This PHP Library is the official client reference for accessing the Block.io API from an application written in PHP. Block.io API offers a secure wallet and payment service for transacting the three most common cryptocurrencies (Bitcoin, Doge, & LiteCoin). The Block.io API can be used to return balances, conduct withdrawals and account maintenance, and return user IDs & addresses associated with a specific account.
It's not often we see an API "go on sale". But that's what Google is doing with their announced a Google AdWords API. They have a new version update but along with it, they have "holiday season API sale pricing". The details of the holiday sale are spelled out in the October 20 AdWords API blog post "Happy Holidays! Enjoy more API units":