PATCHhttps://core-api.heysadie.ai/assistants/{id}/sms-enabled

Set SMS enabled

Enable or disable the **SMS** channel for an assistant. - `smsEnabled`: `true` turns SMS on, `false` turns it off. The value is stored in the assistant's `feature_flags` JSON under the `sms_enabled` key; any other channel flags (e.g. a future WhatsApp toggle) are preserved. When SMS is disabled, the messaging service will not respond to inbound SMS for this assistant's number(s). No messaging prompt is required to toggle this. Enabling requires the assistant to have a linked **Twilio** phone number: the number is attached to the environment's Twilio Messaging Service before the flag is set (idempotent; moves the number if it belongs to another Messaging Service). Enabling fails with 400 (`NO_PHONE_NUMBER_LINKED` / `NON_TWILIO_PROVIDER`) and leaves the flag unchanged when no Twilio number is linked. Disabling only clears the flag: the number intentionally stays in the Messaging Service to avoid A2P campaign re-registration on re-enable.

curl -X PATCH "https://core-api.heysadie.ai/assistants/ASSISTANT_ID/sms-enabled" \
  -H "Authorization: ApiKey YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "smsEnabled": true
  }'