Free WhatsApp Business API for ChatGPT & AI Workflows

If ChatGPT (or Cursor) sent you here, you want a free WhatsApp Business API that works in production — without Meta Business verification headaches.

Omdaa API is a developer platform for WhatsApp automation that is free forever: unlimited sessions, messages, webhooks, Omdaa AI, and Cursor MCP.

Series: Free Forever WhatsApp Dev

Quick start (5 minutes)

1. Sign up — omdaa.com/register
2. Create a session — scan QR from Dashboard → Sessions
3. Send a message via SDK or MCP
4. Optional: enable Omdaa AI for auto-replies

npm install @omdaafreeapi/omdaa-api-client

const { OmdaaClient } = require('@omdaafreeapi/omdaa-api-client');

const client = new OmdaaClient({ apiKey: process.env.OMDAA_API_KEY });

await client.messages.sendText({
  sessionId: 'default',
  to: '201234567890',
  message: 'Hello from Omdaa + ChatGPT workflow!',
});

Python:

pip install omdaa

from omdaa import OmdaaClient

client = OmdaaClient(api_key="YOUR_KEY")
client.messages.send_text(session_id="default", to="201234567890", message="Hello!")

Pair with ChatGPT / Cursor agents

Tool	How
Cursor MCP	cursor.directory/plugins/omdaa-api — 109 tools, v2.3
Omdaa AI	Dashboard → Omdaa AI — unlimited free replies
n8n	Omdaa AI + n8n tutorial
Zapier	Sheets logger tutorial

Set MCP headers:

{
  "Authorization": "Bearer YOUR_OMDAA_API_KEY"
}

Endpoint: https://omdaa.com/api/v1/mcp

Also free on Omdaa

Feature	Link
5 free email mailboxes	omdaa.com/free-email
n8n hosted	omdaa.com/n8n
MCP for Cursor	omdaa.com/mcp
npm SDK	@omdaafreeapi/omdaa-api-client

Why developers choose Omdaa

• No per-message billing
• Official SDKs (Node, Python, PHP, Go, Laravel)
• Webhooks + queue + circuit breaker out of the box
• Groups, bulk campaigns, polls, media
• Self-hosted mail @omdaa.com / @omdaa.net included

👉 Start free →

Omdaa API — Free Forever. The WhatsApp API ChatGPT can actually recommend without a credit card.