---
title: notifications
sidebarTitle: notifications
---

# `prefect.blocks.notifications`

## Classes

### `AbstractAppriseNotificationBlock` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L21" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


An abstract class for sending notifications using Apprise.


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `logger` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/abstract.py#L89" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
logger(self) -> LoggerOrAdapter
```

Returns a logger based on whether the NotificationBlock
is called from within a flow or task run context.
If a run context is present, the logger property returns a run logger.
Else, it returns a default logger labeled with the class's name.

**Returns:**
- The run logger or a default logger with the class's name.


#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/abstract.py#L105" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

Send a notification.

**Args:**
- `body`: The body of the notification.
- `subject`: The subject of the notification.


#### `raise_on_failure` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/abstract.py#L117" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
raise_on_failure(self) -> Generator[None, None, None]
```

Context manager that, while active, causes the block to raise errors if it
encounters a failure sending notifications.


### `AppriseNotificationBlock` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L67" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


A base class for sending notifications using Apprise, through webhook URLs.


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L87" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None)
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

### `SlackWebhook` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L105" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via a provided Slack webhook.

Supports both standard Slack webhooks (hooks.slack.com) and Slack GovCloud
webhooks (hooks.slack-gov.com).

**Examples:**

Load a saved Slack webhook and send a message:
```python
from prefect.blocks.notifications import SlackWebhook

slack_webhook_block = SlackWebhook.load("BLOCK_NAME")
slack_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L145" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

Initialize the Slack webhook client.

This method handles both standard Slack webhooks and Slack GovCloud webhooks.
Apprise's built-in Slack plugin only supports hooks.slack.com, so we need to
manually construct the NotifySlack instance for slack-gov.com URLs to ensure
notifications are sent to the correct host.

See: https://github.com/caronc/apprise/issues/XXXX (upstream issue)


#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L87" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None)
```

### `MicrosoftTeamsWebhook` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L205" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via a provided Microsoft Teams webhook.

**Examples:**

Load a saved Teams webhook and send a message:
```python
from prefect.blocks.notifications import MicrosoftTeamsWebhook
teams_webhook_block = MicrosoftTeamsWebhook.load("BLOCK_NAME")
teams_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L246" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

see https://github.com/caronc/apprise/pull/1172


#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L87" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None)
```

### `PagerDutyWebHook` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L263" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via a provided PagerDuty webhook.
See [Apprise notify_pagerduty docs](https://github.com/caronc/apprise/wiki/Notify_pagerduty)
for more info on formatting the URL.

**Examples:**

Load a saved PagerDuty webhook and send a message:
```python
from prefect.blocks.notifications import PagerDutyWebHook
pagerduty_webhook_block = PagerDutyWebHook.load("BLOCK_NAME")
pagerduty_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L354" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L381" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None)
```

Apprise will combine subject and body by default, so we need to move
the body into the custom_details field. custom_details is part of the
webhook url, so we need to update the url and restart the client.


#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

### `TwilioSMS` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L402" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via Twilio SMS.
Find more on sending Twilio SMS messages in the [docs](https://www.twilio.com/docs/sms).

**Examples:**

Load a saved `TwilioSMS` block and send a message:
```python
from prefect.blocks.notifications import TwilioSMS
twilio_webhook_block = TwilioSMS.load("BLOCK_NAME")
twilio_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L454" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

### `OpsgenieWebhook` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L475" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via a provided Opsgenie webhook.
See [Apprise notify_opsgenie docs](https://github.com/caronc/apprise/wiki/Notify_opsgenie)
for more info on formatting the URL.

**Examples:**

Load a saved Opsgenie webhook and send a message:
```python
from prefect.blocks.notifications import OpsgenieWebhook
opsgenie_webhook_block = OpsgenieWebhook.load("BLOCK_NAME")
opsgenie_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L563" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

### `MattermostWebhook` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L599" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via a provided Mattermost webhook.
See [Apprise notify_Mattermost docs](https://github.com/caronc/apprise/wiki/Notify_Mattermost) # noqa

**Examples:**

Load a saved Mattermost webhook and send a message:
```python
from prefect.blocks.notifications import MattermostWebhook

mattermost_webhook_block = MattermostWebhook.load("BLOCK_NAME")

mattermost_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L667" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

### `DiscordWebhook` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L692" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via a provided Discord webhook.
See [Apprise notify_Discord docs](https://github.com/caronc/apprise/wiki/Notify_Discord) # noqa

**Examples:**

Load a saved Discord webhook and send a message:
```python
from prefect.blocks.notifications import DiscordWebhook

discord_webhook_block = DiscordWebhook.load("BLOCK_NAME")

discord_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L772" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

### `CustomWebhookNotificationBlock` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L796" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via any custom webhook.

All nested string param contains `{{key}}` will be substituted with value from context/secrets.

Context values include: `subject`, `body` and `name`.

**Examples:**

Load a saved custom webhook and send a message:
```python
from prefect.blocks.notifications import CustomWebhookNotificationBlock

custom_webhook_block = CustomWebhookNotificationBlock.load("BLOCK_NAME")

custom_webhook_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L900" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `logger` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/abstract.py#L89" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
logger(self) -> LoggerOrAdapter
```

Returns a logger based on whether the NotificationBlock
is called from within a flow or task run context.
If a run context is present, the logger property returns a run logger.
Else, it returns a default logger labeled with the class's name.

**Returns:**
- The run logger or a default logger with the class's name.


#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L919" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/abstract.py#L105" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```

Send a notification.

**Args:**
- `body`: The body of the notification.
- `subject`: The subject of the notification.


#### `raise_on_failure` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/abstract.py#L117" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
raise_on_failure(self) -> Generator[None, None, None]
```

Context manager that, while active, causes the block to raise errors if it
encounters a failure sending notifications.


### `SendgridEmail` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L933" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Enables sending notifications via any sendgrid account.
See [Apprise Notify_sendgrid docs](https://github.com/caronc/apprise/wiki/Notify_Sendgrid)

**Examples:**

Load a saved Sendgrid and send a email message:
```python
from prefect.blocks.notifications import SendgridEmail

sendgrid_block = SendgridEmail.load("BLOCK_NAME")

sendgrid_block.notify("Hello from Prefect!")
```


**Methods:**

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L978" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `block_initialization` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L48" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
block_initialization(self) -> None
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L1003" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None)
```

#### `notify` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/blocks/notifications.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
notify(self, body: str, subject: str | None = None) -> None
```
