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Enterprise WhatsApp REST API, Webhooks & VoIP Calling

Programmatically send transactional alerts, OTPs, multimedia broadcasts, receive real-time webhooks, and integrate cloud VoIP calling with standard RESTful APIs.

POST https://api.campaigningtool.com/v1/messages/send
cURL / JSON
curl -X POST "https://api.campaigningtool.com/v1/messages/send" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+15551234567",
    "type": "template",
    "template": {
      "name": "order_confirmation_v2",
      "language": { "code": "en_US" },
      "components": [
        {
          "type": "body",
          "parameters": [
            { "type": "text", "text": "Alexander" },
            { "type": "text", "text": "#ORD-89421" }
          ]
        }
      ]
    }
  }'

Ultra-Low Latency REST API

Send OTPs, transactional receipts, and urgent alerts with sub-second message delivery across 190+ countries.

Bi-Directional Real-Time Webhooks

Receive instant HTTP webhooks for inbound messages, delivery receipts, read status, button clicks, and payment confirmations.

Cloud VoIP In-App Calling

Enable direct VoIP calling from WhatsApp chats to your SIP PBX or web softphone for high-touch customer support.

Meta Cloud API Tier-1 Partner

Ready to 10x Your Customer Engagement on WhatsApp?

Join over 4,500+ global brands leveraging CampaigningTool for automated broadcasts, intelligent AI chatbots, and frictionless WhatsApp sales.

No Credit Card Required
Instant WhatsApp API Setup
Free Meta Green Tick Guidance