Before using the ThreatExchange API, you'll need to create a Facebook app.
Log in to Facebook using the account you'll use to create the app. This must be a real Facebook account.
Go to developers.facebook.com and create a new app. Note that your organization's name must appear in the app name. For example, if your company's name is FizzBuzz, some nice app names include "FizzBuzz ThreatExchange", "FizzBuzz Anti-Malware Team", "FizzBuzz Site Integrity", etc.
Take the app out of development mode. In the App Review section, enable the "Do you want to make this app available to the public" check box.
Please see the Terms and Conditions -- depending on your company, you may wish to obtain signoff from your company's legal team.
... if you haven't already done so.
The name ThreatExchange appears with a green checkmark, and you see the subproducts "Descriptors", "Tags", etc. in addition to "App Review" which you had seen up until now.
Do a power-search for tag "testing" -- you should see results. Please contact us at firstname.lastname@example.org with any issues.
Welcome to ThreatExchange!
Next, continue with the Getting Started page!