How to use WhatsApp Group Participant Joined Webhook

Know the Exact Moment Someone Joins Your WhatsApp Group — and Automatically Update Your Systems

You create a WhatsApp group for a product launch, an onboarding cohort, or a customer community. People start joining. But your CRM has no idea who has joined. Your onboarding system does not know to send a welcome sequence. Your dashboard still shows zero members because no one has manually updated it.

The WhatsApp Group Participant Joined Webhook eliminates this gap. The moment any participant joins a WhatsApp group created through DoubleTick — whether they were added by the business, accepted an invite, or were auto-approved — this webhook fires and sends their details to your connected system instantly.

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What Is the WhatsApp Group Participant Joined Webhook?

In DoubleTick, participants can join a WhatsApp group in multiple ways — they can be directly added by the business, they can use an invite link, or they can be auto-approved through a join request. Regardless of how they joined, the WhatsApp Group Participant Joined webhook fires the moment their membership is confirmed and they become an active member of the group.

Think of it like a check-in scanner at a venue entrance. The moment someone walks through the door — however they got there — the scanner registers their arrival, timestamps it, and sends the record to the system.

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When Does This Webhook Trigger?

This webhook activates when:

• A participant is added to a WhatsApp group by the business through DoubleTick

• A participant joins a group by accepting an invite link

• A participant is auto-approved and joins the group

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Step-by-Step Setup Guide

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Step 1: Open Webhooks in DoubleTick

1. Log in to your DoubleTick account

2. Go to Settings

3. Click on Webhooks

Step 2: Create a New Webhook

1. Click New Webhook

2. Give it a clear name — for example: Group Participant Joined Tracker

Step 3: Get Your Webhook URL

You need a destination URL — this is where DoubleTick will send the participant data the moment someone joins a group.

You can connect it to:

• A CRM like Zoho, HubSpot, or Salesforce

• An automation tool like Zapier or Pabbly

• A spreadsheet like Google Sheets

• Your own backend or internal dashboard

For testing purposes, you can use DoubleTick's Bot Studio to capture and preview the data first:

1. Open a new tab and go to Bot Studio

2. Click Create New Bot

3. Set the trigger to On Webhook

4. Copy the webhook URL that appears

Step 4: Fill in Webhook Details

1. Go back to the Webhooks page

2. Paste the webhook URL

3. Select your API Number (your WABA/WhatsApp Business number)

4. Click Continue

Step 5: Choose the Event

1. Select WhatsApp Group Participant Joined from the event list

2. Click Create Webhook

Your webhook is now live and tracking every new group member the moment they join.

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How to Test It

1. Add a participant to any existing WhatsApp group through DoubleTick, or have someone join via the invite link

2. Go to Bot Studio → Capture Response → View Response Data

You will see the participant's details captured at the exact moment they joined.

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What Data Do You Receive?

When this webhook fires, it sends the following information to your system:

Field	What It Tells You
Group ID	The custom ID of the group the participant joined
Group Name	The name of the WhatsApp group
Customer Phone	The phone number of the participant who joined
Participant Joined At	The exact date and time the participant joined the group

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Sample payload

{
    "groupId": "support_group_001",
    "groupName": "New Support – Jan 2026",
    "customerPhone": "919999999999",
    "participantJoinedAt": "2026-02-10T08:25:10.000Z"
}

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Summary

The WhatsApp Group Participant Joined Webhook turns a simple membership event into a powerful trigger for onboarding, compliance, and CRM workflows. The moment someone joins your group, your systems know — and can act immediately. For businesses that run regulated, structured, or high-volume group communication, this webhook ensures that every new member is captured, acknowledged, and processed correctly from the very first second.

Set it up once, and every group join becomes an automatic action — not a manual task someone might forget.