It appears that webhooks are primarily a feature of Prefect Cloud, as indicated by the documentation. In the Cloud version, webhooks can be managed through the Prefect Cloud API, UI, or CLI, but there is no mention of similar functionality for self-hosted Prefect.
Here's the relevant documentation link for Prefect Cloud webhooks:
Prefect Webhook Triggers.
For self-hosted Prefect, you might need to implement custom solutions to handle webhook-like behavior, such as setting up an external service to listen for events and trigger Prefect flows via the Prefect API.
If your team is set on using webhooks in a self-hosted environment, you may need to explore custom implementations or reach out to the Prefect community for more tailored advice.
Let me know if you need further assistance!