LOVO AI

LOVO AI Text-to-Speech API

Convert text to speech synchronously or asynchronously and retrieve job results.

Documentation GitHub OpenAPI

Operations 3

POST /api/v1/tts Async TTS #

POST /api/v1/tts/sync Sync TTS #

GET /api/v1/tts/{jobId} Async Retrieve Job #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: LOVO AI Genny Text To Speech API
  version: '1.0'
  description: REST API for LOVO AI's Genny text-to-speech and AI voice generation platform.
  contact:
    name: LOVO AI
    url: https://lovo.ai
servers:
- url: https://api.genny.lovo.ai
  description: Genny API production
security:
- X-API-KEY: []
tags:
- name: Text To Speech
  description: Convert text to speech synchronously or asynchronously and retrieve job results.
paths:
  /api/v1/tts:
    post:
      operationId: async-tts
      summary: Async TTS
      description: Returns a TTS job. Poll the job status with GET /api/v1/tts/{jobId} using the returned id, or supply callbackUrls to be notified on completion.
      tags:
      - Text To Speech
      security:
      - X-API-KEY: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TextToSpeechRequest'
            examples:
              default:
                value:
                  speaker: 640f477d2babeb0024be422b
                  text: Welcome to Genny!
      responses:
        '201':
          description: Job entity used to fetch the status of the TTS job.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GetJobResponse'
        '400':
          description: API key expired
        '401':
          description: API key invalid
        '402':
          description: No active subscription
        '422':
          description: API key not found
  /api/v1/tts/sync:
    post:
      operationId: sync-tts
      summary: Sync TTS
      description: Convert text to speech synchronously. Has a timeout of 90 seconds; if the process does not complete in time, it returns a pending TTS job (like Async TTS) whose status can be checked with GET /api/v1/tts/{jobId}.
      tags:
      - Text To Speech
      security:
      - X-API-KEY: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TextToSpeechSyncRequest'
            examples:
              default:
                value:
                  speaker: 640f477d2babeb0024be422b
                  text: Welcome to Genny!
      responses:
        '201':
          description: Generated audio URLs if completed within 90 seconds, otherwise an incomplete TTS job.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TextToSpeechSyncResponse'
        '400':
          description: API key expired
        '401':
          description: API key invalid
        '402':
          description: No active subscription
        '422':
          description: API key not found
  /api/v1/tts/{jobId}:
    get:
      operationId: async-retrieve-job
      summary: Async Retrieve Job
      description: Retrieve a TTS job by id. Returns generated audio URLs if the job is successfully completed.
      tags:
      - Text To Speech
      security:
      - X-API-KEY: []
      parameters:
      - name: jobId
        in: path
        required: true
        description: The job id returned by an Async or Sync TTS request.
        schema:
          type: string
      responses:
        '200':
          description: The TTS job, including audio URLs when completed.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TextToSpeechResponse'
        '400':
          description: API key expired
        '401':
          description: API key invalid
        '422':
          description: Job not found
components:
  schemas:
    Pause:
      type: object
      description: A pause inserted at a position within the synthesized text.
      properties:
        position:
          type: number
          description: Character position at which the pause is inserted.
        value:
          type: number
          minimum: 0
          maximum: 2
          description: Pause duration in seconds (0 to 2).
      required:
      - position
      - value
    TextToSpeechSyncRequest:
      type: object
      properties:
        text:
          type: string
          minLength: 1
          maxLength: 500
          description: Text to be converted to audio.
          example: Welcome to Genny!
        speaker:
          type: string
          description: Speaker ID retrieved from the Retrieve Speakers endpoint.
          example: 640f477d2babeb0024be422b
        speakerStyle:
          type: string
          description: Speaker style ID for the chosen speaker.
        speed:
          type: number
          default: 1
          minimum: 0.05
          maximum: 3
          description: Speed of the generated audio.
      required:
      - text
      - speaker
    TextToSpeechResponse:
      allOf:
      - $ref: '#/components/schemas/GetJobResponse'
      - type: object
        properties:
          data:
            type: array
            items:
              $ref: '#/components/schemas/TextToSpeechOutput'
        required:
        - data
    Pronunciation:
      type: object
