Services Directory has been disabled

[DeannaDelapasse]

First time user of ArcGIS online - trying to use these cool GeocodeServer services via RESTAPI.  Doing this query:

curl  -H "Accept: application/json" -H "Content-type: application/json" -e http://www.tibco.com -X POST http://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer/find -d "{\"text\":\"Sugar Land, TX 77479\",\"f\":\"json\",\"token\":\"my_token\",\"referer\":\"my_site\"}"

the http post request returns 403 code with "Services Directory has been disabled".

Can someone tell me how to enable this functionality?

thanks!