SFDC Integration Error: API Is Not Enabled for This Organization or Partner

[#1]

Issue

Error "API is not enabled for this Organization or Partner" occurs during Marketo - Salesforce integration.

Solution

This is a Salesforce generated error and indicates that API access is not available in your SFDC instance.  For more information, see this Salesforce documentation: http://www.salesforce.com/us/developer/docs/api/Content/sforce_api_calls_concepts_core_data_objects.... .

To resolve this, contact Salesforce to enable API access.