The Salesforce.com Pardot API supports the use of online platforms to create and curate marketing campaigns. This API can be used to monitor and measure the activities of web visitors, including existing and potential customers. The Pardot interface uses a connector to automate its integration and syncing with the Salesforce website. The Salesforce.com Pardot API sends HTTP-formatted requests and returns XML- or JSON-formatted responses. All its requests must be preceded by API key authentication.