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Relay Realtime SDK v2

Welcome to the SignalWire Realtime SDK v2 documentation. This version provides multi-language support for building real-time communication applications with persistent WebSocket connections.

Available Languages​

The v2 Realtime SDK is available for the following programming languages:

Node.js

C#

Go

PHP

Python

Ruby

Key Features​

The Realtime SDK v2 provides comprehensive real-time communication capabilities:

  • Voice: Make and receive calls, control call flow, play audio, record calls, detect answering machines, and implement complex IVR systems
  • Messaging: Send and receive SMS/MMS messages with delivery tracking and media support
  • Task: Queue and process background tasks with reliable delivery and retry mechanisms
  • Event System: Real-time event handling with persistent WebSocket connections for all communication channels
  • Call Fabric: Advanced call routing, conferencing, and call control features