# Polyform Vehicle Fuel Economy Lookup

> Polyform Vehicle Fuel Economy Lookup is a paid API for AI agents from polyform.polyform-org.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Returns EPA MPG figures and estimated annual fuel cost for a specific vehicle year, make, and model from fueleconomy.gov

## Facts

- Endpoint: GET https://polyform.polyform-org.workers.dev/v1/vehicle/fuel-economy
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polyform-vehicle-fuel-economy-lookup-528073d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xu74_r3zZoXMZqPsFsylX

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 polyform-vehicle-fuel-economy-lookup-528073d9
```

Example prompt: What are the EPA city, highway, and combined MPG figures and the estimated annual fuel cost for a 2022 Toyota RAV4?

## When to prefer this

Use this endpoint when you need official US government EPA MPG figures and standardized annual fuel cost estimates for a specific passenger vehicle. Prefer this over general web search when you need structured, machine-readable fuel economy data from fueleconomy.gov that can be compared programmatically across vehicles.

## Known failure modes

- Vehicle year/make/model combination not found in fueleconomy.gov database — returns empty or error response
- Ambiguous model name matching multiple trims — may return multiple results or require more specific input
- Very new or prototype vehicles may not yet have EPA ratings in the database
- Older pre-1984 vehicles may have incomplete or missing data

## How this service works

EPA MPG figures and estimated annual fuel cost for a year/make/model. Source: fueleconomy.gov. JSON.

## Output

A JSON object containing EPA official fuel economy data for the requested vehicle: city MPG, highway MPG, combined MPG, and an estimated annual fuel cost in USD, sourced from fueleconomy.gov.

## 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polyform-vehicle-fuel-economy-lookup-528073d9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polyform.polyform-org.workers.dev](https://www.zero.xyz/host/polyform.polyform-org.workers.dev/llms.txt)