DEVELOPER SOLUTIONS
Deliver WhatsApp OTPs & Critical Alerts in Milliseconds
Traditional SMS suffers from carrier delays, deliverability drops, and high international fees. Switch to instant WhatsApp OTP verification and transactional notifications via ChatLoop HQ.
99%+ Deliverability
Bypass carrier filtering, roaming blackouts, and undelivered SMS networks. Messages arrive on customers’ active WhatsApp apps.
Sub-Second Dispatch
Low-latency HTTP endpoints process authentication requests instantly so users never abandon login or checkout flows.
Zero Per-OTP Markup
Stop paying $0.05+ per verification attempt. Send thousands of verification codes on our flat-rate developer plan.
Sending a Verification Code via JSON POST
// POST https://api.chatloophq.com/api/send/text
// Headers: Authorization: Bearer YOUR_CHANNEL_API_KEY
{
"to": "14155552671",
"text": "Your ChatLoop verification code is: 849201. Valid for 5 minutes. Do not share this code."
}Integrate WhatsApp OTP into your app today
Start with 50 free daily messages to test authentication and webhooks in your staging environment.