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Facebook Webview Whitelisting
Facebook allows webviews to be shown within the conversation between a bot and its user. These webviews are typically made of small applications that contain logic that is not possible to show within the default Facebook templates – like buttons and carousels.
If you add a webview to a Facebook Messenger bot, the domain that hosts this webview has to be whitelisted. But only the domains that you enter as a webview on our platform have to be whitelisted.
You can add a webview by adding a button template, and adding a new button with the type
Fill in this template with the right copy and URL and optional parameters that are passed on to the webview.