openapi: 3.2.0
info:
  title: ModelRush Public Audio API
  version: 2026-09-04.3
  summary: One API for text, image, video, and voice models
  description: Public discovery and representative authenticated ModelRush API contracts. Model and region availability are time-sensitive; call the discovery endpoints before selecting a model or execution region. Authenticated generation operations may create billable usage. Keep API keys server-side. The Apache-2.0 license covers this API description, not access to the hosted service or its underlying implementation. Service use remains governed by the linked terms of service.
  termsOfService: https://modelrush.ai/terms
  contact:
    name: ModelRush
    url: https://modelrush.ai
    email: info@modelrush.ai
  license:
    name: Apache 2.0
    identifier: Apache-2.0
servers:
- url: https://api.modelrush.ai/v1
  description: Production
security:
- bearerAuth: []
tags:
- name: Audio
paths:
  /audio/speech:
    post:
      operationId: createSpeech
      summary: Synthesize WAV speech
      tags:
      - Audio
      x-modelrush-billable: true
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SpeechRequest'
      responses:
        '200':
          description: WAV audio
          content:
            audio/wav:
              schema:
                type: string
                contentMediaType: audio/wav
                contentEncoding: binary
        4XX:
          $ref: '#/components/responses/Error'
  /audio/transcriptions:
    post:
      operationId: createTranscription
      summary: Transcribe audio
      description: Accepts a JSON HTTPS/data-URI audio reference or a multipart audio file.
      tags:
      - Audio
      x-modelrush-billable: true
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TranscriptionRequest'
          multipart/form-data:
            schema:
              type: object
              required:
              - model
              - file
              properties:
                model:
                  type: string
                file:
                  type: string
                  format: binary
                language:
                  type: string
                enable_itn:
                  type: boolean
                region:
                  type: string
      responses:
        '200':
          description: Synchronous transcription
          content:
            application/json:
              schema:
                type: object
                required:
                - id
                - text
                - model
                properties:
                  id:
                    type: string
                  text:
                    type: string
                  model:
                    type: string
                  duration:
                    type: number
                  modelrush_region:
                    type: string
        '202':
          description: Asynchronous transcription Prediction
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Prediction'
        4XX:
          $ref: '#/components/responses/Error'
components:
  schemas:
    TranscriptionRequest:
      type: object
      required:
      - model
      properties:
        model:
          type: string
        audio:
          type: string
        file:
          type: string
        language:
          type: string
        enable_itn:
          type: boolean
          default: true
        parameters:
          type: object
          additionalProperties: true
        region:
          type: string
      anyOf:
      - required:
        - audio
      - required:
        - file
      additionalProperties: true
    SpeechRequest:
      type: object
      required:
      - model
      - input
      - voice
      properties:
        model:
          type: string
        input:
          type: string
        voice:
          type: string
        language_type:
          type: string
        region:
          type: string
      additionalProperties: true
    ErrorObject:
      type: object
      required:
      - code
      - message
      - type
      properties:
        code:
          type: string
        message:
          type: string
        type:
          type: string
      additionalProperties: true
    ErrorResponse:
      type: object
      required:
      - error
      properties:
        error:
          $ref: '#/components/schemas/ErrorObject'
      additionalProperties: true
    Prediction:
      type: object
      required:
      - id
      - status
      properties:
        id:
          type: string
        object:
          type: string
        status:
          type: string
          enum:
          - queued
          - processing
          - succeeded
          - failed
          - cancelled
          - expired
        provider_status:
          type: string
        model:
          type: string
        modelrush_region:
          type: string
        poll_url:
          type: string
        output: {}
        error:
          $ref: '#/components/schemas/ErrorObject'
      additionalProperties: true
  responses:
    Error:
      description: Structured API error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: ModelRush API key
externalDocs:
  description: ModelRush documentation
  url: https://modelrush.ai/docs