{"uid":"cap__1XDI7Sr8qt54AxTwDzZg","slug":"finnish-vat-number-checksum-validator-cc669aff","name":"Finnish VAT Number Checksum Validator","description":"Call when an agent needs whether a FI VAT checksum is valid. No registry lookup. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/check-vat-fi first.","url":"https://agentshelf.syntexa.ch/v1/check-vat-fi?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":["00000019"],"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":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_sCWUSyiWodoY5qiOrRCvC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","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 Finnish (FI) VAT number without performing a live registry lookup","exampleAgentPrompt":"Can you check whether the Finnish VAT number FI28493382 has a valid checksum — no need to look it up in any registry, just verify the number itself is correctly formed?","exampleUseCases":[{"title":"Invoice validation before payment","prompt":"Before I pay this invoice from a Finnish supplier, can you verify that their VAT number FI23456781 passes checksum validation?"},{"title":"Bulk supplier onboarding check","prompt":"We're onboarding a Finnish vendor and they gave us VAT number FI12345670 — can you confirm the checksum is valid so we can proceed with the contract?"},{"title":"E-commerce checkout VAT field verification","prompt":"A customer entered FI87654321 as their Finnish VAT number during checkout — can you tell me if that number has a valid checksum?"}],"resultDescription":"A response indicating whether the provided Finnish VAT number passes or fails the algorithmic checksum test, without querying any external tax authority registry","failureModes":["Empty or missing value field returns validation error","Value exceeds 20,000 character limit","Non-FI VAT format provided may return invalid or error","Malformed request body returns 400-level error","Payment failure or insufficient USDC balance blocks the request"],"whenToPreferThis":"Use this endpoint when you need a fast, offline checksum verification of a Finnish VAT number and do not require confirmation that the business is actually registered with the Finnish Tax Administration. It is cheaper and faster than a live registry lookup. Try the free sandbox endpoint POST /v1/sandbox/check-vat-fi first before paying $0.004 USDC per call on this production endpoint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:04.815Z","isFirstParty":false,"canonicalSlug":"finnish-vat-number-checksum-validator-cc669aff"}