Build on Joulo
OCPP gateway and REST API • everything you need to integrate charger data into your own systems.
curl -H "Authorization: Bearer YOUR_TOKEN" \
https://api.joulo.nl/functions/v1/api/sessions- MID kWh this year
- •
- MID-kWh in 2026
- Auto connected
- •
- auto connected
Tools
Your full toolkit
OCPP Connection
Connect any OCPP 1.6J charger to Joulo. Automatic session tracking, realtime meter values and error monitoring.
REST API
Fetch charging data, sessions and ERE credits via our REST API. Including Home Assistant integration.
Home Assistant
Copy-paste YAML for sensors, lovelace and automations. No add-on, no HACS.
Register an integration
Do you build chargers? Register your integration • cloud API, OCPP 1.6J or through your back-office. We validate the sessions and add the brand.
Platform Status
Realtime status of all Joulo services: OCPP gateway, API, dashboard and more.
Developer Docs
Full documentation: quickstart, authentication, concepts, guides and complete API reference.
status.joulo.nl
Realtime status and uptime monitoring of all Joulo services.
Use Cases
What can you build?
Multi-backend architecture
Send charging data to Joulo for ERE credits and to your own energy management or analytics platform simultaneously.
Home Assistant & home automation
Integrate charger data into your smart home. Use our REST API to push data to your own systems.
CPO & installer platform
Manage a fleet of chargers via OCPP and offer your customers automatic ERE registration through the Joulo platform.
Build custom integrations
Use the REST API to build dashboards, reports or notifications on top of Joulo data.
Start building
Create a free account, connect your charger and fetch your first data.
Related pages
OCPP connection
Connect any OCPP 1.6J charger to Joulo.
OCPP API
OCPP WebSocket integration and configuration.
Home Assistant
Sensors, lovelace and automations via the REST API.
Platform status
Realtime status of all Joulo services.
Developer Docs
Quickstart, authentication, guides and REST API reference.
status.joulo.nl
Realtime status of all Joulo services.
Ready to get started?
Create a free account and connect your charger. Find your API token directly in the dashboard.