{"id":"t/rodne_cislo_validate","kind":"forged","name":"rodne_cislo_validate","description":"Offline validator for a Czech/Slovak rodné číslo (birth number). Normalizes input to YYMMDD/XXXX or YYMMDDXXX(X), checks the calendar-valid month/day (accounting for the +50 female and +20/70 post-2004 month offsets), and for 10-digit numbers confirms the full digit string (slash removed) is evenly divisible by 11. No network calls.","tags":["validator","czech","slovak","national-id","offline"],"method":"POST","path":"/v1/t/rodne_cislo_validate","url":"https://toll402.dev/v1/t/rodne_cislo_validate","specUrl":"https://toll402.dev/v1/spec/t/rodne_cislo_validate","price":"$0.001","priceUsd":0.001,"available":true,"inputSchema":{"type":"object","properties":{"value":{"type":"string","description":"Rodné číslo, with or without slash, e.g. 900101/0007"}},"required":["value"],"additionalProperties":false},"example":{"value":"900101/0007"},"meta":{"creator":null,"createdAt":"2026-09-10T00:44:23.999Z","calls":13,"failures":6,"network":false,"notes":"Pure offline logic: strips non-digits, derives sex and real month from the +20/+50/+70 offsets, validates calendar month/day (using JS Date day-count trick for leap years), infers century from length (9-digit = pre-1954, 10-digit uses yy<54 => 2000s else 1900s), and for 10-digit numbers checks divisibility by 11 via BigInt on the full digit string; no network calls used."}}