The GData (Google data) APIs provide a simple protocol for reading and writing data on the web.

Each of the following Google services provides a Google data API:
* Base
* Blogger
* Calendar
* Code Search
* Contacts
* Document List
* Google Apps Provisioning
* Notebook
* Picasa Web Albums
* Spreadsheets
* YouTube
The Google data Python client library provides a library and source code that make it easy to access data through Google data APIs.