# Alert Channels

- Alert channels are used to send notifications when checks and monitors fail or recover.
- Alert channels are added to checks, monitors, and check groups constructs by adding them to the `alertChannels` array property.

Here are some examples of how to create different types of alert channels.

All available alerts are described in the [Checkly docs](https://www.checklyhq.com/docs/constructs/overview/).

*Important*: Don't make up email addresses, phone numbers, Slack channel names or similar static values. Scan the project to discover a valid configuration or ask what the values should be.

For new Slack notifications, prefer `SlackAppAlertChannel`. It uses the Checkly Slack App and only needs Slack `#channel` names or `@user` handles in `slackChannels`.

## Email Alert Channel

**Reference:** https://www.checklyhq.com/docs/constructs/email-alert-channel/

```typescript
import { EmailAlertChannel } from 'checkly/constructs'

export const testEmailAlert = new EmailAlertChannel('example-email-alert-channel', {
  address: 'test@example.com',
  sslExpiry: true,
})
```

## Phone Call Alert Channel

**Reference:** https://www.checklyhq.com/docs/constructs/phone-call-alert-channel/

```typescript
import { PhoneCallAlertChannel } from 'checkly/constructs'

export const testUserPhoneCallAlert = new PhoneCallAlertChannel('example-call-alert-channel', {
  name: 'Test User',
  phoneNumber: 'INSERT_PHONE_NUMBER',
})
```

## Slack App Alert Channel

**Reference:** https://www.checklyhq.com/docs/constructs/slack-app-alert-channel/

```typescript
import { SlackAppAlertChannel } from 'checkly/constructs'

export const alertsOpsAliceSlackAppAlert = new SlackAppAlertChannel('example-slack-app-alert-channel', {
  slackChannels: [
    '#alerts',
    '#ops',
    '@alice',
  ],
})
```

## Telegram Alert Channel

Sends alerts to a Telegram chat via a bot. Use the optional `messageThreadId` property to post into a specific forum topic within a Telegram group.

**Reference:** https://www.checklyhq.com/docs/constructs/telegram-alert-channel/

```typescript
import { TelegramAlertChannel } from 'checkly/constructs'

export const opsTelegramTelegramAlert = new TelegramAlertChannel('example-telegram-alert-channel', {
  name: 'Ops Telegram',
  apiKey: 'INSERT_TELEGRAM_API_KEY',
  chatId: 'INSERT_TELEGRAM_CHAT_ID',
  messageThreadId: 'INSERT_TELEGRAM_THREAD_ID',
})
```

## Incident.io Alert Channel

Sends alerts to Incident.io via the webhook URL and API key created when installing the Checkly integration.

**Reference:** https://www.checklyhq.com/docs/constructs/incidentio-alert-channel/

```typescript
import { IncidentioAlertChannel } from 'checkly/constructs'

export const opsIncidentsIncidentioAlert = new IncidentioAlertChannel('example-incidentio-alert-channel', {
  name: 'Ops Incidents',
  url: 'INSERT_INCIDENTIO_URL',
  apiKey: 'INSERT_INCIDENTIO_API_KEY',
})
```

## Microsoft Teams Alert Channel

Sends alerts to a Microsoft Teams channel via an incoming webhook URL.

**Reference:** https://www.checklyhq.com/docs/constructs/msteams-alert-channel/

```typescript
import { MSTeamsAlertChannel } from 'checkly/constructs'

export const opsTeamsTeamsAlert = new MSTeamsAlertChannel('example-msteams-alert-channel', {
  name: 'Ops Teams',
  url: 'INSERT_MSTEAMS_URL',
})
```