Email-list.com provides email marketing and social media tools for businesses. Recently the company announced an Email List API that gives visitors to your website access to counts and quotes on email lists.
The Streak API integrates its client relationship management (CRM) platform into other applications like MailChimps and Wufoo. The API's webpage reveals that it requires an API key and uses HTTP Basic Auth. The request format supports Create, retrieve, update, and delete (CRUD) with response in JSON. The purpose of the API is to manage CRM relationships through your application.