Can it send to more than one person?

Yes. The on-call list is a comma-separated set of numbers in one workflow variable, and every number on it gets the same text. Rotation by day or hour is a small change to the first logic step, and the setup guide shows where.

What happens if Twilio is down or a number is wrong?

The Twilio step is set to continue on error, and the response to the sender carries the error text instead of a message SID. The sender's log will show the failure. Nothing is retried in the starter build; add a second channel such as Slack or email if you need a fallback.

Do I need a paid n8n plan?

Any n8n plan works. n8n Cloud's Starter tier is enough, and the self-hosted Community Edition is free. Self-hosted needs a public URL for the webhook, which usually means a reverse proxy or a tunnel.

Does it work on Make or Zapier?

Yes. The Make blueprint is in the package and the Zapier version ships as a shared Zap template. Zapier needs Webhooks by Zapier, a premium app on its paid plans. Make's custom webhook module is on every plan, the free one included.

{}TwIn build

Notifications & alerts

Any-system webhook → Twilio SMS to the on-call phone

Text the person on call the moment any system fires a webhook.

Any tool that can send a webhook can now wake a phone. Point your uptime monitor, form, CRM or custom script at one n8n URL and the alert reaches the on-call number as a Twilio SMS within a minute of the event. Built for owners and IT leads who are away from Slack more than they are in it. The sending system gets a receipt back with the Twilio message ID.

How it works

{}
Trigger
HTTP POST received on the n8n webhook URL from any system
Webhook / HTTP API
if
Step 1
Check the secret and read the payload
Requests without the matching header secret are rejected; the rest have their fields (source, severity, message, link) mapped onto one alert shape, whatever system sent them.
Tw
Step 2
Send the SMS to the on-call numbers
One text per number on the on-call list, from your Twilio number: source, severity and message on the first line, the link on the second if there is one.
{}
Step 3
Return a receipt to the sender
The calling system gets a 200 response carrying the Twilio message SIDs, so its own log shows the texts were accepted.

What changes once it runs

A text lands on the on-call phone within a minute of the webhook arriving.
One URL serves every system you own; each sender is told apart by the source field it passes.
Requests without the shared secret are dropped before any SMS is sent.
The sending system receives the Twilio message SIDs in the response, so a delivery can be traced from its log to Twilio's.

What you get

The n8n workflow export, tested end to end before it ships
A setup guide covering the webhook URL, the header secret and the on-call number list
One recorded walkthrough of the first test alert, sent from curl and then from a real monitor
Three sample payloads to test with: a monitoring alert, a form submission and a plain curl call
30 days of email support for setup questions

Before you start

Twilio: an account with an SMS-capable number (the trial number works for testing), plus the Account SID and Auth Token
Recipient numbers verified in Twilio while the account is on trial
For US recipients, the sending number registered for A2P 10DLC or a verified toll-free number; Twilio blocks unregistered US traffic
Any system that can send an HTTP POST with a custom header (most monitors, forms and CRMs can)
n8n Cloud, or a self-hosted n8n reachable from the internet so the webhook URL can be called

Built for

Questions before you buy

Can it send to more than one person?: Yes. The on-call list is a comma-separated set of numbers in one workflow variable, and every number on it gets the same text. Rotation by day or hour is a small change to the first logic step, and the setup guide shows where.
What happens if Twilio is down or a number is wrong?: The Twilio step is set to continue on error, and the response to the sender carries the error text instead of a message SID. The sender's log will show the failure. Nothing is retried in the starter build; add a second channel such as Slack or email if you need a fallback.
Do I need a paid n8n plan?: Any n8n plan works. n8n Cloud's Starter tier is enough, and the self-hosted Community Edition is free. Self-hosted needs a public URL for the webhook, which usually means a reverse proxy or a tunnel.
Does it work on Make or Zapier?: Yes. The Make blueprint is in the package and the Zapier version ships as a shared Zap template. Zapier needs Webhooks by Zapier, a premium app on its paid plans. Make's custom webhook module is on every plan, the free one included.

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