HeyGen avatar3 digital twin

Character

An objectRequired · character

Voice

An objectRequired · voice

Resolution

Video resolution preset (360p, 480p, 540p, 720p or 1080p)Optional · resolution

Audio URL

URL of an audio file for the avatar to lip-sync toOptional · audio_url

Aspect ratio

Aspect ratio of the output video (16:9, 9:16, 4:5, 5:4 or 1:1)Optional · aspect_ratio

Price

Usage based, at the cost the provider reports for the call

Billing

Billed at the exact provider cost, without a per-call cap. The initial reservation is an estimate; additional usage is debited and unused funds are refunded.

Price checked

7 October 2026

Your agent reads the schema and the price with inspect_tool before it runs the tool.

MCP call

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cURL command

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TypeScript

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Tool ID

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• Flux 3 extend videofal.aiUsage based
• Flux 3 extend video draftfal.ai$0.12/s
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• Flux 3 first and last frame to video draftfal.ai$0.06/s
• FLUX 3 image to videofal.aiUsage based
• Flux 3 image to video draftfal.ai$0.06/s
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