A list of all Google APIs, designed to answer the question "What are the best APIs for Google?" All major Web APIs and mobile API resources related to Google, including those formatted in XML or JSON and those for use with iOS and the iPhone, are featured on this list. An API (or Application Programming Interface) is a method software applications and programs use to interact with one another, and share data, rules, settings or specifications. APIs interact with applications, libraries, operating systems and more, and are often used for sharing or embedding content. Some of the most popular APIs used around the modern Web are the Google API, the Twitter API, Wikipedia's API and the Ruby API.
1
13 0
Google Issue Tracker Data View and update issues on Google Project Hosting
2
17 1
Google Client Authentication Account authentication for installed applications
3
13 1
Google OpenID OpenID login for Google account users
4
13 1
Google Gears Geolocation User geographical positioning service
5
13 1
Google Earth Mapping and 3D geo visualization
6
14 3
Google Health Health data service
7
12 3
Google Directions Driving directions web service
8
12 3
Google Email Settings Allows administration of Google Apps email accounts
9
10 2
Google Documents List Document management services
10
11 3
Google Custom Search Google custom search management
11
11 4
Google Distance Matrix Travel distance based on Google Maps
12
9 3
Google Desktop Desktop search and gadgets
13
11 5
Google Diacritize Language pronunciation tool
14
5 0
Google APIs Discovery Google API directory service
15
6 1
Google Homepage Portal gadgets
16
7 2
Google Finance Portfolio Investing portfolio services
17
8 3
Google Code Search Code search service
18
7 3
Google Fusion Tables Data sharing and visualization platform
19
7 3
Google Gmail OAuth EMail service
20
4 0
Google Storage Online storage service
21
4 0
Google AJAX Language Text translation service
22
4 0
Google AdWords Search advertising
23
4 0
Google Analytics Web analytics service
24
8 5
Google Contacts Contact list management
25
7 4
Google Friend Connect Social network service
26
3 0
Google App Engine Developer platform
27
3 0
Google Site Verification Website owner verification service
28
3 0
Google Cloud Print Cloud printing service
29
3 0
Google AJAX Libraries Content distribution network for AJAX libraries
30
3 0
Google Ajax Feeds Access RSS and Atom feeds with JavaScript
31
6 4
Google Font Web font service
32
6 4
Google Books Book search services
33
6 4
Google Gears Tools for offline browser extensions
34
4 2
Google Ajax Search Web search components
35
2 0
Google Visualization Display and visualization of structured data
36
2 0
Google Tasks Personal task list service
37
2 0
Google Search Search services
38
2 0
Google Spreadsheets Online spreadsheets
39
2 0
iGoogle Themes Google homepage design service
40
4 3
Google Apps Profiles Data Update and retrieve Google Apps profiles
41
4 3
Google Apps Email Migration Migrate existing email systems to Google Apps
42
4 3
Google Checkout Shopping cart services
43
4 3
Google Apps Marketplace Integrate Google billing services with applications
44
1 0
Google Moderator Tool for collection and ideas, questions and recommendations
45
1 0
Google Prediction Artificial intelligence service
46
1 0
Google Virtual Keyboard Vritual keyboard service
47
1 0
Google Shared Spaces Collaborative widget service
48
1 0
Google O3D 3D API for web browsers
49
1 0
Google Translator Toolkit Document translation service
50
1 0
Google Picasa Photo management and sharing service
