Checksum Validator
Validates Luhn, IBAN, ISBN, EAN/UPC, SWIFT/BIC, and EU VAT checksums and formats.
| Endpoint | https://apished.com/mcp/v1/checksum (streamable-http) |
|---|---|
| Registry version | 1.0.0 |
| Now | 6 tools · grade C (73) · pin ts_c9717cb29044873bb91d6cbe3776c1f7 · protocol 2025-06-18 |
| First / last listed | 2026-10-29 00:06 UTC / 2026-10-29 00:06 UTC |
| Grade over time | 2026-10-29: C (73), 6 tools |
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Tools: ean_validate iban_validate isbn_validate luhn_validate swiftbic_validate vateu_validate
ean_validate | Validates an 8-digit (EAN-8), 12-digit (UPC-A), 13-digit (EAN-13), or 14-digit (GTIN-14) barcode checksum: alternating weights 1 3 applied right-to-left, check digit is (10 - sum mod 10) mod 10. params: value* |
iban_validate | Validates an IBAN's length for its issuing country (per the SWIFT IBAN registry) and its mod-97 checksum. Does not decompose the BBAN into a bank code/account number or resolve a BIC. params: value* |
isbn_validate | Validates a 10- or 13-character ISBN. ISBN-10 uses weights 10..1 over 10 characters (last may be X, worth 10), sum mod 11 must be 0. ISBN-13 uses the same GTIN checksum as barcodes. params: value* |
luhn_validate | Validates a numeric string against the Luhn (mod-10) checksum — payment card numbers, IMEI numbers, and similar identifiers. params: value* |
swiftbic_validate | Structural format validation only for a SWIFT/BIC code: 8 or 11 characters (4 letters bank code + 2 letters country code + 2 alphanumeric location code + optional 3 alphanumeric branch code). The country code is not cross-checked against ISO 3166-1. params: value* |
vateu_validate | Format validation only (no VIES lookup) for an EU VAT number: checks the 2-letter member-state prefix (EL for Greece, XI for Northern Ireland) against that country's digit/letter pattern. A format-valid result does not mean the number is actually registered. params: value* |
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