oanor
Sign up free
Marketplace Pricing Features Sign in

API · /fueleconomy-api

FuelEconomy.gov API

degraded 3,948 Subscribers

Official US vehicle fuel-economy data as an API, powered by FuelEconomy.gov — the joint US EPA and Department of Energy resource behind the fuel-economy window sticker on every car, SUV and truck sold in the United States since 1984. Browse the catalogue step by step — model years, then makes, then models, then the engine/transmission trims (each carrying the vehicle id you need for the detail call) — and pull a vehicle's complete fuel-economy record: city, highway and combined MPG, fuel type, engine (number of cylinders and displacement), transmission, EPA vehicle class and drivetrain, the estimated annual fuel cost, tailpipe CO2 emissions in grams per mile, the barrels of petroleum consumed per year and the estimated five-year fuel-cost saving (or extra spend) versus an average new vehicle. Ideal for car-shopping and comparison tools, total-cost-of-ownership and emissions calculators, fleet management and sustainability reporting. The data is authoritative, official EPA/DOE test data and is public domain; it covers US-market light-duty vehicles. Vehicle ids come from the trims endpoint, reached via the year -> make -> model -> trim chain.

#fueleconomy #mpg #vehicles #epa #emissions #automotive #government-data
api.oanor.com/fueleconomy-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/fueleconomy-api/openapi.json
/api/fueleconomy-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

degraded
Uptime
87.50%
Server probes · 24h
Avg latency
377 ms
Server probes · 24h
Subscribers
3,948
active
Total calls
18
last 7 days
status Full status page → · 48 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 600 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 600 calls/month
  • 2 req/sec
  • Browse & full vehicle records
  • No credit card
Sign in to subscribe

Starter

€7.20 /month

  • 22,300 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 22.3k calls/month
  • 6 req/sec
  • MPG & emissions data
  • Email support
Sign in to subscribe

Pro

€21.80 /month

  • 93,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 93k calls/month
  • 15 req/sec
  • Cost & TCO calculators
  • Priority support
Sign in to subscribe

Mega

€60.50 /month

  • 410,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 410k calls/month
  • 40 req/sec
  • Fleet & sustainability
  • Dedicated SLA
Sign in to subscribe

Built by

P
PremiumApi

Related APIs

Other APIs with overlapping tags.

Cars / VIN API

Decode any Vehicle Identification Number (VIN) into make, model, year, body class, engine, fuel type, drivetrain and plant — and browse vehicle makes and models by type and year. Powered by the official NHTSA vPIC database.

api.oanor.com/cars-api

Greenhouse Gas Emissions API

Independent greenhouse-gas emissions data as an API — powered by Climate TRACE, the coalition (backed by Al Gore) that monitors global emissions from satellites, sensors and AI rather than self-reported figures. Get any country's emissions for a given year — CO2, methane (CH4) and nitrous oxide (N2O) in tonnes, plus CO2-equivalent over 100- and 20-year horizons — together with the country's global emissions rank and its share of total world emissions; pass several countries at once to compare them side by side. List the full set of sectors, subsectors and gases that Climate TRACE tracks (power, transportation, manufacturing, agriculture, fossil-fuel operations, waste and more). From China and the United States to any nation on Earth, with data from 2015 onward, it is ideal for climate, ESG, sustainability, policy, journalism and research applications. An independent emissions-inventory data source — distinct from electricity-grid carbon intensity, activity footprint calculators and climate classification. Open data from Climate TRACE (CC BY 4.0).

api.oanor.com/climatetrace-api

Carbon Footprint API

Estimate CO2e emissions for everyday activities using the official DEFRA 2023 GHG conversion factors: road and rail travel (per kilometre by vehicle type, split across passengers), flights (by airport IATA pair with great-circle distance, or by distance, across cabin classes and round trips), grid electricity (by kilowatt-hour and country carbon intensity) and direct fuel combustion (by litres and fuel type). A factors endpoint exposes every emission factor, supported vehicle and fuel type, and the country grid-intensity table. Each result returns CO2e in kilograms, tonnes and grams. Every endpoint accepts input via the query string or the request body and returns lean JSON. Pure server-side compute (no third-party upstream), so responses are instant and always available. Ideal for travel and booking flows, sustainability dashboards, ESG and Scope-3 reporting, and carbon-aware product features.

api.oanor.com/carbonfootprint-api

Vehicle Database API

Decode any Vehicle Identification Number (VIN) into a full, structured vehicle specification — make, manufacturer, model, year, trim, series, body class, vehicle type, drive type, doors, engine (cylinders, displacement, horsepower, configuration and primary/secondary fuel), transmission style, gross vehicle weight rating and the manufacturing plant (country, city, state, company). Partial VINs with wildcards are supported and an optional model year improves accuracy. The API also lists every vehicle make (optionally for a vehicle type such as car, truck or motorcycle) and all models for a given make and year. Backed by the official NHTSA vPIC database, with clean, predictable JSON and no raw-data wrangling. Every endpoint accepts input via the query string or the request body. Ideal for automotive marketplaces, insurance and fleet tools, dealer and parts catalogues, and vehicle-registration flows.

api.oanor.com/vehicledb-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for FuelEconomy.gov API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call FuelEconomy.gov API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for FuelEconomy.gov 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 FuelEconomy.gov API cost?
FuelEconomy.gov API has a free tier with 100 calls / month. Paid plans start at €7.20 / 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 FuelEconomy.gov API GDPR-compliant?
All requests to FuelEconomy.gov 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/fueleconomy-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/fueleconomy-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/fueleconomy-api/SOME_PATH");
curl_setopt($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/fueleconomy-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

Ratings

Sign in to rate.

No reviews yet.

Discussion

Ask questions, share usage tips, get answers from the provider and other developers. Public — anyone can read.

Sign in to start a thread or reply.

Sign in

New thread

/ 4000

📌 Pinned 🔒 Locked

·

· ·

/ 4000

🔒 This thread is locked — no new replies.

  • No threads yet — start the discussion.

Support

Private 1:1 support with the provider — billing questions, integration issues, account problems. Only you and the provider team can see these threads.

Sign in to open a support ticket.

Sign in

Open new ticket

Describe what you need help with. The provider team gets an email and replies on the ticket page.

  • No tickets yet for this API.

Subscription active — calls can start immediately.

Send your first request —

Subscription active — copy a snippet and fire off your first call.