WhatsApp Groups API: Create Groups, Invites & Broadcasts (Free)

Groups are how communities and ops teams coordinate on WhatsApp. With Omdaa API you can create groups, manage participants, and fetch invite links — free forever.

Series: Free Forever WhatsApp Dev

What you can automate

Create a group with an initial participant list
Add / remove participants
Fetch the invite link
Send group messages
Drive it from Cursor MCP tools

Setup

npm install @omdaafreeapi/omdaa-api-client export OMDAA_API_KEY=your-key

Link a session first: Dashboard → Sessions.

Create a group

const { OmdaaClient } = require('@omdaafreeapi/omdaa-api-client'); const client = new OmdaaClient({ apiKey: process.env.OMDAA_API_KEY }); const group = await client.groups.create({ sessionId: 'default', subject: 'Omdaa Builders', participants: ['201111111111', '201222222222'], }); const groupId = group.data?.id || group.data?.groupId; console.log(groupId);

Invite link & participants

const link = await client.groups.getInviteLink(groupId, { sessionId: 'default' }); await client.groups.addParticipants(groupId, { sessionId: 'default', participants: ['201333333333'], });

MCP equivalents: create_group, add_group_participants, get_group_invite_link, send_group_message.

Send a group message

await client.groups.sendMessage(groupId, { sessionId: 'default', message: 'Ship notes are in the repo — standup in 10.', });

Patterns that work well

Pattern	Use case
Support triage group	Route hot tickets from webhook → group ping
Launch war-room	Temporary group + invite link
Community onboarding	Auto-send invite after signup
Ops alerts	n8n watches metrics → group message

Pair with webhooks

When a customer DMs your business number, optionally notify an internal group:

// inside webhook handler if (needsHuman) { await client.groups.sendMessage(process.env.OPS_GROUP_ID, { sessionId: 'default', message: `Human needed from ${from}: ${text}`, }); }