WebRTC signaling server

The essential coordination hub that exchanges connection metadata (SDP and ICE candidates) to establish direct peer-to-peer media streams.

WebRTC enables high-performance browser communication, but peers need a roadmap to find each other. The signaling server provides this: it acts as a secure relay for Session Description Protocol (SDP) offers and Interactive Connectivity Establishment (ICE) candidates. Most production environments utilize Node.js with Socket.io or Go-based frameworks (like Pion) to manage these initial handshakes over WebSockets. Because the WebRTC specification does not mandate a specific signaling protocol, developers have the flexibility to use any bidirectional channel to bypass NAT firewalls and sync connection states. This setup ensures that Peer A and Peer B can successfully negotiate codecs and network paths before the direct data transfer begins.

https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API/Signaling_and_video_calling