Charge time between two states of charge
API · /evcharging-api
EV Charging API
healthy
3,219 Subscribers
Electric-vehicle charging maths as an API, computed locally and deterministically — the three numbers every EV driver and charging app actually needs. The charge-time endpoint gives how long a session takes: from the battery size and the gap between the starting and target state of charge it works out the energy to add and the time at a given charger power and efficiency — a 60 kWh battery from 20 % to 80 % on a 7.2 kW home charger at 90 % efficiency takes about 5.6 hours, and it reminds you that DC fast charging slows sharply above 80 % so road trips should be planned around the fast part of the curve. The range-added endpoint turns a charging session into miles: from the charger power, the minutes plugged in and the car's miles per kWh it gives the energy and range added, plus the handy "miles per hour of charging" figure — a 7 kW home charger adds roughly 22 mi/hr, a 150 kW DC station hundreds. The cost endpoint gives what a charge costs, correctly billing the energy drawn from the grid (the energy to the battery divided by the charging efficiency) times the price per kWh, with the effective cost per usable kWh — home overnight rates make EV miles very cheap while DC fast chargers cost several times more. Everything is computed locally and deterministically, so it is instant and private. Ideal for EV apps, route and trip planners, fleet and charging-station tools, charge-cost calculators and dashboards. Pure local computation — no key, no third-party service, instant. Estimates — real DC charging tapers above 80 % and cold weather cuts range. 3 compute endpoints. For battery runtime use a battery API; for generic energy cost use an energy-cost API.
api.oanor.com/evcharging-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 82 ms
- Server probes · 24h
- Subscribers
- 3,219
- active
- Total calls
- 76
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 5,400 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 5,400 calls/month
- 2 req/sec
- Charge-time + range + cost
- No credit card
Starter
€12.90 /month
- 61,000 calls / month
- 6 requests / second
- Hard cap (429 above quota, no overage)
- 61,000 calls/month
- 6 req/sec
- Efficiency-aware maths, any charger
- Email support
Pro
€39.90 /month
- 249,000 calls / month
- 15 requests / second
- Hard cap (429 above quota, no overage)
- 249,000 calls/month
- 15 req/sec
- EV apps & trip-planner pipelines
- Priority support
Mega
€119.00 /month
- 1,290,000 calls / month
- 40 requests / second
- Hard cap (429 above quota, no overage)
- 1,290,000 calls/month
- 40 req/sec
- Fleet & charging-network scale
- Dedicated SLA
Built by
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api.oanor.com/exposure-api
Battery Pack API
Battery-pack design maths as an API, computed locally and deterministically — the voltage, capacity, energy, current and charge-time numbers an EV, e-bike, solar or robotics pack builder lays out a battery with. The configuration endpoint turns a series-parallel cell layout into the pack: cells in series add their voltages (the series count sets the pack voltage) and cells in parallel add their amp-hours (the parallel count sets the capacity), with the energy in watt-hours = voltage × capacity — a 13S4P pack of 3.6 V / 3.5 Ah cells is 46.8 V, 14 Ah and about 655 Wh from 52 cells, and it also reports the full-charge voltage (series × 4.2 V for Li-ion) to size the charger and BMS. The c-rate endpoint relates current to capacity both ways — give a C-rate to get the current, or a current to get the C-rate — because 1C draws or charges the whole capacity in an hour, so a 14 Ah pack at 2C is 28 A, and it returns the power if you pass the pack voltage. The charge-time endpoint gives the time to charge between two states of charge from the charge current. Everything is computed locally and deterministically, so it is instant and private. Ideal for EV and e-bike builders, solar and off-grid storage tools, robotics and drone packs, and battery-engineering apps. Pure local computation — no key, no third-party service, instant. Pack-design estimates — real cells taper on charge and sag under load. 3 compute endpoints. For runtime under a load use a battery API; for EV charging an EV-charging API.
api.oanor.com/batterypack-api
52-Week High/Low Range Screener API
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api.oanor.com/fiftytwoweek-api
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api.oanor.com/fxrange-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for EV Charging API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call EV Charging API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for EV Charging API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does EV Charging API cost?
EV Charging API has a free tier with 100 calls / month. Paid plans start at €12.90 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is EV Charging API GDPR-compliant?
All requests to EV Charging API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/evcharging-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/evcharging-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/evcharging-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/evcharging-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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