The problem
A medical clinic was booking by phone call. Staff time went to scheduling instead of patients, and no-shows had no paper trail.
WhatsApp automation
Clinic booking inside WhatsApp
An appointment. A conversation away.
Patients book an appointment without leaving WhatsApp. No app, no link.
Choose.WhatsApp Flow
Protect.RSA + AES-GCM
Reserve.n8n
Behind the build.
What I built
A 15-screen WhatsApp Flow backed by n8n. Meta requires RSA key exchange and AES-GCM payload encryption on every request, handled entirely in n8n so the clinic runs no server of its own. Deployed on Docker on a VPS.
The result
Passed Meta's health check and went live. Booking happens in the app patients already have open.