Listnr Voices API

openapi: 3.0.3
info:
  title: Listnr Text-to-Speech API
  description: >-
    The Listnr Text-to-Speech API converts SSML text or an article URL into
    MP3/WAV speech using Listnr's catalog of 1,000+ AI voices across 142+
    languages. Conversion can be synchronous (returns an audio URL directly) or
    asynchronous (returns a jobId that is polled for status). The API also lists
    available voices and reports async job status. All requests are authenticated
    with a personal API key generated in the Listnr dashboard
    (voices.listnr.tech) and passed in an x-listnr-token header. Never expose the
    API key in front-end code or the browser. Endpoints and parameters in this
    document are transcribed from Listnr's public API documentation at
    github.com/team-listnr/text-to-speech-api; request/response schemas are
    modeled from that documentation and should be verified against the live API.
  version: '1.0'
  contact:
    name: Listnr AI
    url: https://listnr.ai
servers:
  - url: https://bff.listnr.tech/api/tts/v1
    description: Listnr Text-to-Speech API
security:
  - listnrToken: []
tags:
  - name: Text-to-Speech
    description: Convert SSML text or an article URL into audio.
  - name: Voices
    description: List the AI voices available on Listnr.
  - name: Jobs
    description: Poll the status of asynchronous conversion jobs.
paths:
  /convert-text:
    post:
      operationId: convertText
      tags:
        - Text-to-Speech
      summary: Convert SSML text to speech (synchronous)
      description: >-
        Synchronously converts SSML text into audio and returns the resulting
        audio URL.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ConvertTextRequest'
      responses:
        '200':
          description: Audio generated successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SyncConversionResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /convert-text-async:
    post:
      operationId: convertTextAsync
      tags:
        - Text-to-Speech
      summary: Convert SSML text to speech (asynchronous)
      description: >-
        Queues an asynchronous conversion of SSML text and returns a jobId to
        poll via the job-status endpoint.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ConvertTextRequest'
      responses:
        '200':
          description: Job accepted.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AsyncConversionResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /convert-url:
    post:
      operationId: convertUrl
      tags:
        - Text-to-Speech
      summary: Convert an article URL to speech (synchronous)
      description: >-
        Synchronously converts the readable content of an article URL into audio
        and returns the resulting audio URL.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ConvertUrlRequest'
      responses:
        '200':
          description: Audio generated successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SyncConversionResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /convert-url-async:
    post:
      operationId: convertUrlAsync
      tags:
        - Text-to-Speech
      summary: Convert an article URL to speech (asynchronous)
      description: >-
        Queues an asynchronous conversion of an article URL and returns a jobId
        to poll via the job-status endpoint.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ConvertUrlRequest'
      responses:
        '200':
          description: Job accepted.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AsyncConversionResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /available-voices:
    get:
      operationId: listAvailableVoices
      tags:
        - Voices
      summary: List available voices
      description: >-
        Returns the voices available on Listnr, optionally filtered by language,
        gender, and style.
      parameters:
        - name: lang
          in: query
          required: false
          description: Filter voices by language.
          schema:
            type: string
        - name: gender
          in: query
          required: false
          description: Filter voices by gender.
          schema:
            type: string
        - name: style
          in: query
          required: false
          description: Filter voices by style or tone.
          schema:
            type: string
      responses:
        '200':
          description: A list of available voices.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/VoicesResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /job-status:
    get:
      operationId: getJobStatus
      tags:
        - Jobs
      summary: Get async job status
      description: >-
        Returns the status of an asynchronous conversion job by jobId, plus the
        audio URL and audio key when the job has completed.
      parameters:
        - name: jobId
          in: query
          required: true
          description: The identifier of the job to check.
          schema:
            type: string
      responses:
        '200':
          description: Job status.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JobStatusResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  securitySchemes:
    listnrToken:
      type: apiKey
      in: header
      name: x-listnr-token
      description: >-
        Personal API key generated in the Listnr dashboard at voices.listnr.tech.
        Keep it server-side; never expose it in the browser or front-end code.
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    ConvertTextRequest:
      type: object
      required:
        - voice
        - ssml
      properties:
        voice:
          type: string
          description: The voice identifier to synthesize with.
        ssml:
          type: string
          description: The text to convert, in SSML format with paragraph tags.
        voiceStyle:
          type: string
          description: Optional tone or accent of the voice.
        globalSpeed:
          type: string
          description: Playback speed as a percentage string, e.g. "100%" (20-200).
        audioFormat:
          type: string
          enum:
            - mp3
            - wav
          description: Output audio format.
        audioSampleRate:
          type: integer
          enum:
            - 24000
            - 48000
          description: Output audio sample rate in Hz.
        audioKey:
          type: string
          description: Optional key referencing an existing audio file to update.
    ConvertUrlRequest:
      type: object
      required:
        - voice
        - url
      properties:
        voice:
          type: string
          description: The voice identifier to synthesize with.
        url:
          type: string
          format: uri
          description: The article URL whose readable content will be converted.
        voiceStyle:
          type: string
          description: Optional tone or accent of the voice.
        globalSpeed:
          type: string
          description: Playback speed as a percentage string, e.g. "100%" (20-200).
        audioFormat:
          type: string
          enum:
            - mp3
            - wav
          description: Output audio format.
        audioSampleRate:
          type: integer
          enum:
            - 24000
            - 48000
          description: Output audio sample rate in Hz.
        audioKey:
          type: string
          description: Optional key referencing an existing audio file to update.
    SyncConversionResponse:
      type: object
      properties:
        success:
          type: boolean
        audioUrl:
          type: string
          format: uri
          description: URL of the generated audio file.
        audioKey:
          type: string
          description: Key identifying the generated audio file.
    AsyncConversionResponse:
      type: object
      properties:
        jobId:
          type: string
          description: Identifier of the queued conversion job.
        audioKey:
          type: string
          description: Key that will identify the generated audio file.
    VoicesResponse:
      type: object
      properties:
        voices:
          type: array
          items:
            $ref: '#/components/schemas/Voice'
    Voice:
      type: object
      properties:
        voice:
          type: string
          description: The voice identifier.
        language:
          type: string
          description: The language of the voice.
        gender:
          type: string
          description: The gender of the voice.
        supportedStyles:
          type: array
          description: Voice styles supported by this voice.
          items:
            type: string
    JobStatusResponse:
      type: object
      properties:
        jobId:
          type: string
        status:
          type: string
          enum:
            - PENDING
            - IN_PROGRESS
            - COMPLETED
            - FAILED
        audioUrl:
          type: string
          format: uri
        audioKey:
          type: string
    Error:
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string