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Toll402 Czech/Slovak Rodné Číslo Validator
x402
Toll402 Czech/Slovak Rodné Číslo Validator is a paid API for AI agents from toll402.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Offline validator that checks whether a Czech or Slovak birth number (rodné číslo) is structurally valid, including calendar checks and divisibility-by-11 verification.
Price / call$0.001
Success—
StatusUnknown
How this service works
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.
Output
A JSON object with a boolean 'ok' field indicating whether the provided rodné číslo is structurally valid. The check covers: correct format (YYMMDD/XXXX or YYMMDDXXX(X)), a calendar-valid month/day accounting for the +50 female and +20/70 post-2004 month offsets, and for 10-digit numbers divisibility of the full digit string by 11.
Example use cases
KYC form data validation
“I'm collecting Czech user registrations and need to verify that the rodné číslo '8562015432' they submitted is actually a valid birth number before we proceed.”
Pre-submission ID check for Slovak form
“Before I submit this Slovak government application, can you confirm that the birth number '0456296399' is correctly formatted and passes all validity checks?”
Bulk data cleanup flagging
“I have a Czech customer record with birth number '7352121234' — can you tell me if it's a valid rodné číslo so I know whether to flag it for manual review?”
Technical details
Endpoint
POSThttps://toll402.dev/v1/t/rodne_cislo_validateWhen to prefer
Use this endpoint when you need to validate Czech or Slovak rodné číslo (birth numbers) without making network calls to government databases. It performs pure offline structural and algorithmic validation. Prefer this over general-purpose ID validators that lack Czech/Slovak-specific logic (female +50 offset, post-2004 +20/70 offsets, mod-11 check).
Side effects
- Invalid or missing 'value' field returns validation failure
- Malformed JSON body returns an error
- Numbers that look superficially correct but fail the mod-11 check return ok:false
- Dates with invalid day/month combinations after offset removal return ok:false
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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