WhatsApp OTP API

WhatsApp OTP API
for login and verification

Deliver one-time passwords where users actually read them. Integrate OTP into signup, login, and transaction confirmation flows.

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How it works

Drop WhatsApp OTPs into your auth stack

Generate the code in your app, then call FlareSend to deliver it on WhatsApp. Works with Node, PHP, Python, Laravel, and any HTTP client.

Send short verification codes with a single API request
Higher open rates than SMS in many African markets
Pair with webhooks for delivery and inbound replies
Use the same API for password resets and 2FA
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How FlareSend connects: You link your own WhatsApp number by scanning a QR code, then call a simple REST API. Setup is fast and does not require Meta Cloud API business verification. For very large official-template campaigns, Meta’s Cloud API may still be a better fit — see the comparison.

Send an OTP message

curl -X POST https://api.flaresend.com/send-message \
  -H "Authorization: Bearer YOUR_INSTANCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "recipients": ["2547xxxxxxx"],
    "type": "text",
    "text": "Your FlareSend code is 482901. It expires in 5 minutes."
  }'

FAQ

Quick answers

Can I use this for banking-grade OTP?

FlareSend is great for product auth and SME verification. Regulated industries should review compliance requirements and may need official Meta Cloud API.

How fast are OTPs delivered?

Typical delivery is near real-time when the linked WhatsApp session is online. Keep retries and expiry logic in your app.

Do users need to save my number?

Messages come from your linked WhatsApp number. For best delivery, keep content short and avoid spammy patterns.

WhatsApp OTP APIfor login and verification

Drop WhatsApp OTPs into your auth stack

Quick answers

Related guides

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WhatsApp OTP API
for login and verification