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FuelTax IFTA Rates API – Quarter Footnotes
x402
FuelTax IFTA Rates API – Quarter Footnotes 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 footnotes associated with IFTA quarterly fuel tax rate data for a specified quarter, sourced from human-reviewed iftach.org imports.
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 response containing footnote data and metadata associated with the specified IFTA quarterly tax rate matrix. Footnotes typically include jurisdiction-specific exceptions, rate qualifications, or special conditions noted by IFTA for that quarter. The response follows a standard {data, meta} envelope.
Example use cases
Pre-filing IFTA footnote review
“Before I file my IFTA return for 2025-Q4, can you pull the footnotes for that quarter's tax rate matrix so I know if any jurisdictions have special exceptions?”
Fleet compliance audit preparation
“We're auditing our fleet's IFTA filings for Q1 2026 — can you get me all the footnotes from the IFTA rate matrix for that quarter so we can verify our calculations?”
Tax software data enrichment
“I need the footnote annotations from the IFTA quarterly tax rates for 2026-Q2 to enrich our fuel tax software's reference data before we update the rate tables.”
Technical details
Endpoint
GEThttps://api.freestylevault.com/v1/quarters/%7Bquarter%7D/footnotesWhen to prefer
Use this endpoint when you need footnote annotations or special exceptions attached to IFTA quarterly tax rates — particularly before filing IFTA returns or when enriching fuel tax reference data with qualifications that affect how rates should be interpreted. Prefer this over the main rates endpoint when your workflow specifically requires the explanatory footnotes rather than the numeric rate values themselves.
Side effects
- Invalid or unsupported quarter format returns an error — use format like 2026-Q2
- HTTP 402 returned when payment is not provided — must retry with PAYMENT-SIGNATURE header using x402 protocol
- Quarter not yet published or too far in the future returns empty or error response
- Malformed quarter path parameter causes a 400 or routing error
- No footnotes available for a given quarter returns empty data object
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {},
"meta": {}
}
}Tags
x402
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