Kling API v1 enhancements:

  • Added new POST videos/add-sound endpoint for AI-generated video-to-audio conversion with optional original sound preservation
  • Added new GET assets/uploaded endpoint to retrieve user-uploaded assets with filename filtering support
  • Enhanced POST assets response to include fileName field with the generated unique filename
video asset 
curl --location 'https://api.useapi.net/v1/kling/videos/add-sound' \
--header 'Authorization: Bearer user:12345-…' \
--form 'video="https://v15-kling.klingai.com/…"'

Result