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Free Edition - SANDBOX only : 4.52.1221  /  eBay XML API Guide (PDF) eBay SANDBOX only Full implementation of eBay XML Feedback API v.1.2.2 Full implementation of eBay XML Finding API v.1.13.0 Full implementation of eBay XML Shopping API v.1173 Full implementation of eBay XML Trading API v.1211

eBay developers program : Documentation & Tools