Voice call button

Send a voice_call interactive message to add a call button to a message. Every parameter is optional.

REST API

curl -X POST 'https://api.kapso.ai/meta/whatsapp/v24.0/647015955153740/messages' \
  -H 'X-API-Key: YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "messaging_product": "whatsapp",
    "recipient_type": "individual",
    "to": "15551234567",
    "type": "interactive",
    "interactive": {
      "type": "voice_call",
      "body": {
        "text": "Need help with your order? Call us."
      },
      "action": {
        "name": "voice_call",
        "parameters": {
          "display_text": "Call support",
          "ttl_minutes": 1440,
          "payload": "order-4471"
        }
      }
    }
  }'

Parameters

Field	Type	Description
`display_text`	string	Button label, 20 characters or fewer. Defaults to `Call Now`.
`ttl_minutes`	integer	Minutes the button stays active, between 1 and 43200. Defaults to 10080 (7 days).
`payload`	string	Tracking string, 512 characters or fewer. Returned as `cta_payload` in call webhooks.

Omit action.parameters entirely to use Meta’s defaults:

{
  "type": "voice_call",
  "body": { "text": "Need help with your order? Call us." },
  "action": { "name": "voice_call" }
}

Getting started

WhatsApp

For your team

Onboard customers

Automations

Migrate to Kapso

Parameters

​Parameters

Parameters