hello good day, I am a developer and I currently have a client that requires the use of this api, I filled out the form and answered the questions that were sent to my email, I need to be approved to use the sandbox, I would like help on this topic, thanks
Thanks for reaching out.
This seems to be related to advertising API.
You must have received an email after onboarding with advertising. You can reply to the onboarding email you received from Amazon advertising.