Listnr Voices API

openapi: 3.0.3
info:
  title: Listnr Text-to-Speech Jobs Voices 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: Voices
  description: List the AI voices available on Listnr.
paths:
  /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'
components:
  schemas:
    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
    VoicesResponse:
      type: object
      properties:
        voices:
          type: array
          items:
            $ref: '#/components/schemas/Voice'
    Error:
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  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.