It looks like this would be the option to take, There is no node that we have but it looks like you might be able to use the API through the HTTP Request node.
This Pinterest automation is tricky to set up as it requires both sandbox and production-limited Pinterest Oauth API, as I haven’t gotten approved to use their production API.
Thus, I mix two credentials for Pinterest to execute some functions, e.g., create & search Pinterest boards, and read & write pins in my Pinterest automation.