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Crypto Math Check Digits
x402
Crypto Math Check Digits is a paid API for AI agents from crypto-math.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).
Generate or validate Luhn and ISO 7064 mod 97-10 (IBAN-style) check digits for a given numeric or alphanumeric string.
Price / call$0.02
Success—
StatusUnknown
How this service works
Generate or validate Luhn and ISO 7064 mod 97-10 (IBAN style) check digits from the string you supply.
Output
Returns a JSON object containing the computed or validated check digits, the scheme used, a human-readable summary, a verdict (for validation), reasons explaining the result, the IBAN string (if applicable), country code, expected IBAN length, and a disclaimer. For generation, check digits are returned as a string; for validation, a pass/fail verdict with explanatory reasons is provided.
Example use cases
IBAN generation for a new bank account
“I have a UK bank account with BBAN 20000055779141 — can you generate the full IBAN check digits using the iban scheme so I have a valid GB IBAN?”
Credit card Luhn validation
“Can you validate whether 4532015112830366 passes the Luhn check? Use the validate action with the luhn scheme.”
Mod 97-10 check digit generation for internal IDs
“I need to add ISO 7064 mod 97-10 check digits to the alphanumeric string ABC1234567 — can you generate them using the mod97-10 scheme?”
Technical details
Endpoint
GEThttps://crypto-math.x402tookit.com/check-digits?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, standards-compliant generation or validation of check digits using Luhn or ISO 7064 mod 97-10 algorithms — including IBAN construction and verification. Prefer it over general-purpose math endpoints when the specific use case involves financial account numbers, credit card numbers, or any identifier that uses these two widely adopted check digit standards.
Side effects
- Missing required 'value' or 'scheme' query parameters returns an error
- Providing letters in a Luhn scheme input (which only accepts digits) causes a validation error
- Invalid country code for IBAN scheme returns an error about unsupported country
- Providing an already-complete number when action=generate may produce incorrect results
- Non-alphanumeric characters in mod97-10 input may cause a parsing error
- Providing a malformed IBAN for validation may return a verdict of invalid with reasons
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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