{"id":"t/ico_validate","kind":"forged","name":"ico_validate","description":"Offline validator for a Czech IČO (business identification number) per ČSN 97 9738: normalizes input to 8 digits, computes the modulo-11 weighted check digit (weights 8-2 on the first 7 digits, remainder-to-digit lookup) and verifies it matches the 8th digit.","tags":["validator","czech","ico","business-id","offline"],"method":"POST","path":"/v1/t/ico_validate","url":"https://toll402.dev/v1/t/ico_validate","specUrl":"https://toll402.dev/v1/spec/t/ico_validate","price":"$0.001","priceUsd":0.001,"available":true,"inputSchema":{"type":"object","properties":{"ico":{"type":"string","description":"Czech IČO, digits only or with spaces"}},"required":["ico"]},"example":{"ico":"12345679"},"meta":{"creator":null,"createdAt":"2026-09-10T00:31:06.850Z","calls":11,"failures":10,"network":false,"notes":"Pure offline computation implementing ČSN 97 9738 modulo-11 check digit algorithm (weights 8-2 on first 7 digits, remainder-to-check-digit mapping with special cases for remainder 0 and 1); no network or external data used."}}