Using the Ebay's developers API explorer, as a beginner this has been a very disturbing experience. I would really appreciate some help. I wanted to try and create a program that would help me upload in bulk my items. The other ways to upload in bulk on eBay has proven to be VERY difficult to my last try would be trying to run a separate program that would help me. In the explorer in the call request I leave everything default and add in the production token and I get Call Response Status: 400 Bad Request Time: 496 ms. I can't seem to find the reason for it. I would appreciate a direct response not an overview of what to do, I ran out of things I can try.
Thank you!