{"uid":"cap_NJjdelVutu8qeVZotHZXu","slug":"fueltax-ifta-rates-api-quarterly-rate-lookup-1cc3704c","name":"FuelTax IFTA Rates API – Quarterly Rate Lookup","description":"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.","url":"https://api.freestylevault.com/v1/rates","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"quarter":{"type":"string"},"fuel_type":{"type":"string"},"jurisdiction":{"type":"string"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hWDdVDb9VB4WeBI2V7epT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns committed IFTA fuel tax rates for a given quarter, jurisdiction, and fuel type, with mid-quarter revisions exposed as separate effective periods.","exampleAgentPrompt":"Can you look up the committed IFTA diesel tax rate for Washington state for Q2 2026, including any mid-quarter rate revision periods?","exampleUseCases":[{"title":"IFTA quarterly tax filing prep","prompt":"I'm preparing our IFTA return for Q2 2026 — can you pull the diesel tax rates for all our operating states, starting with Washington and Oregon?"},{"title":"Mid-quarter rate revision check","prompt":"Did the IFTA diesel rate change mid-quarter in California for Q1 2026? If so, show me the separate effective periods and their rates."},{"title":"Fleet compliance rate validation","prompt":"We need to verify the IFTA diesel rate for Texas in Q3 2025 to make sure our fuel tax calculations are correct — can you fetch the committed rate for that quarter?"}],"resultDescription":"A structured response listing IFTA tax rate entries for the specified quarter, jurisdiction, and fuel type. Each entry includes the effective period (clipped to the quarter), the tax rate, jurisdiction code, and fuel type. Mid-quarter rate revisions appear as separate period entries, enabling precise pro-rated tax calculations.","failureModes":["Unknown or unsupported jurisdiction code returns an empty result or 404","Invalid quarter format (not YYYY-QN) causes a validation error","Unsupported fuel type returns no results or an error","Quarter not yet imported (future quarter) returns no data","Rate data not yet human-reviewed for the specified quarter may be unavailable"],"whenToPreferThis":"Choose this endpoint when you need authoritative, human-reviewed IFTA quarterly tax rates keyed by jurisdiction and fuel type, especially when mid-quarter revisions matter for accurate pro-rated IFTA reporting. It is specifically useful for fleet operators, trucking compliance tools, and tax software that must produce correct IFTA filings. Prefer this over scraped or unverified sources when auditability and quarterly accuracy against iftach.org are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:31:52.704Z","isFirstParty":false}