A WhatsApp number, turned into an API
Link a number by scanning a code. Every message arrives at your app as one JSON object.
No card. When the two days are up, you either pay or the box stops.
Link a number from the phone that holds it.
One POST. One object. No SDK.
Back through the same secret.
The same shape in, the same shape out, for every message on every number you link.
{ "tenant_id": "acme", "line_id": "main", "sent_at": "09:12:04Z", "text": "still waiting" }