The sandbox has been broken to the point it is useless for developers for at least a year, and based on the forum posts maybe several years. You cannot use the eBay sandbox to build applications that integrate with eBay. You have to use production accounts and risk getting banned, and spending money on fake things. I guess they don't really want people to provide their customers with options outside of the ones they provide.
Hello yes, What I'm trying to accomplish is the following: We are trying to integrate our warehousing software to pull orders from the ebay sandbox. We want to test the warehouse software ebay api socket functionality. We haven't had any luck thus far. Thank you in advance @ankit_developersupport