Gumroad License Verification

Hello,

I am attempting to setup a license authorization through Gumraod using the API call. I have looked through the documentation on both Make and Gumroad and I THINK I have the API call correct, I am still getting a 400 - Bad Request error with it.

Below is how I have the API call setup in Make.

For some additional context a webhook listens for an event, then passes the license Key to the API call. I also installed the Make Dev Tools and the API response is “Null”. Any help or a point in the right direction would be greatly appreciated.