{"uid":"cap_r4Bklr5JD_teg_4ToB6L6","slug":"slovenian-vat-number-checksum-validator-9c7bb334","name":"Slovenian VAT Number Checksum Validator","description":"Call when an agent needs whether a SI VAT checksum is valid. No registry lookup. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/check-vat-si first.","url":"https://agentshelf.syntexa.ch/v1/check-vat-si?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":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ijHLP48_z4W-RaK-nFVFM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","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 Slovenian (SI) VAT number without performing a live registry or VIES lookup","exampleAgentPrompt":"Can you check whether the Slovenian VAT number SI12345678 has a valid checksum? I just need a local checksum check, no registry lookup.","exampleUseCases":[{"title":"Pre-submission invoice VAT validation","prompt":"Before I send this invoice to our Slovenian supplier, can you verify that their VAT number SI96888345 has a valid checksum so I don't get it rejected?"},{"title":"Bulk onboarding data quality check","prompt":"I'm onboarding a new Slovenian vendor and want to make sure the VAT number they gave us — SI15012557 — is structurally correct before we add it to our system. Can you validate the checksum?"},{"title":"Tax form audit sanity check","prompt":"We're auditing some old tax records and need to quickly verify whether SI72996868 is a legitimately formatted Slovenian VAT number based on its checksum alone."}],"resultDescription":"A response indicating whether the provided Slovenian VAT number passes its checksum algorithm — returns a validity boolean or equivalent indicator. No external registry or VIES database is consulted; this is a pure algorithmic checksum check.","failureModes":["Empty or missing value field returns a validation error","VAT number string exceeds maxLength of 20000 characters","Malformed request body returns HTTP 400","Payment not included or insufficient USDC triggers HTTP 402","Non-SI VAT numbers (e.g. DE, FR prefix) may return invalid or unexpected results"],"whenToPreferThis":"Use this endpoint when you need a fast, offline, purely algorithmic checksum validation of a Slovenian SI-prefix VAT number and do not need a live registry lookup to confirm the number is actually registered. It is cheaper and faster than VIES-based lookups and works without network access to external tax registries. Prefer the unpaid sandbox endpoint `/v1/sandbox/check-vat-si` for testing before committing to paid calls.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:08.000Z","isFirstParty":false,"canonicalSlug":"slovenian-vat-number-checksum-validator-9c7bb334"}