It’s been covered in the press but we wanted to mention that we picked up the Facebook outage yesterday. Starting at 12:00UTC on 10/21 and lasting until 14:30UTC Sharing was pretty much impossible to Facebook, with the service throwing a variety of 400 and 500 errors. We had a successful test at 14:00 but it was followed by more failures.
More interestingly, oAuth, Search and Profile fetch remained completely unaffected.
APImetrics keeps you alerted of outages in APIs you use or provide and give you the tools to track outages down and fix them before clients and users find out.