{"provider":{"host":"checkdigit.openverbs.com","name":"Luhn check","score":69.9,"live":true,"checkedAt":"2026-10-27T18:55:11.445Z","uptime72h":100,"lastCheck":{"httpStatus":402,"ms":680,"note":"valid x402 v2 terms"},"endpoints":5,"networks":["eip155:8453"],"cheapestUsd":"0.002","income7dUsd":"21.821","payers7d":28,"transfers7d":1470,"payoutAddressShared":true,"claimed":false,"page":"https://logicnodes.io/observatory/p/checkdigit.openverbs.com"},"endpoints":[{"url":"https://checkdigit.openverbs.com/v1/ean","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Validate a GTIN barcode number — EAN-8, UPC-A (12), EAN-13 or GTIN-14 — by the standard mod-10 check digit. Length selects the scheme."},{"url":"https://checkdigit.openverbs.com/v1/imei","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Validate a 15-digit mobile device IMEI by its Luhn check digit. Spaces and hyphens are ignored."},{"url":"https://checkdigit.openverbs.com/v1/isbn","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Validate an ISBN-10 (mod-11, trailing X allowed) or ISBN-13 (GTIN mod-10) book number. Length after removing spaces/hyphens selects the scheme."},{"url":"https://checkdigit.openverbs.com/v1/luhn","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Validate a number by the Luhn (mod-10) algorithm — the scheme behind credit/debit card numbers and many IDs. Spaces and hyphens are ignored. A mismatched check digit is a successful { valid: false }."},{"url":"https://checkdigit.openverbs.com/v1/routing","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Validate a 9-digit US ABA bank routing number by its weighted (3,7,1) mod-10 checksum. Spaces and hyphens are ignored."}]}