---
title: "Can I customize webhook headers and parameters using event schema properties?"
url: https://docs.catalyst.zoho.com/en/faq/signals/webhook-headers-params/
description: "Yes, Catalyst Signals lets you customize webhook headers and parameters with static or variable values from event payloads using JSON path. When you create the …"
last_updated: 2026-11-13T05:00:22Z
service: Signals
type: faq
---

Yes, Catalyst Signals lets you customize webhook headers and parameters with static or variable values from event payloads using JSON path.

When you create the webhook, enter each header or parameter key with a static value, a dynamic value in the format `{{event_data_key_name}}`, or a placeholder in the format `{{static_value}}`. Then select the webhook as a target in a rule, and assign the values in the **Placeholders** section. For variable values, provide the JSON path of the payload key. Each webhook supports up to 25 unique headers and parameters.

Refer to the [Creating a Webhook help page](https://docs.catalyst.zoho.com/en/signals/help/webhooks/create-webhook/) for details.