Whitelisting the bot host

Important: Failing to whitelist the bot host will cause users to get a 400 error when responding to a date and time picker.
For date and time pickers you need to whitelist the bot host in your Facebook for developers account:
  1. Go to Facebook Settings > Messenger Platform > Whitelisted Domains
  2. Paste in the bot host. This depends on the environment on which the bot is deployed.

    You can get the bot host from the first part of the callback URL on the bot's Integration tab. For example while you are developing the bot, the bot host is typically: