Hi, I would love to see Kartra added. I run my whole business on Kartra, so Activepieces is unusable for me at the moment.
For the interim, Kartra does have an API available…not sure how familiar you are with HTTP requests…but you could get some basic automations rolling while you wait for an integration and/or post your requirement in the Marketplace. Otherwise, feel free to let others chime in. I don’t use Kartra and don’t know how to create pieces, unfortunately. But I may be able to help with the HTTP requests if that’s the avenue you want to go.