I'm quite familiar with API concepts. But I find PayPal's documentation deeply inscrutable and confusing. For example, here are just some of the brands which are referred to, but never seem to be clearly defined or distinguished… Standard Pro Advanced PayPal PayPal Standard PayPal Pro Website Payments PayPal Website Payments Standard PayPal Website Payments Pro Payments PayPal Payments PayPal Payments Standard PayPal Payments Pro PayPal Payments Advanced Payflow PayPal Payflow PayPal Payflow Pro Express/Checkout PayPal Express PayPal Express Checkout PayPal Checkout Commerce PayPal Commerce PayPal Commerce Platform It's unclear: What these names refer to. What the products encompass. Whether these products are current, deprecated, legacy, or unsupported. Whether some are the same product rebranded. What countries they are available in. Which APIs they use. A glossary and history of PayPal's products (defined in unambiguous terminology) would be extremely helpful to newcomers.
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