Schedule SMS text messages with Twilio

Send text messages on a schedule through your Twilio account: reminders, daily alerts, and one-time texts at an exact time in any time zone.

#Example: a one-time appointment reminder

{
  "name": "Reminder: Ada, Tue 10:00",
  "run_at": "2026-11-09T18:00:00-05:00",
  "nodes": [
    { "id": "sms", "twilio_send_sms": {
        "credential_id": "YOUR_TWILIO_ACCOUNT_ID",
        "to": "+15551234567",
        "from": "+15557654321",
        "body": "Hi Ada, a reminder of your appointment tomorrow at 10:00 with Dr. Lee. Reply C to cancel." } }
  ]
}

Create one job per reminder from your booking system with POST /alarms. Each fires once and switches itself off.

#Example: text the on-call engineer

{
  "name": "Text today's on-call",
  "cron": { "expression": "0 8 * * *", "time_zone": "America/Denver" },
  "nodes": [
    { "id": "oncall", "pagerduty_list_on_calls": { "credential_id": "YOUR_PAGERDUTY_API_KEY_ID", "escalation_policy": "PABC123", "limit": 1 } },
    { "id": "sms", "twilio_send_sms": {
        "credential_id": "YOUR_TWILIO_ACCOUNT_ID",
        "to": "+15551234567",
        "from": "MG0123456789abcdef0123456789abcdef",
        "body": "You're on call today ({{ $.oncalls[0].schedule.summary }})." } }
  ]
}

#Set up

Save your account SID and auth token as a twilio credential. from is one of your Twilio numbers or a messaging service SID. US numbers need an approved A2P 10DLC registration before carriers deliver your texts.

#Reference

#Send an SMS with Twilio: twilio_send_sms

Sends POST https://api.twilio.com/2010-04-01/Accounts/<sid>/Messages.json with HTTP Basic auth. Output for the next step: The created message, with its sid and status.

#More ideas

• A daily low-stock alert from your store's API.
• A "doors open" text at an exact time for an event, with run_at.
• A weekly reminder to a volunteer rota: 0 17 * * SUN.