Outbound SMS - Famulor

Send outbound SMS from a phone number that belongs to your workspace and has Allow outbound SMS enabled.

Who can send SMS

Number source	Requirements	Billing
Marketplace (bought on the platform)	`sms_capable` + outbound SMS enabled	Platform SMS credits including carrier pass-through
Twilio import (BYOC)	Twilio carrier connection, `sms_capable`, outbound SMS enabled, A2P registered for US 10DLC → US	Platform SMS credits only (you pay Twilio carrier cost on your account)

How message length affects cost

SMS is billed per segment, not per message. One segment holds:

160 characters of plain ASCII text, or
70 characters if the message contains anything outside that set — emoji, most accented letters, or a small set of symbols like { } [ ] ~ ^ | €.

A message longer than one segment’s worth of characters is automatically split into multiple segments, each billed at the same per-segment rate shown in the table above. Keeping messages in plain ASCII and under 160 characters is the cheapest and most predictable option.

Enable outbound SMS

Open Settings → Numbers and select the number.
Open the SMS tab (visible when the number is SMS-capable).
Enable Allow outbound SMS.
For US 10DLC numbers, complete A2P 10DLC registration in your Twilio account and wait until the number is linked to an approved campaign.

REST API

curl -X POST "https://{domain}/api/v1/sms/send" \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from_number_id": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
    "to": "+14155550100",
    "body": "Hello from the platform"
  }'

Required scope: phone_numbers:write See also: OpenAPI POST /sms/send, MCP tool send_sms.