> ## Documentation Index > Fetch the complete documentation index at: https://heygen-1fa696a7.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # List Audio Voices > Returns the model-backed audio voices in the caller's workspace, ordered newest first. Use `limit` and `token` to retrieve additional pages. ## OpenAPI ````yaml /openapi/external-api.json get /v3/models/audio/voices openapi: 3.1.0 info: title: HeyGen External API version: 1.0.0 description: >- HeyGen's external API for programmatic AI video creation. See https://docs.heygen.com for full documentation. contact: name: HeyGen Product Infra url: https://heygen.com servers: - url: https://api.heygen.com description: Production security: - ApiKeyAuth: [] - BearerAuth: [] tags: - name: Video Agent description: Create videos from text prompts using AI - name: Videos description: Create, list, retrieve, and delete videos - name: Templates description: Generate videos from reusable templates by replacing their variables - name: Voices description: Text-to-speech and voice management - name: Audio description: Search the background-music and sound-effects catalog - name: Video Translate description: Translate videos into other languages - name: AI Clipping description: Turn long-form videos into ready-to-share short clips with captions - name: Batches description: Create and track batches of videos. - name: Video Translation Batches description: Create and track batches of video translations. - name: Lipsync Batches description: Create and track batches of lipsyncs. - name: Asset Batches description: Create and track batches of direct-to-S3 asset uploads. - name: User description: Account information and billing - name: API Keys description: Inspect the API key authenticating the current request - name: Avatars description: List and manage avatars and looks - name: Assets description: Upload files for use in video creation - name: Webhooks description: Manage webhook endpoints and events - name: Lipsync description: Dub or replace audio on existing videos - name: Brand description: >- Brand-related resources — brand kits (colors, fonts, logos) and brand glossaries (custom term translations) - name: HyperFrames description: Render HyperFrames composition zips into video — separate from /v3/videos - name: Models description: '' - name: Filler Word Removal description: '' paths: /v3/models/audio/voices: get: tags: - Models summary: List Audio Voices description: >- Returns the model-backed audio voices in the caller's workspace, ordered newest first. Use `limit` and `token` to retrieve additional pages. operationId: listModelAudioVoices parameters: - name: limit in: query required: false description: Maximum number of voices to return per page. schema: type: integer minimum: 1 maximum: 100 default: 10 - name: token in: query required: false description: Opaque pagination token returned by a previous request. schema: minLength: 1 type: string responses: '200': description: Successful response content: application/json: schema: type: object properties: data: type: array items: $ref: '#/components/schemas/ModelAudioVoiceResponse' has_more: type: boolean description: Whether more pages are available next_token: type: - string - 'null' description: Opaque cursor for the next page '400': description: Invalid request parameters content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: invalid_parameter message: Invalid pagination token param: token doc_url: null '401': description: Authentication failed content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: unauthorized message: Invalid or expired API key. Verify your x-api-key header. param: null doc_url: null '403': description: Forbidden content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: forbidden message: >- The professional voice cloning API is not enabled for this account. param: null doc_url: null '429': description: Rate limit exceeded content: application/json: schema: type: object properties: error: $ref: '#/components/schemas/StandardAPIError' example: error: code: rate_limit_exceeded message: >- Too many requests. Retry after the duration specified in the Retry-After header. param: null doc_url: null headers: Retry-After: description: Seconds to wait before retrying schema: type: integer security: - ApiKeyAuth: [] - BearerAuth: [] components: schemas: ModelAudioVoiceResponse: additionalProperties: false description: Customer-visible state of one model-backed audio voice. properties: voice_id: description: Stable identifier for this voice. title: Voice Id type: string mode: $ref: '#/components/schemas/ModelAudioVoiceMode' description: Voice creation mode. name: description: Display name of the voice. title: Name type: string language: description: Primary language code supplied when the voice was created. title: Language type: string status: $ref: '#/components/schemas/VideoTTSVoiceStatus' description: 'Current lifecycle state: `PENDING`, `ACTIVE`, or `FAILED`.' created_at: description: Unix timestamp in seconds when the voice was created. title: Created At type: integer failure_reason: anyOf: - $ref: '#/components/schemas/VideoTTSVoiceFailureReason' - type: 'null' default: null description: Stable failure code. Present only when `status` is `FAILED`. required: - voice_id - mode - name - language - status - created_at title: ModelAudioVoiceResponse type: object StandardAPIError: type: object properties: code: type: string description: Machine-readable error code example: invalid_parameter message: type: string description: Human-readable error message example: Video not found param: type: - string - 'null' description: Which request field caused the error doc_url: type: - string - 'null' description: Link to error documentation errors: type: array description: >- Per-item error details for batch/multi-node failures (e.g. graph compilation errors by node). items: $ref: '#/components/schemas/StandardAPIErrorDetail' required: - code - message ModelAudioVoiceMode: description: Supported audio-voice creation implementations. enum: - professional title: ModelAudioVoiceMode type: string VideoTTSVoiceStatus: description: Values persisted in ``video_tts_voices.status``. enum: - PENDING - ACTIVE - FAILED title: VideoTTSVoiceStatus type: string VideoTTSVoiceFailureReason: description: Stable failure codes persisted for terminal training failures. enum: - INVALID_AUDIO - INSUFFICIENT_AUDIO - PREPROCESSING_FAILED - TRAINING_FAILED - DESIGN_FAILED - ARTIFACT_VALIDATION_FAILED - INTERNAL_ERROR title: VideoTTSVoiceFailureReason type: string StandardAPIErrorDetail: type: object properties: code: type: string description: Machine-readable error code example: unknown_node_type message: type: string description: Human-readable error message example: Unknown node type node_id: type: string description: Graph node id this error pertains to, if applicable port: type: string description: Port name on the node this error pertains to, if applicable path: type: string description: Field path within the item this error pertains to, if applicable required: - code - message securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: HeyGen API key. Obtain from your HeyGen dashboard. BearerAuth: type: http scheme: bearer description: OAuth2 bearer token. ````