Data-center-specific API URLs

API users should use the following data-center-specific base URLs for the Bullhorn REST and SOAP APIs:

U.S. East Coast Data Center


U.S. West Coast Data Center


UK Data Center


CLS2, CLS5, CLS21 etc. are Cluster IDs that are contained in a user’s browser URL (address bar) once they are logged in.

Example: indicates that the logged in user is on CLS21 (therefore the appropriate API URLs to use are for the UK Data Center)
As such Cluster IDs do not change for a customer, so identifying the correct cluster ID for all users for a given customer is a one time exercise.