About URIs

You send HTTP requests to a URI to perform operations with Bulk API.

The URI where you send HTTP requests has the following format:

Web_Services_SOAP_endpoint_instance_name/services/async/APIversion/Resource_address

Think of the part of the URI through the API version as a base URI which is used for all operations. The part after the API version (Resource_address) varies depending on the job or batch being processed. For example, if your organization is on the na5 instance and you're working with version 33.0 of Bulk API, your base URI would be https://na5.salesforce.com/services/async/33.0.

The instance name for your organization is returned in the LoginResult serverUrl field.