FuelTax IFTA Rates API

active

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.

DataBasex402 v2exactfreestylevault.com ↗︎

Settled via Coinbase.

Transactions · 30d
7
Volume · 30d
$0.035
Unique buyers · 30d
5
Uptime · 30d
96.7%
Latency p50
255ms
Reported calls · 30d
5

Endpoints (7 live)

  • GET /v1/quarters/2026-Q2/changes — Quarter-over-quarter rate diff with exact 6-decimal deltas, plus added/removed jurisdictions — what changed since last quarter, precomputed. (0.01 USDC on Base)
  • GET /v1/quarters/2026-Q2/footnotes — The quarter's official matrix footnotes (fuel-equivalence rules, tax holidays, split-rate notices) — the caveats that change filings. (0.002 USDC on Base)
  • GET /v1/quarters/2026-Q2/exchange-rate — The USD/CAD exchange rate published in that quarter's matrix. (0.002 USDC on Base)
  • GET /v1/rates — Committed IFTA tax rates for a quarter (?quarter=2026-Q2&fuel_type=diesel&jurisdiction=WA), grouped by jurisdiction × fuel type with effective periods clipped to the quarter — mid-quarter revisions read as separate periods. Human-reviewed against iftach.org every quarter. (0.005 USDC on Base)
  • GET /v1/quarters/1/footnotes — The quarter's official matrix footnotes (fuel-equivalence rules, tax holidays, split-rate notices) — the caveats that change filings. (0.002 USDC on Base)
  • GET /v1/quarters/1/changes — Quarter-over-quarter rate diff with exact 6-decimal deltas, plus added/removed jurisdictions — what changed since last quarter, precomputed. (0.01 USDC on Base)
  • GET /v1/quarters/1/exchange-rate — The USD/CAD exchange rate published in that quarter's matrix. (0.002 USDC on Base)

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