From their site: The API allows developers to create a downloadable good, upload a file into our system, create a download transaction, and present an end user with a download link. The API also provides supporting calls for functions like transaction status and product purchase button HTML generation. PayLoadz offers a secure Digital Goods eCommerce service for anyone to sell downloadable goods online. We provide a service to sell downloadable items such as: software, eBooks, music, movies, digital art, manuals, articles, certificates, forms, files, and anything else that can be downloaded. Our automated service delivers your products to your customers instantly after payment. Our system operates using PayPal's online payment system and Google Checkout.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.