AStack
Developer
Documentation
Build real-time video-to-video AI applications with sub-1000ms response times. AStack provides production-ready APIs for conversational AI with voice, text, and video input.
Architecture
How It Works
1
Your backend creates a session and returns browser-safe gateway and renderer URLs
2
Your frontend connects to the UE-hosted gateway with the Client SDK and embeds the signed renderer player
3
AStack allocates one premium UE runtime per session and routes model calls through the split AI service stack
UE-HOSTED GATEWAY MODEL
Each premium session gets its own UE runtime that owns the customer WebSocket gateway and signed Pixel Streaming player URL. The gateway reaches ASR, VAD, A2F, LLM, and TTS through configured service URLs, so browsers use one session contract without seeing renderer control endpoints or internal Modal service URLs.