From their comments: Starting now we do ask you send a User-Agent header as a best practice. Your agent string should include the app name and ap-id with an optional web url and/or email address. A suggested format is “AppName/Version AppId/appIdNum (+webUrl;contactEmail)”
For example: User-Agent: Really Cool App/1.0 AppId/##### (+www.example.com;contact@example.com)
From their comments: Starting now we do ask you send a User-Agent header as a best practice. Your agent string should include the app name and ap-id with an optional web url and/or email address. A suggested format is “AppName/Version AppId/appIdNum (+webUrl;contactEmail)”
For example: User-Agent: Really Cool App/1.0 AppId/##### (+www.example.com;contact@example.com)