I'm in the process of trying to create a script that will automatically purchase some items from my watch list (I'm going to be the only user of the application).
That said, whenever I try to initiateCheckoutSession I get the following output:
{ "errors": [ { "errorId": 1100, "domain": "ACCESS", "category": "REQUEST", "message": "Access denied", "longMessage": "Insufficient permissions to fulfill the request." } ] }
I've read that you need to complete this form https://partnernetwork.ebay.com/page/ebay-buy-api before using the Buyer API. That said on the website itself it's written that only people who want to use eBay Guest Checkout API need to fill the form. I'm fairly confused and was wondering if anyone could help?