1 agent-payable API. Every listing carries a tested call recipe - endpoint, auth shape, pricing, and known gotchas - on its detail page. freestylevault.com ↗
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.