Hi @Sophia_Braun,
You’re currently passing the parameters in Query Params, but the documentation specifies using form data. We only support sending data in the body (type JSON).
However, I have a workaround 
, Add Code piece then click on ASK AI to generate code.
Copy the following prompt:
Send a POST request to https://thrivecart.com/api/external/students, use fetch, pass the bearer token in the header. For the body, it's form data; fill in the email, course_id, and name.
It should generate something like this:
Press “Use Code,” then replace these values as you did in the query parameters.
Let me know if that works.