Facebook blocked API Access to Ping after Failure to Strike Agreement

It’s not as mysterious as it seems, this mini-controversy about finding friends on Facebook for Apple’s new social music network.

According to sources familiar with Facebook’s platform, the social networking giant essentially denied Apple’s Ping access to application programming interfaces that would allow it to search for an iTunes user’s friends on Facebook who also had signed up for Ping.

Normally, this API access is open and does not require permission.

That is, unless some entity wants to access it a lot. In that case, Facebook requires an agreement for reasons primarily centered on protection of Facebook user data and, of course, infrastructure impact.

With 160 million iTunes users, that could potentially mean a lot of impact.