Verify your domain in minutes, send with one HTTP call and track every delivery, bounce and open in real time. European infrastructure, automatic suppression and signed webhooks.
Create free account View the API3,000 free emails/month · 1 domain included · No credit card
# Envía tu primer email en 10 segundos curl -X POST https://zend24.com/api/v1/emails \ -H "Authorization: Bearer sk_live_xxxx" \ -H "Content-Type: application/json" \ -d '{ "from": "Facturación <facturas@tudominio.com>", "to": "cliente@ejemplo.com", "subject": "Tu factura de julio", "html": "<h1>Gracias por tu compra</h1>" }' → {"id": "01J2ZK7QW9PXVN4T8MHBGC5R2D"} 200 OK · 94ms
Built by developers for real production.
Connect Cloudflare, OVH or GoDaddy and we create the DKIM, SPF and DMARC records for you. No copy-pasting.
Hard bounces and spam complaints are blocked automatically. Your sender reputation, protected by default.
delivered / bounced / opened events with HMAC-SHA256 signatures and exponential-backoff retries.
sk_test_ keys that log everything without sending anything. Develop without fear.
Save your HTML once, send with {{name}}. Automatic escaping against injection.
TOTP 2FA, Argon2id, hashed API keys shown only once, rate limits and full audit trail.
Start free, scale when you need to.