How to Use Facebook Debugger to Fix Posting Issues - Design Bombs
Michal Špaček on Twitter: "@Scott_Helme Facebook's Sharing Debugger throwing "Can't validate SSL Certificate" & "Curl error: 60 (SSL_CACERT)" is also a bit unexpected. Guess they're using OpenSSL (in curl) that can't build
How to create never expires Access Token for Facebook Page | by Jenananthan | Medium
3. Access Token and User Id — Connectivity Mapping
Is Your Facebook Post Missing an Image to Go With That Link? Use the Facebook Object Debugger. | Schmutzie.com