Debugging – Graph API – Documentation – Facebook for …

facebook-api-version:v2.0. This facebook-api-version header allows you to determine whether API calls are being returned from the version that you expect. Debug Info for Reporting Bugs. When reporting a bug in the Graph API, we include some additional request headers to send with your bug report to help us pinpoint and reproduce your issue.

https://developers.facebook.com/docs/graph-api/using-graph-api/debugging