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Kapso Platform lets your customers connect their own WhatsApp Business accounts without sharing credentials. Each customer uses their own number while you handle the automation.

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Quick example

// 1. Create customer
const customer = await createCustomer({ name: 'Acme Corp' });

// 2. Setup link
const setupLink = await generateSetupLink(customer.id);
console.log(`Setup link: ${setupLink.url}`);

// 3. Send message
await sendWhatsAppMessage({
  customer_id: customer.id,
  phone_number: '+1234567890',
  content: 'Order confirmed!'
});

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Use cases

Perfect when you need your customers to use their own WhatsApp:
  • CRM platforms - Let each client connect their WhatsApp for customer communication
  • Appointment booking - Clinics and salons send reminders from their own number
  • E-commerce tools - Stores send order updates using their WhatsApp Business
  • Marketing platforms - Agencies manage multiple client WhatsApp accounts
  • Support software - Each company provides support through their WhatsApp

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Step 1: Create a customer

curl -X POST https://api.kapso.ai/platform/v1/customers \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "customer": {
      "name": "Acme Corporation",
      "external_customer_id": "CUS-12345"
    }
  }'
Response: 
{
  "data": {
    "id": "customer-abc123",
    "name": "Acme Corporation",
    "external_customer_id": "CUS-12345"
  }
}

curl -X POST https://api.kapso.ai/platform/v1/customers/customer-abc123/setup_links \
  -H "X-API-Key: YOUR_API_KEY"
Response: 
{
  "data": {
    "id": "link-xyz789",
    "url": "https://app.kapso.ai/whatsapp/setup/aBcD123...",
    "expires_at": "2024-03-15T10:00:00Z"
  }
}
Share the url with your customer. They’ll click it, log in with Facebook, and connect their WhatsApp in ~5 minutes.

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Step 3: Send messages

After setup completes, use the customer’s phone_number_id to send messages: 
curl -X POST https://api.kapso.ai/meta/whatsapp/v21.0/110987654321/messages \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "messaging_product": "whatsapp",
    "to": "15551234567",
    "type": "text",
    "text": {
      "body": "Your order has been shipped!"
    }
  }'

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JavaScript example

const KAPSO_API_KEY = 'YOUR_API_KEY';
const PLATFORM_API_URL = 'https://api.kapso.ai/platform/v1';
const WHATSAPP_API_URL = 'https://api.kapso.ai/meta/whatsapp';

async function onboardCustomer(customerData) {
  // 1. Create customer
  const customer = await fetch(`${PLATFORM_API_URL}/customers`, {
    method: 'POST',
    headers: {
      'X-API-Key': KAPSO_API_KEY,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({ customer: customerData })
  }).then(r => r.json());

  // 2. Generate setup link
  const setupLink = await fetch(
    `${PLATFORM_API_URL}/customers/${customer.data.id}/setup_links`,
    {
      method: 'POST',
      headers: { 'X-API-Key': KAPSO_API_KEY }
    }
  ).then(r => r.json());

  return setupLink.data.url;
}

async function sendMessage(phoneNumberId, recipientPhone, message) {
  return fetch(`${WHATSAPP_API_URL}/v21.0/${phoneNumberId}/messages`, {
    method: 'POST',
    headers: {
      'X-API-Key': KAPSO_API_KEY,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      messaging_product: 'whatsapp',
      to: recipientPhone,
      type: 'text',
      text: { body: message }
    })
  });
}

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What customers see

  1. Click your setup link
  2. Log in with Facebook
  3. Connect their WhatsApp Business
  4. Verify phone number
  5. Done - you can now send messages
The entire process takes ~5 minutes.

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Next steps