I run a Shopify-like SaaS, and I need to be able to collect payments from my customers' customers on behalf of my customers.
It needs to support both one-time payments as well as subscriptions (+ webhooks).
I checked out https://developer.paypal.com, but it was so overwhelming; I had no idea what I needed just to integrate something on behalf of my customers.
I'd imagine I need something that allows me to perform actions using their PayPal accounts on behalf of my customers (e.g. via OAuth authorization).
What is the best PayPal product to get what I want to achieve?