{"id":"t/regon_validate","kind":"forged","name":"regon_validate","description":"Offline validator for a Polish REGON business registry number (9-digit or 14-digit form). Verifies length/digit format and the official weighted checksum for each length (9-digit uses weights 8,9,2,3,4,5,6,7; 14-digit uses weights 2,4,8,5,0,9,7,3,6,1,2,4,8 over the first 13 digits), returning validity and normalized form.","tags":["validator","poland","regon","tax-id","offline"],"method":"POST","path":"/v1/t/regon_validate","url":"https://toll402.dev/v1/t/regon_validate","specUrl":"https://toll402.dev/v1/spec/t/regon_validate","price":"$0.001","priceUsd":0.001,"available":true,"inputSchema":{"type":"object","properties":{"regon":{"type":"string","description":"REGON number, 9 or 14 digits, spaces allowed"}},"required":["regon"]},"example":{"regon":"000331501"},"meta":{"creator":null,"createdAt":"2026-09-09T22:24:49.522Z","calls":3,"failures":2,"network":false,"notes":"Offline REGON validator: strips whitespace, checks digit-only format and length (9 or 14), then verifies the official weighted checksum(s) — for 14-digit numbers it also validates the embedded 9-digit REGON checksum before checking the full 13-digit weighted sum against the 14th check digit; no network calls are made."}}