How to Customize Your Error Notification Flow?

The Error Notification flow captures failures from other flows, allows you to customize the error message, and forwards alerts to destinations such as Slack, email, or databases.

When a flow fails, Fastn can automatically forward errors to a notification flow. By default, this is fastnErrorNotification. You can customize it to format error messages, enrich them with extra context, or forward alerts to external systems.

• In your flow, go to the right-hand sidebar → Settings → Configuration.

• Under Error Notification, toggle Enable Error Notification.

• Open the fastnErrorNotification flow.

• This flow starts with an On API Request trigger.

• Inside this flow, you can:

  • Map values from the incoming error.

  • Alter the error message.

  • Optionally, add any other steps as needed.

• Save your changes.

With this setup, you have control over how error messages are handled and displayed for your flow.