---
title: "How do I invoke an Event function?"
url: https://docs.catalyst.zoho.com/en/faq/serverless/invoke-event-functions/
description: "Event Functions can only be invoked when the event configured in Catalyst Signals has occurred. If the event you require has not occurred yet, you can perform …"
last_updated: 2026-11-13T05:00:22Z
service: Serverless
type: faq
---

Event Functions can only be invoked when the event configured in Catalyst Signals has occurred. If the event you require has not occurred yet, you can perform an appropriate operation that will trigger Signals to invoke the event function automatically. You can also test event functions from the CLI by passing sample payloads and validating their execution.