OTPku

A balance-based SaaS OTP platform — virtual SMS numbers via HeroSMS + virtual emails via QEEX. Auto top-up via 3 gateways, 24 public API endpoints, HMAC webhooks, whitelabel-ready.

// Problem

Apps need disposable OTP channels without managing provider sprawl or billing.

// Approach

Two-channel OTP (SMS + email), API-key auth (otpku_live_), token-bucket rate limiting (60/min), HMAC-SHA256 user webhooks, 3-gateway auto-credit, full whitelabel branding.

// Outcome

24 public REST endpoints, multi-gateway billing, reseller-ready.

// Tech Stack

Next.jsTypeScriptPrismaMySQLAuth.jsREST APIHMAC Webhook