Using Gumroad and Tumblr
If you are using Tumblr to build a website, you can integrate Gumroad's payment forms into your page.
Getting Started
Add your product and go to your product's Preview page. You can access this by going to your Products dashboard and clicking the diagonal arrow next to your product's name. Then, open a new browser tab.
Sharing the Link
By simply linking to your Gumroad product, your customers will be directed to a new browser tab to complete their purchase. You can set up this buying flow by turning text into a hyperlink to your Gumroad product's URL. Do this by highlighting the text, clicking the link icon, and insert the URL of your producthe URL of your product is the URL of your Preview page.