Regarding the use of API

[akob-80]

As a new user, which type of eBay API would you recommend for checking my sales performance and batch listing products?

[developer-support@ebay.com]

Hi @akob-80 ,

 The Analytics API is designed to help sellers monitor sales metrics, track buyer engagement, and benchmark performance. It provides insights into customer service metrics, and eBay standards.

For batch listing products, you can consider using the Inventory API or Sell Feed API . It allows you to create, update, and manage multiple listings efficiently, including bulk inventory management and publishing items to eBay. 

You can learn more about the listing management API here: https://developer.ebay.com/develop/selling-apps/listing-management 

Best Regards,
eBay Developer Support