Send an SMS
Send an outbound SMS from a workspace phone number that has outbound SMS enabled (platform marketplace or Twilio BYOC). US 10DLC senders must be registered with an approved A2P campaign in Twilio. Platform numbers charge SMS credits including carrier pass-through; BYOC charges only the platform SMS fee (customer pays Twilio carrier cost). Required scope: phone_numbers:write.
Authorizations
API key (fam_..., created under Settings → API Keys) or an OAuth 2.0 access token (fam_at_...). Keys can be restricted to scopes such as assistants:read, calls:write, campaigns:write, automations:read, dashboards:read, dashboards:write, leads:write, segments:write, phone_numbers:write, sip_trunks:write, knowledge:write, voices:read, billing:read, settings:write, platform:read, platform:write; a *:write scope implies the matching *:read. Automation and dashboard endpoints also accept the legacy calls:* scope. Keys without scope restrictions have full access.
Body
Response
SMS accepted.