---
title: "Publish Data"
url: https://docs.catalyst.zoho.com/en/sdk/nodejs/v2/cloud-scale/data-streams/publish-data/
description: "This page describes the method to publish real-time data to a Data Streams channel in your Node.js application with sample code snippets."
last_updated: 2026-08-13T11:41:55Z
service: Cloud Scale
type: general
related_links:
  - name: "Publish Data - API"
    url: /en/api/code-reference/cloud-scale/data-streams/publish-data
  - name: "Data Streams"
    url: /en/cloud-scale/help/data-streams/introduction
---

# Publish Data

[Catalyst Data Streams](https://docs.catalyst.zoho.com/en/cloud-scale/help/data-streams/introduction/) enables you to publish real-time data to a channel. Any active subscribers connected to that channel will receive the published data instantly through their WebSocket connections.

The `datastreams` reference used in the code below is the [component instance](https://docs.catalyst.zoho.com/en/sdk/nodejs/v2/cloud-scale/data-streams/get-component-instance) created earlier.

### Publish Data to a Channel

You can publish data to a channel by passing the channel ID and the data payload to the `publishData()` method. You can structure the payload as needed, including fields like `type`, `data`, and `timestamp`. The promise returned here will be resolved to an object confirming the publish operation.

**Parameters Used**

<table class="content-table">
	<thead>
		<tr>
			<th class="w20p">Parameter Name</th>
			<th class="w20p">Data Type</th>
			<th class="w60p">Definition</th>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td>`channelId`</td>
			<td>**String**</td>
			<td>A **Mandatory** parameter. Holds the unique ID of the channel.</td>
		</tr>
		<tr>
			<td>`data`</td>
			<td>**Object**</td>
			<td>A **Mandatory** parameter. Holds the data payload to be published to the channel.</td>
		</tr>
	</tbody>
</table>

```javascript
//Publish data to all subscribers of the channel
const publishRes = await datastreams.publishData(CRICKET_CHANNEL_ID, {
  type: "cricket_score_update",
  data: mockCricketData,
  timestamp: new Date().toISOString()
});
```