{"uid":"cap_uS9OuzE2ZePOXlGIjG78_","slug":"hungarian-vat-number-checksum-validator-d9af4a58","name":"Hungarian VAT Number Checksum Validator","description":"Call when an agent needs whether a HU VAT checksum is valid. No registry lookup. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/check-vat-hu first.","url":"https://agentshelf.syntexa.ch/v1/check-vat-hu?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"data":{"description":"JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."},"value":{"type":"string","examples":["00000017"],"maxLength":20000,"minLength":1,"description":"Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."},"schema":{"description":"JSON Schema document for schema-check SKUs. Omit it on string checks."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.008","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":"$0.008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KFc364LHLqb01f72Q7euR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates whether a Hungarian VAT number has a valid checksum, with no external registry lookup.","exampleAgentPrompt":"Can you check whether the Hungarian VAT number '12345678-1-23' has a valid checksum? No registry lookup needed, just the mathematical validation.","exampleUseCases":[{"title":"Invoice VAT number pre-check","prompt":"Before I send this invoice to a Hungarian supplier, can you verify the VAT number '12345678-2-11' has a valid HU checksum?"},{"title":"E-commerce checkout validation","prompt":"A customer entered '98765432-1-42' as their Hungarian VAT number — can you confirm the checksum is mathematically valid before we proceed?"},{"title":"Batch data cleanup screening","prompt":"I'm cleaning up our vendor database — can you tell me if the HU VAT number '11111111-3-00' passes the Hungarian checksum algorithm?"}],"resultDescription":"Returns whether the provided Hungarian VAT number string passes the official HU VAT checksum algorithm — a boolean validity result with no external registry or live database consulted.","failureModes":["Empty or missing VAT number string returns validation error","VAT number exceeding 20000 characters rejected","Malformed input schema causes 400 error","Payment of $0.008 USDC required; unpaid requests should use /v1/sandbox/check-vat-hu first","Non-Hungarian VAT number formats may return false negatives"],"whenToPreferThis":"Use this endpoint when you need a fast, deterministic, offline checksum validation of a Hungarian VAT number without triggering a live government registry lookup. Ideal for pre-validation in forms, invoice processing pipelines, or data cleaning workflows where speed and cost matter more than live registry confirmation. Try the free sandbox endpoint (/v1/sandbox/check-vat-hu) before paying.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:09.240Z","isFirstParty":false,"canonicalSlug":"hungarian-vat-number-checksum-validator-d9af4a58"}