🚀 Twilio™ Fallback Service

A service that provides a fallback mechanism for Twilio SMS messages using SMSGate.

📖 Overview

Many companies using Twilio's SMS API encounter challenges maintaining optimal deliverability rates, especially concerning evolving industry requirements. Existing software built for Twilio often lacks the flexibility to integrate with alternative SMS gateways without significant code modifications.

This Twilio Fallback Service provides a solution by acting as a bridge between Twilio and SMSGate. It intercepts Twilio failure webhooks, extracts the necessary message details, and reroutes the messages via SMSGate, enabling seamless fallback without requiring any changes to the existing Twilio-based software.

📝 Description

The Twilio Fallback Service handles Twilio message failure callbacks and resends failed messages via the SMSGate API. This service ensures that critical messages are delivered even if the primary Twilio channel fails.

📖 Table of Contents

• 🚀 Twilio™ Fallback Service
  • 📖 Overview
  • 📝 Description
  • 📖 Table of Contents
  • 🚀 Getting Started
    • ⚙️ Prerequisites
    • 📦 Installation
      • 1. Pre-built Binaries
      • 2. Docker Image
  • ⚙️ Configuration
  • 🚀 Deployment
    • Local Deployment
    • Docker Deployment
  • 📄 License
  • ⚖️ Legal Notice

🚀 Getting Started

⚙️ Prerequisites

• Linux VPS with a public IP address
• Docker (if using Docker deployment)
• Domain name and SSL certificate (strongly recommended)

📦 Installation

Choose one of the following installation methods:

1. Pre-built Binaries

Download the appropriate binary for your system from the GitHub Releases page.

2. Docker Image

Alternatively, you can use the Docker image hosted on ghcr.io:

docker pull ghcr.io/android-sms-gateway/twilio-fallback:latest

⚙️ Configuration

Create a .env file in the root directory of the project. Copy the contents from .env.example and fill in the required values.

To enable the fallback mechanism, configure your Twilio account to send message status callbacks to the service's endpoint: [YOUR_SERVICE_URL]/api/twilio. This endpoint will receive webhooks for failed or blocked messages and automatically resend them via SMSGate. For more information on setting up Twilio callbacks, see the Twilio documentation.

The following environment variables are available to configure the service:

Variable	Description	Default
HTTP__ADDRESS	HTTP server address	127.0.0.1:3000
HTTP__PROXY_HEADER	HTTP proxy header	empty
HTTP__PROXIES	Comma separated list of trusted proxies	empty
TWILIO__ACCOUNT_SID	Twilio account identifier	required
TWILIO__AUTH_TOKEN	Twilio authentication token	required
TWILIO__CALLBACK_URL	Publicly accessible URL for Twilio callbacks	Dynamic based on Host header
SMSGATE__BASE_URL	SMSGate API endpoint	https://api.sms-gate.app/3rdparty/v1
SMSGATE__USERNAME	SMSGate API username	required
SMSGATE__PASSWORD	SMSGate API password	required
SMSGATE__TIMEOUT	SMSGate API timeout	1s

🚀 Deployment

Local Deployment

To run the service locally:

./twilio-fallback

Docker Deployment

Run the Docker container:

docker run -p 3000:3000 --env-file .env ghcr.io/android-sms-gateway/twilio-fallback:latest

📄 License

This project is licensed under the Apache 2.0 License - see the LICENSE file for details.

⚖️ Legal Notice

This project is not affiliated with, endorsed by, or sponsored by Twilio. It is an independent project that utilizes the Twilio API.