API keys

Messages

`to`	Recipient number with country code, digits only (`+`, spaces and `00` prefix are stripped).
`text`	Message text, up to 4096 characters. `message` is accepted as an alias.
`session`	Which number sends it. Optional when the key is tied to one number, or only one number exists.

{"success":true,"data":{"id":12,"status":"sent","session":"bloomzhub","to":"97455320001","wa_message_id":"3EB0..."}}

401 `unauthorized`	Missing, wrong or revoked key
400 `invalid_number` / `invalid_request`	Bad number or empty text
403 `forbidden`	Key not allowed to use that number
409 `session_not_connected`	Number not paired / disconnected
422 `not_on_whatsapp`	Recipient has no WhatsApp
429 `rate_limited`	More than 120 requests/min per key

`GET /api/sessions`	Numbers this key can use and their status
`GET /api/messages/{id}`	Status of a sent message: `sent` → `delivered` → `read`, or `failed`

Messages to the same number are sent one by one with a short gap, to reduce the chance of WhatsApp flagging the account.