as_live_… with your key.
1
Add a contact to a list
Upsert contacts by phone. The list is created if it doesn’t exist; the
response includes its
list_id.2
Find a sending number
List your numbers and grab an
id to send from.3
Create the campaign
Pass the
list_id and a number_id. The campaign is built but not yet
sending.4
Start sending
Send a one-off SMS
Skip campaigns entirely for transactional messages:Create a voice agent + voice campaign
Campaign create/start and message send require the platform’s send
infrastructure to be online. Reads (contacts, numbers, agents, campaigns) work
on their own.