# Vehicle Fuel Economy Lookup

> Vehicle Fuel Economy Lookup is a paid API for AI agents from win.oneshotagent.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-25).

Look up official EPA fuel economy, annual fuel cost, electric range, and emissions data for a specific vehicle make, model, and year.

## Facts

- Endpoint: POST https://win.oneshotagent.com/v1/tools/lookup/vehicle-fuel-economy?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vehicle-fuel-economy-lookup-f5d37ee5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rbyk9q3_TbqCvnPcFd6ig

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 vehicle-fuel-economy-lookup-f5d37ee5 -d '<json body>'
```

Example prompt: What's the official EPA fuel economy and estimated annual fuel cost for a 2020 Toyota Camry with the 4-cylinder 2.5L engine?

## When to prefer this

Use this endpoint when you need official EPA fuel economy figures, annual fuel cost estimates, or emissions data for a specific vehicle. It is the authoritative source for regulatory-grade MPG, CO2, and greenhouse gas scores tied to a specific make/model/year/trim, and is ideal for purchase decisions, fleet reporting, or environmental comparisons.

## Known failure modes

- Vehicle make/model/year not found in EPA database — matched:false returned
- Ambiguous model name returns multiple options list without selecting one
- Model year outside 1984 to next calendar year range causes validation error
- Variant text doesn't match any option description — falls back to first option
- Typo in make or model causes no match

## How this service works

Look up official fuel economy, annual fuel cost, electric range and emissions for a vehicle model year.

## Output

Returns a JSON object with matched vehicle details including city/highway/combined MPG, annual fuel cost in USD, CO2 grams per mile, greenhouse gas and fuel economy scores, electric range (if applicable), fuel type, transmission, engine displacement, cylinders, drive type, vehicle class, and a list of matching trim options with their vehicle IDs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "make": {
   "type": "string",
   "description": "The vehicle make, for example Toyota. 2 to 40 characters."
  },
  "model": {
   "type": "string",
   "description": "The model as the source names it, for example Camry or Camry Hybrid LE. 1 to 60 characters."
  },
  "variant": {
   "type": "string",
   "description": "Case-insensitive text in the option description, for example 4 cyl, 2.5 L or S8; omitted selects the first option. 1 to 60 characters."
  },
  "model_year": {
   "type": "integer",
   "description": "The model year, from 1984 through next calendar year. At least 1984. Model year cannot be later than next year."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "make": "Toyota",
  "year": 2020,
  "drive": "Front-Wheel Drive",
  "model": "Camry",
  "matched": true,
  "options": [
   {
    "vehicle_id": 42011,
    "description": "Auto (S8), 6 cyl, 3.5 L"
   },
   {
    "vehicle_id": 42015,
    "description": "Auto (S8), 4 cyl, 2.5 L"
   }
  ],
  "city_mpg": 29,
  "cylinders": 4,
  "fuel_type": "Regular Gasoline",
  "updated_on": "2019-11-08",
  "vehicle_id": 42015,
  "highway_mpg": 41,
  "combined_mpg": 34,
  "transmission": "Automatic (S8)",
  "vehicle_class": "Midsize Cars",
  "co2_grams_per_mile": 264,
  "fuel_economy_score": 8,
  "displacement_liters": 2.5,
  "fuel_type_secondary": null,
  "annual_fuel_cost_usd": 1900,
  "electric_range_miles": null,
  "greenhouse_gas_score": 8,
  "combined_kwh_per_100_miles": null,
  "five_year_cost_vs_average_usd": 2000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vehicle-fuel-economy-lookup-f5d37ee5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from win.oneshotagent.com](https://www.zero.xyz/host/win.oneshotagent.com/llms.txt)