FireHydrant
The Prequel plugin for FireHydrant gives you the ability to ingest Prequel detections as Signals alerts. From there, alerts can be routed appropriately based on your preferred rules and on-call schedule.
It provides:
- a Signals event source
Prerequisites
- An existing FireHydrant Signals subscription
Add a Prequel event source (via generic webhook)
Since Prequel provides out-of-the-box support for FireHydrant Signals, you can easily use the generic webhook event source.
Get your Signals webhook URL
First, you need to grab your unique Signals webhook URL.
Log into FireHydrant and navigate to the Signals app.

Select Event Sources from the menu on the left.

You will see a list of available data sources. Generic Webhook should be at the top.

Click the copy icon associated with the Generic Webhook data source. This will place your unique webhook URL on your clipboard.

Turn on the integration in Prequel
Submit a Prequel support ticket by sending an email to support@prequel.dev. Please include the following in your request:
- Signals webhook URL
- The minimum severity (e.g.
medium,high,critical) of the detections you want to send to Signals - Any other filters you wish to apply (e.g. cluster name)
The team will promptly enable your integration.
Once enabled, you'll start seeing logs in the Event Logs view:

✅ Congrats! Your FireHydrant Signals instance is connected to Prequel. You can create alert rules to start routing these events.