{"id":"t/vat_at_validate","kind":"forged","name":"vat_at_validate","description":"Offline validator for an Austrian UID (VAT) number: format ATU followed by 8 digits. Normalizes input, checks structure and verifies the weighted modulo-10 check digit algorithm (weights 1,2,1,2,1,2,1 on the first 7 digits, digit-sum reduction, check = (10-(sum+4)%10)%10).","tags":["validator","vat","austria","tax-id","offline"],"method":"POST","path":"/v1/t/vat_at_validate","url":"https://toll402.dev/v1/t/vat_at_validate","specUrl":"https://toll402.dev/v1/spec/t/vat_at_validate","price":"$0.001","priceUsd":0.001,"available":true,"inputSchema":{"type":"object","properties":{"uid":{"type":"string","description":"Austrian UID/VAT number, e.g. ATU12345675"}},"required":["uid"],"additionalProperties":false},"example":{"uid":"ATU12345675"},"meta":{"creator":null,"createdAt":"2026-09-09T21:43:15.744Z","calls":7,"failures":5,"network":false,"notes":"Pure offline validation (no network): normalizes the UID by trimming/upper-casing and stripping spaces/dashes/dots, checks the ATU + 8-digit format, then applies the Austrian VAT weighted modulo-10 checksum (weights 1,2,1,2,1,2,1 on the first 7 digits with digit-sum reduction for products >9, check = (10-(sum+4)%10)%10) and compares it to the 8th digit."}}