EV Charging APIs: A Practical Developer Guide
Learn how to scope an EV charging integration, distinguish station data from vehicle telemetry and control, and build a workflow that handles uncertainty.
6 min readThe EV charging API resource
POWEREVERYCONNECTION.
Make sense of charging stations, vehicle data, and battery intelligence. Practical resources for the people connecting electric mobility.
Station dataVehicle telemetryOpen standards
Station dataExample record
{
"connector": "CCS",
"rated_power_kw": 150,
"status": "available"
}CHARGING STATION DATABATTERY INTELLIGENCEOCPP & OCPIDEVELOPER GUIDES
Explore the ecosystem
ONE ECOSYSTEM.
MANY CONNECTIONS.
Start with the data you need. Find a practical path through station information, vehicle integrations, and battery signals.
01
Charging station data
Locations, connectors, access details, and availability: understand the data behind a useful charging experience.
Explore the guide02
Electric car integrations
Connect the individual vehicle experience: charging state, user permissions, and useful trip context.
Explore the guide03
Tesla charging APIs
Navigate official Tesla resources, vehicle authorization, and the boundaries of charging data access.
Explore the guide04
Device battery data
Understand browser and native battery signals, capability detection, and privacy-minded fallbacks.
Explore the guide05
Car battery telemetry
Read state of charge, power, energy, and timestamps without mixing distinct battery measurements.
Explore the guide06
Battery intelligence
Create a consistent foundation for charge state, units, data provenance, and measurement quality.
Explore the guideUnderstand the data
THE RIGHT DATA.
THE RIGHT LAYER.
Great charging experiences start with knowing what an observation means, where it comes from, and what it can help someone decide.
01
Discover the place.
Locations, equipment, connector types, and access information.
02
Understand the state.
Reported battery levels, charging status, and observation times.
03
Connect the workflow.
Permissions, session lifecycles, requests, and confirmed outcomes.
A clearer data model.
Explore a normalized, illustrative JSON record.
{
"location_id": "location_demo_01",
"evse_id": "evse_demo_01",
"connector_standard": "CCS",
"rated_power_kw": 150,
"status": "available",
"observed_at": "2026-09-01T10:30:00Z"
}{
"subject_id": "vehicle_demo_01",
"state_of_charge_pct": 68,
"charging_power_kw": 42.5,
"source": "illustrative_vehicle_feed",
"observed_at": "2026-09-01T10:30:00Z",
"is_estimate": false
}{
"session_id": "session_demo_01",
"state": "charging",
"energy_delivered_kwh": 12.4,
"started_at": "2026-09-01T10:10:00Z",
"observed_at": "2026-09-01T10:30:00Z",
"command_outcome": "not_requested"
}Illustrative data · no live connection
From idea to integration
BUILD WITH A
CLEARER PICTURE.
01 / DEFINE
Choose the data.
Start with your user’s decision. Separate public station information from authorized vehicle data and operational controls.
Start with the essentials02 / EVALUATE
Verify the source.
Check coverage, permissions, field definitions, freshness, and usage terms against the requirements of your application.
Evaluate an API03 / CONNECT
Plan for real conditions.
Handle missing readings, interrupted sessions, and uncertain outcomes before they reach the people relying on your product.
Use the integration checklistThe Charge Journal
LESS GUESSWORK.
MORE UNDERSTANDING.
OCPP vs OCPI: Which Protocol Does Your Project Need?
Understand where OCPP and OCPI belong, how charger operations connect to roaming services, and what to verify before choosing an integration architecture.
6 min read
Charger Availability Data: From Status Codes to Useful Decisions
Turn charger status updates into useful availability information with clear freshness rules, correct EVSE counts, reliable ingestion, and honest driver messaging.
6 min readA few useful answers
BEFORE YOU
CONNECT.
Get your bearings, then explore the guide that fits your project.
Have a different question?What is a charge API?
A charge API is an interface for exchanging charging or battery information. Depending on its scope, it may expose charging locations, vehicle telemetry, session records, or permitted controls. The first step is choosing which of those capabilities your application actually needs. Start with our EV charging API guide.
Is charging station data the same as live availability?
No. A station directory describes places and equipment. Availability describes an observed state, at a particular level and time. A station can be listed while its current connector status remains unknown. Our availability guide explains how to handle that distinction.
How do OCPP and OCPI fit together?
OCPP connects charging stations and their management systems. OCPI supports exchanges between parties in the charging ecosystem. They have different roles; an integration may involve one, both, or neither. Read the OCPP and OCPI comparison for a practical starting point.
Where should I start with Tesla charging data?
Start with the exact use case and Tesla’s official developer requirements. Authorized vehicle data, charging records, and public station information should be evaluated separately. The Tesla charging API guide maps the important access boundaries.
Can I obtain API keys from ChargeAPI.com?
ChargeAPI.com publishes guides and educational examples. Obtain production credentials directly from the provider whose service you plan to use. Our developer resources help you evaluate data, permissions, and integration behavior before connecting.
Do battery APIs work on every device?
No. Device and browser support varies, and vehicle integrations have their own access requirements. Detect supported capabilities and design for missing readings. See the device battery API guide for a useful fallback strategy.
Let’s connect