement or delivery-district boundaries, and a webhook fires the instant a tracked device enters, exits, or dwells in a zone.

Why this matters for French delivery operations

CNIL enforcement is active, not theoretical. France's data protection authority has a well-established track record of enforcing GDPR retention and purpose-limitation rules on location data specifically. Self-hosted deployment means your retention policy is a decision you make, not a vendor's default term.

Dense, mixed delivery zones need real precision. Paris-style urban density means polygon-based zones, not radius approximations, are the difference between accurate triggers and false positives from an adjacent building.

How the trigger flow works

POST https://your-app.com/webhooks/fencemaker
{
  "event": "geofence.enter",
  "zone_id": "zone_le_marais_hub",
  "device_id": "livreur_2290",
  "timestamp": "2026-08-18T11:20:15Z",
  "coordinates": { "lat": 48.8589, "lng": 2.3611 }
}

Route that event to Slack, Telegram, or straight into your dispatch platform.

What you get out of the box

Polygon-based zone definitions for precise coverage of dense urban delivery areas
Native Slack and Telegram webhook delivery
Dwell-time detection for stalled or delayed drops
Self-hosted deployment, keeping location data under your control for CNIL/GDPR compliance
An ops portal for managing zones without engineering involvement

If your delivery stack is approximating zone detection today, Fencemaker replaces that with infrastructure built specifically for reliable, high-density delivery triggers.