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Overview

SMS alerts are sent to the verified phone number on your account when an incident opens, reopens, or resolves.
SMS is available on the Team and Stack plans. It is not available on Free or Solo.

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Setup

Add Phone Number

Go to Settings → Profile and add your phone number with its country code (for example +1 555-123-4567)

Verify Number

Enter the verification code sent to your phone

Navigate to Monitor

Go to your monitor’s detail page

Open Notifications Tab

Click the “Notifications” tab

Enable SMS

Turn on SMS under the channels of the alert type you want
SMS is sent only to a verified number. Without verification, no SMS is delivered even if the channel is enabled.

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What Gets Sent by SMS

  • Incident alerts (opened, reopened, resolved) for the alert types where SMS is enabled
  • Server alerts you have defined, when SMS is enabled for that alert
Not sent by SMS: SSL and domain expiry reminders, weekly reports, and condition notices such as “frequent short outages”. Those use email and push.

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Message Format

SMS messages are short and carry no link: 
example.com: Availability opened.

example.com: Availability resolved.
For the cause and the duration of the incident, open the email, push notification, or the monitoring page.

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Recipients

SMS goes to one number per user: the verified number on that user’s account. To alert several people, add them as team members or collaborators on the site. Each person then enables SMS in their own notification settings.

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Limits

SMS counts toward your plan’s notification limits, with a daily SMS limit per account. Critical availability incidents are exempt from the limits, up to five per site per channel per day.

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Troubleshooting

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SMS Not Received

  1. Check the phone number format - It must include the country code with +
  2. Check verification - The number must be verified in Settings → Profile
  3. Check the channel - SMS must be enabled for that alert type on that monitor
  4. Check your plan - SMS requires Team or Stack
  5. Check carrier blocking - Some carriers block automated SMS

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Next Steps

Alert Overview

Learn about all notification channels

Push Notifications

Set up mobile app notifications

Slack

Team notifications via Slack channels

Email

Detailed email alerts