      description: A word-level pronunciation override applied to a TTS conversion.
      properties:
        sourceWord:
          type: string
          description: The original word as written in the input text.
        targetWord:
          type: string
          description: The replacement spelling/phonetic form used for synthesis.
        isReplaced:
          type: boolean
          description: Whether the source word was replaced during synthesis.
      required:
      - sourceWord
      - targetWord
      - isReplaced
    TextToSpeechOutput:
      type: object
      properties:
        status:
          type: string
          enum:
          - pending
          - succeeded
          - failed
          description: Status of the individual TTS output.
        text:
          type: string
        speaker:
          type: string
        speakerStyle:
          type: string
        speed:
          type: number
        pause:
          type: array
          items:
            $ref: '#/components/schemas/Pause'
        emphasis:
          type: array
          items:
            $ref: '#/components/schemas/Emphasis'
        pronunciations:
          type: array
          default: []
          items:
            $ref: '#/components/schemas/Pronunciation'
          description: Pronunciations applied to the TTS request.
        urls:
          type: array
          items:
            type: string
          description: Audio URLs of the TTS result (valid for 24 hours).
        error:
          $ref: '#/components/schemas/JobErrorResponse'
      required:
      - status
      - text
      - speaker
      - speakerStyle
      - speed
      - pause
      - emphasis
      - pronunciations
    JobErrorResponse:
      type: object
      properties:
        code:
          type: string
        message:
          type: string
      required:
      - code
      - message
    TextToSpeechSyncResponse:
      allOf:
      - $ref: '#/components/schemas/GetJobResponse'
      - type: object
        properties:
          data:
            type: array
            items:
              $ref: '#/components/schemas/TextToSpeechOutput'
        required:
        - data
    Emphasis:
      type: object
      description: An emphasis marker applied at a position within the synthesized text.
      properties:
        position:
          type: number
          description: Character position at which emphasis is applied.
        value:
          type: number
          enum:
          - 0.25
          - 0.5
          - 0.75
          description: Emphasis strength.
      required:
      - position
      - value
    TextToSpeechRequest:
      type: object
      properties:
        text:
          type: string
          minLength: 1
          maxLength: 500
          description: Text to be converted to audio.
          example: Welcome to Genny!
        speaker:
          type: string
          description: Speaker ID retrieved from the Retrieve Speakers endpoint.
          example: 640f477d2babeb0024be422b
        speakerStyle:
          type: string
          description: Speaker style ID for the chosen speaker. Only some speakers have multiple styles.
        speed:
          type: number
          default: 1
          minimum: 0.05
          maximum: 3
          description: Speed of the generated audio.
        callbackUrls:
          type: array
          maxItems: 4
          items:
            type: string
          description: Callback URLs for an async job (max 4). A single POST callback with the same payload as the Async Retrieve Job endpoint is sent on completion. Endpoints must return a 2xx within 10 seconds.
      required:
      - text
      - speaker
    GetJobResponse:
      type: object
      properties:
        id:
          type: string
          example: 643e383551e2730025c5ae69
          description: Job ID used to check the progress of the TTS job.
        type:
          type: string
          enum:
          - tts
          - simple_tts
          - dubbing
          - localization
          - subtitles
          description: Type of the job. Currently only TTS is supported.
        status:
          type: string
          enum:
          - in_progress
          - done
        progress:
          type: number
        team:
          type: string
        workspace:
          type: string
        project:
          type: string
        error:
          $ref: '#/components/schemas/JobErrorResponse'
        createdAt:
          type: string
          format: date-time
          description: TTS requested time.
        estimatedTimeAt:
          type: string
          format: date-time
        estimatedTimeMs:
          type: number
        callbackUrls:
          type: array
          items:
            type: string
      required:
      - id
      - type
      - status
      - progress
      - team
      - createdAt
      - callbackUrls
  securitySchemes:
    X-API-KEY:
      type: apiKey
      in: header
      name: X-API-KEY
      description: API key generated at https://genny.lovo.ai (profile tab).