Our API directory now includes 30 authentication APIs. The newest is the Yubikey API. The most popular, in terms of mashups, is the Google Client Authentication API. We list 6 Google Client Authentication mashups. Below you’ll find some more stats from the directory, including the entire list of authentication APIs.


In terms of the technical details, REST and XML lead the way. There are 22 authentication REST APIs and 3 authentication JavaScript APIs. Our directory lists 19 authentication XML APIs and 11 authentication JSON APIs.

The most common tags within authentication are 27 security authentication APIs, 10 identity authentication APIs and 4 internet authentication APIs.
On the mashup side, we list just one authentication mashup. For reference, here is a list of all 30 authentication APIs.
Aadhaar UIDAI Authentication API: Online authentication for Indian citizens
AOL Open Auth API: Authentication services
Apigee OAuth API: OAuth authentication across several APIs
AT&T Notary Management API: Digital signature service
Atlassian Crowd API: Single Sign On service
AuthDog API: Authentication creation service
BeenVerified API: Authentication services
Cumulo Authorize API: Authentication services
DuoFactor API: Web authentication service
Enole API: Mobile Authentication Service
FreeYourID API: Online identity authentication services
Gigya API: Single Sign-In/Registration Service
Google Client Authentication API: Account authentication for installed applications
Google Single SignOn API: Authentication for Google Apps
Google Web Authentication API: Account authentication proxy for web-based applications
Kinamik Data Integrity API: Tamper evident and digital evidence ready data
Lanoba API: Website registration and authentication service
LiveEnsure API: Website and app authentication service
MyPW Authentication API: Authentication services
OpenStack API: Authentication for cloud service
Orange Authentication API: Authentication service
Rackspace Cloud Identity API: Cloud services authentication service
TokBox API: Authentication services
Vidoop API: Secure authentication service
VoiceVault API: Voice biometric identity verification
Windows Live ID Client SDK API: Windows SDK for Windows Live sign-in authentication
Windows Live ID Web Authentication API: Web based authentication service
Yahoo BBauth API: Browser based authentication service
Yahoo Create Consumer Key API: Yahoo consumer API key creation service
Yubikey API: Cloud-based authentication and validation service





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One Response to “30 Authentication APIs: Google, AOL, Windows Live and Yahoo”
at 6:27 am
Why Facebook Connect isn’t listed? Don’t you consider it as an authentification system?