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Polyform Vehicle Fuel Economy Lookup
x402
Polyform Vehicle Fuel Economy Lookup is a paid API for AI agents from api.polyform.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Returns fuel economy data (city MPG, trim, engine specs) for a specific vehicle, pay-per-call via USDC micropayment.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call data endpoints for AI agents. USDC on Base via x402. No account, no API key — one micropayment per call.
Output
Returns a list of matching vehicle trim entries, each containing a unique match ID, a human-readable trim description (including transmission type, cylinder count, and displacement), and the city MPG rating.
Example use cases
Used car purchase research
“I'm thinking of buying a 2019 Honda Accord 1.5T — what's the city fuel economy and which trim does that engine come in?”
Fleet vehicle efficiency comparison
“Can you pull the city MPG for a 2023 Ford Escape 1.5L 4-cylinder so I can compare it against our current fleet vehicles?”
Road trip cost estimation
“What's the city MPG on a 2022 Subaru Outback 2.5L? I want to estimate how much gas I'll spend commuting in it.”
Technical details
Endpoint
GEThttps://api.polyform.org/v1/vehicle/fuel-economyWhen to prefer
Choose this endpoint when you need authoritative EPA-style city MPG data for a specific vehicle without signing up for an API key or monthly subscription — ideal for AI agents making one-off vehicle lookups with micropayment billing via USDC on Base. Prefer over bulk automotive data APIs when you only need fuel economy for a single vehicle and want zero account overhead.
Side effects
- No matches found if vehicle make/model/year combination is unrecognized or outside EPA database coverage
- Payment failure if USDC balance is insufficient or x402 transaction is rejected
- Ambiguous results if query is too broad and multiple trims are returned, requiring further filtering
- Rate limiting or network error if x402 facilitator is unreachable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"matches": [
{
"id": "36154",
"trim": "Auto (S6), 4 cyl, 2.4 L",
"cityMpg": 27
}
]
}
}Tags
x402
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