Selecting Open APIs will show you all registered open APIs
Click on Register a New Application
Name your application. This must be unique on your domain
Enter either your name or the name of the organization responsible for this application
Enter the Support Email. This is the email address that support issues for this application should go to.
Enter the Support URL where users can go to view help documentation and FAQs
Allow your API to either Read Only or Read and Write. Read and Write will allow the API to GET, POST, PULL, and DELETE.
Read and agree to the Terms and Conditions
Click on Submit Registration to finish the process.