Logging in is a prerequisite for all calls. For information on obtaining login credentials, see Preparatory Tasks.
To access a tenant via the API, you must first authenticate and establish a session by sending a login request to the following URL:
http://www.zuora.com/apps/services/a/2.0
Note that the final number indicates the release number. In most cases, you will most likely want to be using the latest release, so make sure that your URL is up-to-date.
Make all subsequent calls during a given session to the URL returned in the login response and using the session ID returned by the login response.
Once you are logged in, you can issue API calls.
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