{"uid":"cap_7FiwsvykwU9jqM7edVgDl","slug":"toll402-vkn-validator-1f2cde2e","name":"Toll402 VKN Validator","description":"The OpenRouter for AI-agent tools: one gateway, one wallet, every capability. Built-in tools, forged tools, a global verified business directory and 2,000+ aggregated x402 services, all paid per call in USDC via x402 (HTTP 402). No signup, no API key.","url":"https://toll402.dev/v1/t/vkn_validate","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["vkn"],"properties":{"vkn":{"type":"string","description":"VKN string, optionally with spaces or dashes"}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ok":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rC8bNk9IOSmdQ0NTOUxr4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a Danish VAT registration number (CVR/VKN) offline, checking format correctness","exampleAgentPrompt":"Can you check whether this Danish VKN is valid: 12 34 56 78?","exampleUseCases":[{"title":"Invoice pre-submission VAT check","prompt":"Before I send this invoice to my Danish supplier, can you validate their VAT number 12345678 to make sure the format is correct?"},{"title":"Onboarding Danish business partner","prompt":"We're onboarding a new Danish company and they gave us VKN 87-65-43-21 — can you verify that's a properly formatted Danish VAT registration number?"},{"title":"Bulk data cleanup for Danish customers","prompt":"I've got a Danish customer record with VKN '23 45 67 89' — can you validate it so I know if it's a real format before we import it into our system?"}],"resultDescription":"Returns a JSON object with an 'ok' boolean field indicating whether the provided VKN string is a validly formatted Danish VAT registration number. No network lookup is performed — this is a pure offline format/checksum validation.","failureModes":["Malformed input (non-string or missing vkn field) returns an error","VKN with invalid checksum or wrong digit count returns ok: false","Network or gateway errors may return HTTP 5xx"],"whenToPreferThis":"Choose this endpoint when you need fast, free-of-external-dependency offline validation of a Danish VKN (CVR) number format — for example, before submitting invoices, onboarding Danish business partners, or cleaning up CRM data. It accepts numbers with spaces or dashes, making it robust for user-entered data. Prefer it over manual regex checks or full government API lookups when you only need format verification.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:49:25.198Z","isFirstParty":false}