Geofencing API for last-mile delivery in Germany

German delivery operators — from established courier networks to newer quick-commerce platforms — face a geofencing requirement that looks different from most markets: the trigger infrastructure itself has to be defensible under some of the strictest data protection enforcement in the world, not just fast.

Fencemaker's answer is to run self-hosted. You deploy the geofencing engine on infrastructure you control, define delivery zones as precise polygons, and receive a webhook the instant a tracked device enters, exits, or dwells in a zone — with location data never leaving infrastructure you own.

Why this matters for German delivery operations

GDPR enforcement is not theoretical here. Location data is personal data, and German data protection authorities have a track record of enforcing retention and purpose-limitation requirements strictly. A self-hosted geofencing layer means you set the retention policy — not a SaaS vendor's default terms buried in a DPA you didn't fully negotiate.

Precision matters for dense mixed-use delivery zones. German cities mix residential, commercial, and industrial delivery points closely together. Polygon-based zones let you match actual boundaries instead of approximating with a radius that spills into adjacent buildings.

How the trigger flow works

POST https://your-app.com/webhooks/fencemaker
{
  "event": "geofence.dwell",
  "zone_id": "zone_prenzlauer_berg_hub",
  "device_id": "fahrer_3390",
  "timestamp": "2026-08-18T16:22:10Z",
  "coordinates": { "lat": 52.5391, "lng": 13.4245 }
}

Route that event to Slack or Telegram for ops visibility, or directly into your logistics platform to trigger the next workflow step automatically.

What you get out of the box

Self-hosted deployment — location data and event history stay on infrastructure you control
Polygon-based zone definitions for precise coverage of mixed-use urban delivery areas
Native Slack and Telegram webhook delivery
Dwell-time detection for flagging delayed or stalled deliveries
An ops portal for managing zones without engineering involvement

For German delivery teams weighing a hosted geofencing SaaS against the data-residency and retention questions that come with it, self-hosted is the more defensible default — and Fencemaker is built to make that the easy option rather than the hard one.