Sendly SMS API Documentation

Sendly provides a modern, developer-friendly API for sending SMS messages worldwide. Our platform is designed to be simple, reliable, and easy to integrate.

Key Features

• SMS Messaging - Send SMS to 50+ countries with high deliverability. Alphanumeric sender IDs supported for international messaging.
• Pay As You Go - Simple credit-based pricing. Buy credits and only pay for what you use. No monthly fees.
• API Keys - Separate test and live keys. Rotate keys with grace periods. Full control over your integrations.
• Sandbox Testing - Test your integration without sending real messages. Special test phone numbers for different scenarios.

Quick Start

curl -X POST https://sendly.live/api/v1/messages \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"to": "+15551234567", "text": "Hello from Sendly!", "messageType": "marketing"}'

Base URL

All API requests should be made to: https://sendly.live/api/v1

Documentation Sections

• Quickstart Guide - Send your first SMS in 5 minutes
• Authentication - API key authentication with Bearer tokens
• Send SMS - POST /api/v1/messages endpoint
• Message History - Retrieve and filter messages
• Scheduled Messages - Schedule SMS for future delivery
• Batch Messages - Send up to 1000 messages at once
• Phone Verification (OTP) - One-time passwords for 2FA
• Webhooks - Real-time delivery status callbacks
• SDKs - Official SDKs for 9 languages
• CLI - Command-line interface
• Sandbox Testing - Test without real messages
• Error Codes - Error handling reference
• Rate Limits - Request limits and quotas