# WhatsApp

- Bridges a Friday space to a WhatsApp Business number via Meta's Cloud API (not WhatsApp Web).
- Customer messages land in Studio with a green **WHATSAPP** badge, and replies travel back over the same channel.
- Only sees messages received while Friday is running — Meta does not expose archived history.
- Setup: create a Meta developer app, generate a permanent system user access token, configure webhook subscriptions, then enter the access token, app secret, and phone number ID into Studio.
- Meta's free test number works for development with up to five pre-verified recipients; production requires registering a real business number and clearing OTP verification.
- Constraints: messages cannot be edited after sending, and streaming replies are buffered into a single payload before delivery.