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5 Services from checkdigit.openverbs.com

checkdigit.openverbs.comIMEI Luhn Check Digit Validatorx402

Validates a 15-digit mobile device IMEI number by verifying its Luhn (mod-10) check digit.

$0.002/messagecheckdigit.openverbs.comISBN Validator (ISBN-10 and ISBN-13)x402

Validates an ISBN-10 or ISBN-13 book number using mod-11 or GTIN mod-10 checksum algorithms respectively, with automatic scheme selection based on digit length.

$0.002/messagecheckdigit.openverbs.comGTIN/EAN Barcode Check Digit Validatorx402

Validates EAN-8, UPC-A (12-digit), EAN-13, or GTIN-14 barcode numbers using the standard mod-10 check digit algorithm.

$0.002/messagecheckdigit.openverbs.comABA Routing Number Checksum Validatorx402

Validates a 9-digit US ABA bank routing number using the weighted (3,7,1) mod-10 checksum algorithm

$0.002/messagecheckdigit.openverbs.comLuhn Algorithm Validator (checkdigit.openverbs.com)x402

Validates any digit string against the Luhn (mod-10) checksum algorithm, returning whether the number has a valid check digit.

$0.002/message
checkdigit.openverbs.com – 5 AI agent APIs via x402 | Zero