{"uid":"cap_1uOj27albcUL7mspd25Ns","slug":"bulgarian-vat-number-checksum-validator-7b9bf13b","name":"Bulgarian VAT Number Checksum Validator","description":"Call when an agent needs whether a BG VAT checksum is valid. No registry lookup. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-vat-bg first.","url":"https://agentshelf.syntexa.ch/v1/check-vat-bg?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":["000000018"],"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":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_U3Qw1Uw50TdFQqtcAUWt1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates whether a Bulgarian VAT number passes the official checksum algorithm, without performing any live registry lookup.","exampleAgentPrompt":"Can you check if the Bulgarian VAT number BG123456789 passes the checksum — I just need to know if it's structurally valid, no registry lookup needed.","exampleUseCases":[{"title":"Invoice validation before submission","prompt":"Before I send this invoice, can you confirm that the Bulgarian VAT number BG204514107 is structurally valid according to the checksum rules?"},{"title":"E-commerce checkout BG VAT verification","prompt":"A customer entered BG999999999 as their Bulgarian VAT number during checkout — can you tell me if it's a valid checksum so I can decide whether to accept it?"},{"title":"Bulk import data quality check","prompt":"I'm cleaning up a spreadsheet of European supplier VAT numbers — can you verify whether BG175074752 is a properly formatted, checksum-valid Bulgarian VAT ID?"}],"resultDescription":"A boolean or structured response indicating whether the provided Bulgarian VAT number passes the official BG VAT checksum algorithm. No live registry or government database is queried — only the algorithmic checksum is evaluated.","failureModes":["Input value is empty or missing — returns validation error","Input exceeds 20000 characters — rejected by schema","Malformed request body — returns 400 or similar client error","Payment not attached or insufficient USDC — returns 402 Payment Required","Non-string or non-BG VAT format passed — may return false validity or error"],"whenToPreferThis":"Use this endpoint when you need a fast, cheap, offline checksum validation of a Bulgarian VAT number and do not need to confirm the number is actually registered with the Bulgarian tax authority. Ideal for pre-submission validation, data cleaning, or form input verification where a registry lookup is unnecessary or too slow. Prefer the free sandbox endpoint /v1/sandbox/check-vat-bg for testing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:11.743Z","isFirstParty":false,"canonicalSlug":"bulgarian-vat-number-checksum-validator-7b9bf13b"}