# FuelEconomy.gov EPA Ratings Lookup

> FuelEconomy.gov EPA Ratings Lookup is a paid API for AI agents from api.companyrecords-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Returns EPA fuel economy ratings (combined, city, highway MPG), fuel type, drive type, and CO2 tailpipe emissions for a specific vehicle make, model, and year from FuelEconomy.gov.

## Facts

- Endpoint: GET https://api.companyrecords-api.workers.dev/api/gov/fueleconomy-gov?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fueleconomy-gov-epa-ratings-lookup-ac12adea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DthMN_ifduGDF8r-Mr_ja

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fueleconomy-gov-epa-ratings-lookup-ac12adea
```

Example prompt: What are the official EPA fuel economy ratings for a 2024 Toyota Camry — city, highway, and combined MPG, plus CO2 emissions?

## When to prefer this

Use this endpoint when you need official US EPA fuel economy data (city, highway, combined MPG) and CO2 tailpipe emissions for a specific vehicle by year, make, and model. It is the authoritative source for government-certified fuel economy figures, making it ideal for vehicle research, fleet management, emissions reporting, and consumer comparison tools. Prefer this over web scraping or third-party automotive APIs when accuracy and official government data are required.

## Known failure modes

- No matching vehicle found for the given year/make/model combination — returns empty vehicles array
- Invalid or unsupported model year returns an error or empty result
- Misspelled make or model name results in no matches
- Upstream FuelEconomy.gov API unavailable causes request failure
- Rate limiting or payment failure ($0.002 USDC per call) if x402 payment is not properly handled

## How this service works

Pay-per-call company registry, government, legal and B2B data tools for AI agents, from official registers and public sources. Payment: x402, USDC on Base, Solana, Arc, Polygon, Arbitrum, Monad, World Chain, Optimism, Avalanche, Celo or Stellar, or RLUSD/XRP on the XRP Ledger. No signup, no API key; a failed call is not charged.

## Output

A JSON object containing the queried make, model, and year, plus an array of matching vehicles each with: vehicle ID, city/highway/combined MPG, fuel type (e.g. Regular Gasoline), drive type (e.g. Front-Wheel Drive), transmission, and CO2 tailpipe grams per mile. Source URL and timestamp are also included. Up to 3 vehicles returned per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "year",
      "make",
      "model"
     ],
     "properties": {
      "make": {
       "type": "string",
       "description": "Make, e.g. Toyota"
      },
      "year": {
       "type": "string",
       "description": "Model year, 4 digits, e.g. 2024"
      },
      "model": {
       "type": "string",
       "description": "Model, e.g. Camry"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "make": "Toyota",
  "year": 2024,
  "model": "Camry",
  "source": "https://www.fueleconomy.gov/ws/rest/vehicle/menu/options",
  "vehicles": [
   {
    "id": 47085,
    "make": "Toyota",
    "year": 2024,
    "label": "Auto (S8), 6 cyl, 3.5 L",
    "model": "Camry",
    "mpgCity": 22,
    "fuelType": "Regular Gasoline",
    "driveType": "Front-Wheel Drive",
    "mpgHighway": 33,
    "mpgCombined": 26,
    "transmission": "Automatic (S8)",
    "co2GramsPerMile": 338
   }
  ],
  "checkedAt": "2026-10-23T09:37:15.357Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fueleconomy-gov-epa-ratings-lookup-ac12adea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.companyrecords-api.workers.dev](https://www.zero.xyz/host/api.companyrecords-api.workers.dev/llms.txt)