Overview
Summary	Browser based authentication service
Category	Security
Tags	security authentication identity
Date Reviewed	2007-03-27
Description	From their site: You build great web applications. We have millions of users who store their data on Yahoo!. Browser-Based Authentication (BBAuth) makes it possible for your applications to use that data (with their permission). BBAuth also offers a Single Sign-On (SSO) facility so that existing Yahoo! users can use your services without having to complete yet another registration process. The first time a user visits your web site, you redirect them to a specially constructed Yahoo! URL where they can login and grant your application permission.
API Home Page	http://developer.yahoo.com/auth/
Latest API News	Hack Day at Yahoo Yahoo Releases Address Book API
Most Popular Yahoo BBauth Mashups
Yahoo BBauth Developers [View all »]
Protocol
Protocols	REST
WSDL
Data Formats	XML
Service Endpoint	https://api.login.yahoo.com/WSLogin/V1/wslogi ...
Functionality
API Groups
Example API Methods	wslogin
Client Install Required	No
Security
Authentication Model	Application ID
SSL Support	Yes
Read-only Without Login	No
Support
Vendor API Kits	Quickstart Package with PHP classes
Community API Kits
API Blog
API Forum	Yahoo Group
Developer Support
Signup and Licensing
Signup Requirements	Application ID required
Developer Key Required	Application ID
Account with Service Required	Yes
Commercial Licensing
Provider
Non-Commercial Licensing
Data Licensing
Usage Fees	None
Usage Limits	5,000 queries per IP per day per API (Request More)
Terms of Service	API Terms of Service

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