# How to Monitor Twilio Uptime

> Twilio provides programmable communication APIs for SMS, voice, video, and messaging, powering notifications and communication features in countless applications.

*Source: https://monitoristic.com/monitor/twilio*

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## Why Monitor Twilio?

Twilio powers critical flows — SMS verification codes, two-factor authentication, appointment reminders, alerts. When Twilio has issues, your users can't receive login codes, your notifications silently fail, and you may not notice until signups drop or complaints roll in.

## What to Monitor

- `your-app.com/api/sms-health` — App endpoint that checks Twilio API reachability
- `status.twilio.com` — Twilio's own status for regional and service-level incidents
- `your-app.com/api/webhooks/twilio` — Your webhook receiver for Twilio delivery callbacks

## What You Should Actually Do

1. Create an app endpoint that checks Twilio API reachability and monitor it externally
2. Monitor your Twilio delivery webhook receiver — if delivery callbacks stop, message delivery may be failing even when the API accepts requests
3. Track Twilio's official status page for regional SMS and voice incidents
4. For critical flows like 2FA, consider a fallback provider — and monitor both so you know when to switch
5. Set up alerts that reach a channel other than SMS — if Twilio is down, an SMS-based alert won't reach you

## Twilio's Official Status Page

Twilio publishes real-time status at https://status.twilio.com. Your own monitor complements it by catching connection-level issues, often before the status page updates.

## Takeaway

Twilio sits in the middle of your most critical user flows — verification, authentication, alerts. When it fails, users get locked out and you often can't tell whether it's your bug or Twilio's outage. Monitoring both the API and your delivery webhooks gives you the answer fast, so you can communicate and fall back instead of debugging blind.

## Frequently Asked Questions

### Can I monitor Twilio's SMS delivery directly?

You can monitor Twilio's API reachability with an HTTP check, and you can track your delivery webhook to see if status callbacks are arriving. Actual end-to-end delivery is harder to test automatically, but monitoring the API plus webhook callbacks catches most issues.

### Why do my SMS messages get accepted but not delivered?

Twilio's API returning 201 Created means it accepted your request, not that the message was delivered. Delivery can still fail or delay due to carrier issues, regional outages, or filtering. Monitor your status callback webhook to detect delivery failures.

### How should I alert myself if Twilio is down?

Don't rely on SMS alerts for Twilio outages — if Twilio is down, the alert won't arrive. Use Telegram or webhook-based alerts (to Slack/Discord) so your downtime notifications don't depend on the service that's failing.

### How is this different from status.twilio.com?

Twilio's status page reports platform-wide incidents by service and region. Your monitor checks how Twilio is working for YOUR app specifically — whether your API calls succeed and your delivery callbacks arrive. Account-specific issues like rate limits or number problems won't appear on Twilio's status page.