Facebook Messenger API: Trouble setting up a webhook

Question

I am trying to set up a web hook for the new Facebook Messenger bot platform on my PHP webserver and am receiving this error:

The URL couldn\'t be val

Answer 1

Not sure if this help, but the query parameters that FB send are with underscore not dot e.g. :

• hub_verify_token
• hub_mode
• hub_challenge

P.S.

Sorry, this is valid for PHP