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Omdaa API

Posted on Edited on Originally published at omdaa.com

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

#api #whatsapp #javascript #tutorial

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
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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);
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Invite link & participants 

const link = await client.groups.getInviteLink(groupId, { sessionId: 'default' });

await client.groups.addParticipants(groupId, {
  sessionId: 'default',
  participants: ['201333333333'],
});
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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.',
});
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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}`,
  });
}
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Related tutorials

Omdaa API — Free Forever. Group automation without spinning your own Baileys fleet.

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