Every item number I am putting it says it's invalid. Have tried several. when will be fixed? thanks

Hello Andrea,

Thanks for the report. This is working now. eBay had hard-expired our app token without telling us.

I hope this has been explained to your satisfaction. Thank you for writing in, and please let me know if you have any other questions.

problem still persistent - please try putting this number: 136582178629
It's says not a correct number when I know it is.

I regret the confusion. It will work now. eBay's docs are a bit confusing.