{"uid":"cap_RU1FudbxQzupF8poOndCn","slug":"french-vat-number-checksum-validator-56ac4b60","name":"French VAT Number Checksum Validator","description":"Call when an agent needs whether a FR VAT checksum is valid. No registry lookup. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/check-vat-fr first.","url":"https://agentshelf.syntexa.ch/v1/check-vat-fr?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":["00000000093"],"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":"0.007","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":"$0.007/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_QCnMpz3_Ddemtb5vTlRn5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.007","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates the checksum of a French VAT (TVA) number without performing a live registry lookup","exampleAgentPrompt":"Can you check whether the French VAT number FR83404833048 has a valid checksum — no need to look it up in any registry, just verify the format and checksum are correct?","exampleUseCases":[{"title":"E-commerce checkout VAT verification","prompt":"Before we finalize this B2B invoice for our French customer, can you confirm that their VAT number FR61954506077 passes the checksum validation?"},{"title":"Supplier onboarding data quality check","prompt":"We're onboarding a new French supplier and they gave us their TVA number FR40303265045 — can you verify the checksum is valid before we add them to our system?"},{"title":"Bulk invoice data cleanup","prompt":"I have a French VAT number from an old record: FR83404833048 — can you quickly tell me if the checksum is correct so I know whether it's worth keeping?"}],"resultDescription":"Returns whether the provided French VAT number passes the checksum algorithm — a boolean validity result based purely on the mathematical checksum, with no external registry or VIES lookup performed.","failureModes":["Input string is empty or missing — returns validation error","VAT number exceeds 20 character limit — rejected by schema","Non-FR VAT number format submitted — may return invalid or error","Network or payment failure (x402 USDC payment not processed) — request not fulfilled","Malformed JSON body — returns 400-level error"],"whenToPreferThis":"Choose this endpoint when you need fast, offline checksum validation of a French VAT number without incurring the latency or cost of a live VIES or government registry lookup. It is ideal for pre-filtering invalid numbers before expensive registry calls, or when registry availability is unreliable. Use the free sandbox endpoint POST /v1/sandbox/check-vat-fr first during development. Do not use this if you need to confirm the VAT number is actually registered and active with French tax authorities — that requires a live registry lookup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:16.177Z","isFirstParty":false,"canonicalSlug":"french-vat-number-checksum-validator-56ac4b60"}