Ask HN: Does Etsy charge for commerical API access?

Howdy! Can anyone help me out with a question regarding Etsy's commercial API access? I have been developing an integration that accelerates the shipping process for ecommerce merchants and allows them to push their products onto Etsy. I am currently using my personal API key for this purpose. Does anyone know if Etsy charges for commercial API access? Thanks in advance for any insights you can provide!