This page takes you through integrating ConvertKit with Payhip.
You may want to integrate ConvertKit so that you can add buyers to a ConvertKit email marketing campaign or to segment buyers and add them to different forms depending on which product they buy.
Once you login to your Payhip account. Go to Marketing > Mailing List and then click “Setup Mailing Lists”.
Once you do this, select ConvertKit from the drop down menu.
Then login to your ConvertKit account and click on “Account Settings” from the dropdown menu on the right hand side.
Copy and Paste your API key from ConvertKit into Payhip and hit “Save Details”.
You can now go edit your products advanced options to select which list you want your buyers to be added to once they make a successful purchase or free download.