{"id":"t/vkn_validate","kind":"forged","name":"vkn_validate","description":"Offline structural validator for a Turkish VKN (Vergi Kimlik Numarası, 10-digit tax identification number). Normalizes input by stripping spaces/dashes, then checks that it is exactly 10 digits, all numeric, and does not start with 0. Full checksum algorithm is not applied (best-effort structural check only).","tags":["validator","turkey","tax-id","vkn","offline"],"method":"POST","path":"/v1/t/vkn_validate","url":"https://toll402.dev/v1/t/vkn_validate","specUrl":"https://toll402.dev/v1/spec/t/vkn_validate","price":"$0.001","priceUsd":0.001,"available":true,"inputSchema":{"type":"object","properties":{"vkn":{"type":"string","description":"VKN string, optionally with spaces or dashes"}},"required":["vkn"],"additionalProperties":false},"example":{"vkn":"1234567890"},"meta":{"creator":null,"createdAt":"2026-09-10T00:29:59.689Z","calls":5,"failures":4,"network":false,"notes":"Pure offline structural validator: strips spaces/dashes, checks length==10, all-numeric, and no leading zero; does not implement the full VKN checksum algorithm, no external data sources used."}}