SendAPI Introduction

SendAPI is a unified developer platform for sending WhatsApp messages, transactional SMS, OTP codes, and transactional emails through a single, elegant REST API.

Instead of juggling multiple vendors, webhooks, and billing accounts, SendAPI provides a single interface to reach your users globally across their preferred channels.

Core Services

1. WhatsApp Business API

With SendAPI, you can spin up a WhatsApp Session in seconds by pairing any WhatsApp number via QR code — no Meta Business verification required. Send messages, build interactive conversational bots, and receive real-time events through our Webhooks. Learn about the WhatsApp API →

2. SMS & OTP Verification

Send critical alerts and two-factor authentication (2FA) codes globally. Our Smart Routing engine ensures the highest delivery rates by seamlessly failing over between tier-1 telecom carriers. Learn about the SMS API →

3. Transactional Email

Deliver password resets, receipts, and notifications instantly. We provide dedicated IP pools, customizable HTML templates, and full open/click tracking. Learn about the Email API →

Developer Experience First

SendAPI was built by developers, for developers. We prioritize:

• Idempotency: Safely retry requests without accidentally double-charging customers.
• Type-Safe SDKs: Official libraries for Node.js, Python, and PHP (coming soon).
• Global Webhooks: Real-time delivery receipts and inbound message events.

Next Steps

Get started by obtaining an API key and sending your first message in under 5 minutes.

Ready to build?

Head to the Quick Start Guide to send your first message.