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How to apply a custom voice when using the HeyGen Video Agent API?

Hello Admin team,

Creating a video through MCP and getting file not found

One video generation worked but all the ones after, using the same MCP and the same agent (OpenClaw) doesn't work:

Heygen video rendering error

I am trying to create a heygen video for my AI agent. Basically the heygen video should act as a front face of the AI agent where it should be able to talk whatever text the agent gives. I am using free version of the API key and as per documentation, the free version should be able to render the video upto 720p resolution without any errors.

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voice speed control for avatars in FULL mode

Hi HeyGen team,

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Technical Inquiry: Face Selection & Speaker Isolation in Multi-Person Photos (v2 & Avatar 4.0)

Hello Engineering Team,

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Avatar IV endpoint /v2/video/av4/generate always outputs video with background — no transparency support?

The generated video always contains a baked-in background.
We need to place the avatar video on top of another background video, but the output does not include any alpha channel or true transparency.

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Finding and Installing Video Agent API + Claude Code Skill.

I watched this HeyGen video on LinkedIn but simply couldn't follow it; one of the critical steps was rushed or perhaps the speaker just assumed that viewers would know what to do. Anyway, this looks like a great skill if I can work it out. They key step that was missed/rushed in the video was to show where to actually locate and then copy/paste the skill. Is this located somewhere on HeyGen or do i have to go to some other site to access it? Sorry, I normally can follow these things - I know how to create a HeyGen API and how to install a Claude skill but this one had me stumped. So hope someone can help?? Thanks!

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Technical Issue: Persistent 40001 Error on v1/asset Upload Endpoint (Multipart/Form-Data Failure)

Subject: Technical Issue: Persistent 40001 Error on v1/asset Upload Endpoint (Multipart/Form-Data Failure)

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Inconsistency in id returned from list api vs actually availability in the create video api - V2

I am using the Heygen API - https://api.heygen.com/v2 for video creation, on passing in the avatar id fetched from list api for v2 - most of the IDs give the following error -