HeyGen API Overview HeyGen provides REST APIs to create talking avatar videos, clone voices, translate videos with lip-sync, and stream live avatar sessions. Use it to automate video content production at scale — from personalized sales outreach to multilingual marketing campaigns. Setup Base URL: Core Concepts - Avatar : A digital human that delivers the video. Choose from HeyGen's library or create a custom avatar. - Voice : TTS or cloned voice that speaks the script. - Video : Generated asynchronously; poll for status then download. - Video Translation : Send an existing video URL; HeyGen…