{"name":"FuelTax IFTA Rates API","version":"0.1.0","description":"Cleaned, structured IFTA fuel-tax data for trucking: quarterly rates for all member jurisdictions, quarter-over-quarter changes, official footnotes, and the published USD/CAD exchange rate. Every quarter is human-reviewed against the source before it is served.","payment":{"protocol":"x402","network":"base","asset":"USDC","pay_to":"0x421d31725e1e7990662600a780ebbb6c92f1cb09","note":"Paid endpoints respond 402 with signed payment requirements. Free endpoints need nothing. You are never charged for error responses."},"endpoints":[{"method":"GET","path":"/v1/quarters","price":"free","description":"Catalog of published IFTA quarters: bounds, filing deadline, fuel types, jurisdiction count, mid-quarter-revision flag. Free — start here."},{"method":"GET","path":"/v1/quarters/{quarter}","price":"free","description":"One quarter's catalog entry. Quarter labels look like 2026-Q2."},{"method":"GET","path":"/v1/jurisdictions","price":"free","description":"The IFTA jurisdiction registry: code, name, country, surcharge flag, weight-distance program. Free."},{"method":"GET","path":"/v1/rates","price":"$0.005","description":"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."},{"method":"GET","path":"/v1/quarters/{quarter}/changes","price":"$0.01","description":"Quarter-over-quarter rate diff with exact 6-decimal deltas, plus added/removed jurisdictions — what changed since last quarter, precomputed."},{"method":"GET","path":"/v1/quarters/{quarter}/footnotes","price":"$0.002","description":"The quarter's official matrix footnotes (fuel-equivalence rules, tax holidays, split-rate notices) — the caveats that change filings."},{"method":"GET","path":"/v1/quarters/{quarter}/exchange-rate","price":"$0.002","description":"The USD/CAD exchange rate published in that quarter's matrix."}],"conventions":{"quarter_label":"YYYY-Qn, e.g. 2026-Q2","envelope":"Every response is { data, meta }; meta carries source attribution, a disclaimer, and generated_at.","jurisdiction_codes":"Rates and changes use 2-letter codes (WA, BC). Footnote entries carry full uppercase jurisdiction names verbatim from the official matrix (WASHINGTON, BRITISH COLUMBIA)."},"links":{"openapi":"https://api.freestylevault.com/openapi.json","llms_txt":"https://api.freestylevault.com/llms.txt"},"attribution":"IFTA quarterly tax rate matrix (iftach.org), human-reviewed import each quarter.","disclaimer":"Reference data. Verify against the official IFTA matrix before filing."}