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POST
Design a Voice

Authorizations

x-api-key
string
header
required

HeyGen API key. Obtain from your HeyGen dashboard.

Body

application/json

Request body for POST /v3/voices — design a voice via semantic search.

prompt
string
required

Natural language description of the desired voice (e.g., 'warm, confident female narrator').

Required string length: 1 - 1000
gender
string | null

Filter by gender: 'male' or 'female'.

locale
string | null

BCP-47 locale tag to filter by (e.g., 'en-US', 'pt-BR').

seed
integer
default:0

Controls which batch of results to return. seed=0 returns the top matches, seed=1 the next batch, etc. Same prompt + seed always returns the same voices.

Required range: x >= 0

Response

Successful response

data
DesignVoiceResponseData · object

Response payload for POST /v3/voices.