Real-time media at scale on Meta's Cloud API

Marketplaces live or die on the buyer–seller conversation. Ours needed to feel native: instant messages, voice and video, and rich media, all reliable enough to trust with a sale.

Transport choices

Meta's WhatsApp Cloud API handles reliable delivery and template dispatch; Socket.io carries live presence and negotiation; Agora does the calls. The trick is making three transports feel like one thread.

A shared media gallery, custom audio/video players and configurable notification sounds close the gap between "web app" and "the app people already trust".