Use Meta for Developers to create or select an app, connect the Facebook Page or business asset, request the permissions required for the data you want, and generate a page or system-user access token.
Enter the Facebook Graph API endpoint or your approved data endpoint, use Bearer auth for Meta tokens, set the List Path to the response array, and map the response fields to Yournotify contact fields.
If Test fails, check token expiry, app mode, granted permissions, page ownership, endpoint version, and whether the endpoint returns a JSON list at the List Path you configured.