Page tree
Skip to end of metadata
Go to start of metadata

This section contains information pertaining to user authentication and entitlement within the Margin Service API.   



To initiate a session with CORE's API, the client must make a request passing in the username and password parameters within the HTTP request headers. These credentials must be a valid CME Group Login or API ID.  

Upon successful login, the Margin Service API will return a session ID in the sessionId HTTP response header. 


Entitlement for API calls are determined by the CME Group API ID used for authentication and by completing a standard API license with CME. To create a new API ID, create a login at, then follow steps to create an API ID. Please reach out to to discuss licensing access to the API.

Entitlements are provisioned by CME CORE system administrators. Entitlement management is not available through the Margin Service API.