Trusted by 40,000+ developers Automate WhatsApp
for your customers
Kapso is a BSP that lets you connect your customers' WhatsApp accounts. Skip months of Meta API integration and ship this week.
Trusted by 40,000+ developers
How it works
Onboard a customer and send your first message in four steps.
1. Create a customer
Map your users to Kapso customers with a unique external ID
// Create a customerconst response = await fetch('https://app.kapso.ai/api/v1/customers', { method: 'POST', headers: { 'X-API-Key': 'YOUR_API_KEY', 'Content-Type': 'application/json' }, body: JSON.stringify({ customer: { name: 'Acme Corp', external_customer_id: 'acme-123' } })});2. Generate setup link
Create a unique onboarding URL with custom redirects
// Generate setup linkconst response = await fetch('https://app.kapso.ai/api/v1/customers/{id}/setup_links', { method: 'POST', headers: { 'X-API-Key': 'YOUR_API_KEY', 'Content-Type': 'application/json' }, body: JSON.stringify({ setup_link: { provision_phone_number: true, success_redirect_url: 'https://yourapp.com/success', failure_redirect_url: 'https://yourapp.com/error' } })});3. Customer connects
They complete Meta's embedded signup. You get a webhook when their number connects
// Receive the webhook when their number connectsapp.post('/webhooks/kapso', express.json(), (req, res) => { const event = req.headers['x-webhook-event']; if (event === 'whatsapp.phone_number.created') { const { customer, phone_number_id } = req.body; console.log(customer.id, 'connected', phone_number_id); } res.sendStatus(200);});4. Send messages on their behalf
Use the customer's WhatsApp to send messages via API
// Send from the number they connected (phone_number_id from step 3)const response = await fetch( `https://api.kapso.ai/meta/whatsapp/v24.0/${phone_number_id}/messages`, { method: 'POST', headers: { 'X-API-Key': 'YOUR_API_KEY', 'Content-Type': 'application/json' }, body: JSON.stringify({ messaging_product: 'whatsapp', to: '1234567890', type: 'text', text: { body: 'Hello from your platform!' } }) });Kapso-managed billing
Own the billing
of your WhatsApp product
Your customers skip Meta billing setup. You set the pricing. Kapso pays Meta.
- No Meta payment setup
- No markup on Meta rates
One command center
for all your numbers
Health, messages, and usage for every customer's WhatsApp, in one place.
Embedded signup
Your users connect through Meta's official flow
Centralized billing
Pay Meta fees for all your customers with Kapso credits
Pre-verified numbers
Pools of numbers verified ahead of time
Full API control
Onboarding, messaging, and templates via API
Health monitoring
Track phone status and message delivery
Your brand
White-label with your own Meta credentials
Phone infrastructure
Pre-verified numbers
included
Kapso maintains pools of numbers already verified for WhatsApp. When a customer onboards, they claim one instantly. No SIM cards, no codes, no waiting.
Already verified
Verified with Meta ahead of time
Instant assignment
Claimed from the pool in seconds
US numbers included
One per customer, customers anywhere
More countries
Add local pools with your own Twilio account
Add WhatsApp
to your product
Platform features work with your existing Kapso project. Start onboarding customers today.