{"uid":"cap__fXI_gJkXOV06gzKIgHWQ","slug":"vat-number-validation-api-596a8484","name":"VAT Number Validation API","description":"Validate an EU VAT number with per-country syntax and available offline checksum algorithms.","url":"https://gateway.apiosk.com/financial-identifiers/validate/vat","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.022","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wCZH8tFKkdYTdKbGKVMvL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a VAT (Value Added Tax) number, returning its validity, associated country, and checksum correctness","exampleAgentPrompt":"Can you validate this VAT number for me — NL854285197B01 — and tell me if it's valid, which country it belongs to, and whether the checksum checks out?","exampleUseCases":[{"title":"Verify supplier VAT before payment","prompt":"I'm about to send an invoice to a new vendor with VAT number DE123456789. Can you check if that VAT ID is actually valid and from Germany before I proceed?"},{"title":"Validate customer EU tax IDs","prompt":"We're onboarding a batch of B2B customers across Europe. Can you quickly validate their VAT numbers — FR12345678901, IT12345678901, and ES12345678901 — so I know which ones are legitimate for tax purposes?"},{"title":"Check VAT registration authenticity","prompt":"Someone's claiming to be a registered business in Belgium with VAT number BE0123456789. Can you verify if that's a real, properly formatted VAT number and whether the checksum is correct?"}],"resultDescription":"Returns a JSON object indicating whether the VAT number is valid (ok, valid flags), the two-letter ISO country code the VAT number belongs to (e.g. 'NL' for Netherlands), and whether the checksum is mathematically valid (checksum_valid).","failureModes":["Invalid or malformed VAT string returns valid:false with checksum_valid:false","Unsupported country prefix may result in unknown country field or error","Empty or missing vat field causes request validation error","Network or gateway timeout returns HTTP 5xx"],"whenToPreferThis":"Use this endpoint when you need to validate a VAT number for invoicing, B2B onboarding, or tax compliance purposes and want both structural (checksum) and country-level verification in a single call. Prefer this over manual regex checks when you need authoritative checksum validation across multiple EU country formats.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:45:20.396Z","isFirstParty":false}