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

If you're running this as a Node.js application, and you're coming from the The Facebook Quickstart Guide mentioned in the question, you'll have to point the webhook URL to [your-server-root]/webhook. Notice this part of the tutorial:

// Adds support for GET requests to our webhook
app.get('/webhook', (req, res) => {
    ...
    // Responds with the challenge token from the request
    res.status(200).send(challenge);
});