Geofencing API for field service and fleet territory alerts in the UK

UK field-service operations — utility engineers, home-service dispatch, regional sales and delivery fleets — need to know reliably whether a technician or vehicle has actually reached an assigned postcode area or job site, not just approximately nearby. Manual arrival confirmation doesn't scale, and generic mapping SDKs weren't built for territory-based accountability specifically.

Fencemaker fills that gap as a dedicated trigger layer. Define service territories or job-site zones as polygons, and a webhook fires the instant a tracked device enters, exits, or dwells.

Why this matters for UK field-service operations

Postcode-level precision matters. UK service territories are often defined by tightly packed postcode boundaries — polygon zones let you match those boundaries exactly, avoiding the false triggers a radius-based approach produces in dense areas.

UK GDPR and the Data Protection Act 2018 govern location tracking. Employee and fleet location data carries real compliance weight. Self-hosted deployment means retention and processing policy stay under your direct control.

How the trigger flow works

POST https://your-app.com/webhooks/fencemaker
{
  "event": "geofence.exit",
  "zone_id": "zone_service_area_manchester_m1",
  "device_id": "engineer_3390",
  "timestamp": "2026-08-18T13:45:00Z",
  "coordinates": { "lat": 53.4808, "lng": -2.2426 }
}

Route that event to Slack, Telegram, or directly into your field-service management system.

What you get out of the box

• Polygon-based territory definitions matching postcode-level service boundaries
• Native Slack and Telegram webhook delivery
• Dwell-time detection for flagging jobs running long or vehicles stalled unexpectedly
• Self-hosted deployment for full data control
• An ops portal for managing territories without engineering involvement

If your field team currently relies on manual arrival confirmation, Fencemaker replaces that with automated, verifiable territory tracking built for the density of UK service areas.