elevenlabs Text to Speech API

openapi: 3.2.0
info:
  title: ElevenLabs Audio Isolation Agents Text to Speech API
  description: The ElevenLabs Audio Isolation API removes background noise from audio recordings, isolating vocal tracks from ambient sounds and interference. This is useful for cleaning up recordings, improving audio quality for podcasts and interviews, and preparing audio files for further processing such as voice cloning or transcription.
  version: '1.0'
  contact:
    name: ElevenLabs Support
    url: https://help.elevenlabs.io
  termsOfService: https://elevenlabs.io/terms-of-service
servers:
- url: https://api.elevenlabs.io
  description: Production Server
security:
- apiKeyAuth: []
tags:
- name: Text to Speech
  description: Endpoints for converting text into speech audio with configurable voice, model, and output format settings.
paths:
  /v1/text-to-speech/{voice_id}:
    post:
      operationId: createSpeech
      summary: Create speech
      description: Converts text into speech using a specified voice. Returns audio in the requested format. Supports voice settings overrides and pronunciation dictionary locators for fine-tuned output.
      tags:
      - Text to Speech
      parameters:
      - $ref: '#/components/parameters/voiceId'
      - $ref: '#/components/parameters/outputFormat'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TextToSpeechRequest'
      responses:
        '200':
          description: Audio file generated successfully
          content:
            audio/mpeg:
              schema:
                type: string
                format: binary
        '400':
          description: Bad request - invalid parameters
        '401':
          description: Unauthorized - invalid or missing API key
        '422':
          description: Unprocessable entity - validation error
  /v1/text-to-speech/{voice_id}/stream:
    post:
      operationId: streamSpeech
      summary: Stream speech
      description: Converts text into speech and streams the audio back as chunked transfer encoding. Useful for real-time playback scenarios where latency is important.
      tags:
      - Text to Speech
      parameters:
      - $ref: '#/components/parameters/voiceId'
      - $ref: '#/components/parameters/outputFormat'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TextToSpeechRequest'
      responses:
        '200':
          description: Streaming audio response
          content:
            audio/mpeg:
              schema:
                type: string
                format: binary
        '400':
          description: Bad request - invalid parameters
        '401':
          description: Unauthorized - invalid or missing API key
        '422':
          description: Unprocessable entity - validation error
  /v1/text-to-speech/{voice_id}/with-timestamps:
    post:
      operationId: createSpeechWithTimestamps
      summary: Create speech with timing
      description: Converts text into speech and returns both the audio and word-level timing information. Useful for applications that need to synchronize text display with audio playback.
      tags:
      - Text to Speech
      parameters:
      - $ref: '#/components/parameters/voiceId'
      - $ref: '#/components/parameters/outputFormat'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TextToSpeechRequest'
      responses:
        '200':
          description: Audio with timestamp data
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TimestampedAudioResponse'
        '400':
          description: Bad request - invalid parameters
        '401':
          description: Unauthorized - invalid or missing API key
        '422':
          description: Unprocessable entity - validation error
  /v1/text-to-speech/{voice_id}/stream/with-timestamps:
    post:
      operationId: streamSpeechWithTimestamps
      summary: Stream speech with timing
      description: Converts text into speech and streams the audio along with word-level timing information. Combines the benefits of streaming delivery with timestamp synchronization data.
      tags:
      - Text to Speech
      parameters:
      - $ref: '#/components/parameters/voiceId'
      - $ref: '#/components/parameters/outputFormat'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TextToSpeechRequest'
      responses:
        '200':
          description: Streaming audio with timestamp data
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TimestampedAudioResponse'
        '400':
          description: Bad request - invalid parameters
        '401':
          description: Unauthorized - invalid or missing API key
        '422':
          description: Unprocessable entity - validation error
components:
  schemas:
    VoiceSettings:
      type: object
      description: Voice settings that override the stored settings for the given voice. Applied only on the current request.
      properties:
        stability:
          type: number
          description: Controls the stability of the generated voice. Higher values produce more consistent output, lower values add variability.
          minimum: 0
          maximum: 1
        similarity_boost:
          type: number
          description: Controls how closely the AI adheres to the original voice. Higher values increase similarity to the target voice.
          minimum: 0
          maximum: 1
        style:
          type: number
          description: Controls the expressiveness and style of the speech delivery. Higher values produce more expressive speech.
          minimum: 0
          maximum: 1
          default: 0
        use_speaker_boost:
          type: boolean
          description: Enables speaker boost to increase voice clarity and reduce background artifacts.
          default: true
    TextToSpeechRequest:
      type: object
      required:
      - text
      properties:
        text:
          type: string
          description: The text to convert to speech. Maximum length varies by model.
        model_id:
          type: string
          description: The identifier of the model to use. Use GET /v1/models to list available models. The model must support text to speech.
          default: eleven_monolingual_v1
        voice_settings:
          $ref: '#/components/schemas/VoiceSettings'
        pronunciation_dictionary_locators:
          type: array
          description: A list of pronunciation dictionary locators to apply to the text. Applied in order, with a maximum of 3 locators per request.
          items:
            $ref: '#/components/schemas/PronunciationDictionaryLocator'
          maxItems: 3
        seed:
          type: integer
          description: A seed value for deterministic generation. Using the same seed with the same parameters produces the same audio output.
        previous_text:
          type: string
          description: Text that came before the current text for context continuity.
        next_text:
          type: string
          description: Text that comes after the current text for context continuity.
        language_code:
          type: string
          description: Language code for the text, in ISO 639-1 format. Helps the model produce more accurate pronunciation for the specified language.
    PronunciationDictionaryLocator:
      type: object
      required:
      - pronunciation_dictionary_id
      - version_id
      properties:
        pronunciation_dictionary_id:
          type: string
          description: The identifier of the pronunciation dictionary.
        version_id:
          type: string
          description: The version identifier of the pronunciation dictionary.
    TimestampedAudioResponse:
      type: object
      properties:
        audio_base64:
          type: string
          description: Base64 encoded audio data.
        alignment:
          type: object
          description: Word-level timing information for the generated audio.
          properties:
            characters:
              type: array
              description: Array of characters with their timing information.
              items:
                type: object
                properties:
                  character:
                    type: string
                    description: The character.
                  start_time:
                    type: number
                    description: Start time in seconds.
                  end_time:
                    type: number
                    description: End time in seconds.
  parameters:
    outputFormat:
      name: output_format
      in: query
      required: false
      description: The desired output audio format. Supported values include mp3_44100_128, mp3_44100_192, pcm_16000, pcm_22050, pcm_24000, pcm_44100, ulaw_8000.
      schema:
        type: string
        default: mp3_44100_128
        enum:
        - mp3_22050_32
        - mp3_44100_32
        - mp3_44100_64
        - mp3_44100_96
        - mp3_44100_128
        - mp3_44100_192
        - pcm_16000
        - pcm_22050
        - pcm_24000
        - pcm_44100
        - ulaw_8000
    voiceId:
      name: voice_id
      in: path
      required: true
      description: The identifier of the voice to use for speech synthesis. Use the Voices API to list available voices.
      schema:
        type: string
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: xi-api-key
      description: ElevenLabs API key passed in the xi-api-key header for authentication.
externalDocs:
  description: ElevenLabs Audio Isolation API Documentation
  url: https://elevenlabs.io/docs/api-reference/audio-isolation/audio-isolation