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FuelTax IFTA Rates API – Quarterly Exchange Rate Lookup
x402
FuelTax IFTA Rates API – Quarterly Exchange Rate Lookup is a paid API for AI agents from api.freestylevault.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-12).
Returns IFTA quarterly fuel tax rate data (exchange/conversion rates) for a specified quarter, sourced from iftach.org and human-reviewed each quarter.
Price / call$0.002
Success—
StatusUnknown
How this service works
IFTA quarterly tax rate matrix (iftach.org), human-reviewed import each quarter. Reference data. Verify against the official IFTA matrix before filing. Paid endpoints use the x402 payment protocol (base, USDC): expect HTTP 402 with PAYMENT-REQUIRED, retry with PAYMENT-SIGNATURE.
Output
A JSON object containing the IFTA tax rate data for the specified quarter, including rate values and metadata. The response includes a `data` object with rate details and a `meta` object with quarter and source information. Rates are human-reviewed imports from iftach.org and should be verified against the official IFTA matrix before filing.
Example use cases
Pre-filing IFTA rate verification
“Pull the IFTA quarterly tax rates for 2026-Q2 so I can verify my diesel rates for Washington and Oregon before I file this quarter's return.”
Fleet compliance automation
“Get me the IFTA rate matrix for Q1 2026 — I need the rates for all jurisdictions where my trucks operated so I can calculate what we owe.”
Historical IFTA rate research
“What were the IFTA fuel tax exchange rates for 2025-Q3? I'm reconciling last year's fuel tax filings and need to confirm the rates we used.”
Technical details
Endpoint
GEThttps://api.freestylevault.com/v1/quarters/%7Bquarter%7D/exchange-rateWhen to prefer
Use this endpoint when you need machine-readable IFTA quarterly fuel tax rate data for compliance, reporting, or fleet management automation. It is particularly valuable when you need structured rate data by jurisdiction and fuel type without manually parsing PDFs from iftach.org. Prefer this over manual lookups when automating quarterly IFTA filings or when building trucking compliance workflows. Always cross-verify results against the official IFTA matrix before filing, as stated in the service description.
Side effects
- Quarter not yet published — rates for future or very recent quarters may not be available
- Invalid quarter format — malformed quarter parameter returns an error
- HTTP 402 Payment Required — request must be retried with a valid x402 PAYMENT-SIGNATURE header and USDC payment
- Unknown jurisdiction or fuel type — may return empty data or 404
- Stale data — rates are imported quarterly and may lag slightly behind official publication
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {},
"meta": {}
}
}Tags
x402
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