Ecosyste.ms: Packages
An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.
packagist.org "ISBN code" keyword
imelgrat/barcode-validator v1.1.3
A PHP class for validating EAN, IMEI, ISBN, GTIN, SSCC, GSIN, UPC and other barcodes.3 versions - Latest release: over 3 years ago - 57.6 thousand downloads total - 20 stars on GitHub - 1 maintainer