> ## Documentation Index > Fetch the complete documentation index at: https://docs.protoface.com/llms.txt > Use this file to discover all available pages before exploring further. # Welcome to Protoface > Add realtime, high-fidelity avatars to your AI app or agent with the Protoface API.
Protoface avatars displayed as realtime video tiles
## About Protoface Protoface adds high-quality realtime avatars to your AI app or agent, with a drop-in integration for your existing stack. It converts your agent's audio into realtime face video, so it works across languages with both speech-to-speech realtime models and STT/LLM/TTS pipelines. Protoface's next-generation models need only a single input image and spin up custom avatars in seconds. The majority of existing low-cost realtime avatar approaches rely on Gaussian-based models, which are much slower to generate custom avatars and lower in fidelity. Protoface solves this problem. ## Start here Protoface works with any stack through the REST API, and integrates with many voice AI platforms, SDKs, and frameworks. The [Quickstart](/quickstart) walks through a complete, runnable agent in a few minutes, and [More Integrations](/guides/more-integrations) lists every supported platform. Run a sample Protoface avatar agent end to end. Configure the plugin and session lifecycle. Render Pipecat assistant audio as avatar video. Quickstarts for Vapi, Agora, VideoSDK, and more. ## Reference Use these pages when you need endpoint details, error handling, limits, or usage data. Endpoint schemas generated from OpenAPI. Stable error codes and retry behavior. Session caps, usage rounding, and credit behavior. Read account-level session and billing totals.