The Google Data Transfer Python SDK by Google provides the tools to have a Python command-line application that makes requests to the Data Transfer API. The Google Data Transfer API is a service for developers that assists with the management of transferring data from one user to another within a domain.
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.