BudgetPixel Sound Effects API

openapi: 3.2.0
info:
  title: Budgetpixel Sound Effects API
  version: '2026-06-20'
  contact:
    email: support@budgetpixel.com
    name: BudgetPixel Support
  description: 'Operations tagged Sound Effects across 2 of this provider''s published API definitions: budgetpixel-openapi.yaml, budgetpixel-openapi.yaml. Each path carries the servers of the definition it was published in.'
servers:
- description: Production
  url: https://api.budgetpixel.com/v1
security:
- ApiKeyAuth: []
tags:
- description: Text-to-sound-effect models (priced per second)
  name: Sound Effects
paths:
  /audios/sonilo-sfx:
    post:
      description: 'Sonilo text-to-sound-effect — Foley, ambience, UI sounds, transitions, impacts and action effects from a short description, 1-180 seconds long. Priced per second of the requested duration with a 3-second minimum (see GET /v1/models for the rate; POST /v1/cost quotes the exact price). MP3 or WAV output.


        **Asynchronous.** Returns a job `id` (the sound effect is not in this response). Poll [`GET /v1/audios/{id}`](/api-reference/audios/get-music-job-status) until `status` is `succeeded` — the clip URL is in that response''s `audio_url`. Charged per second of the requested `duration` (3-second minimum; rate in `GET /v1/models`) on success only; `POST /v1/cost` quotes the exact price.'
      operationId: createAudio_sonilo_sfx
      requestBody:
        content:
          application/json:
            schema:
              properties:
                duration:
                  default: 10
                  description: Length of the effect in seconds (1-180). Billed per second with a 3-second minimum.
                  maximum: 180
                  minimum: 1
                  type: integer
                format:
                  default: mp3
                  description: Output audio format.
                  enum:
                  - mp3
                  - wav
                  type: string
                prompt:
                  description: Description of the sound effect (up to 1000 characters), e.g. "heavy rain on a tin roof with distant thunder".
                  type: string
              required:
              - prompt
              type: object
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CreateAudioResponse'
          description: Job accepted.
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Generate sound effect with Sonilo SFX
      tags:
      - Sound Effects
    servers:
    - description: Production
      url: https://api.budgetpixel.com/v1
  /audios/sonilo-video-sfx:
    post:
      description: 'Sonilo video-to-sound-effect — frame-accurate Foley, ambience, impacts and action sounds synced to the visible events of an input video (up to 6 minutes). Returns the SFX track (`audio_url`, MP3 or WAV) and the video with the effects mixed in (`video_url`). Priced per second of the input video''s measured duration (whole seconds, 3-second minimum) — see GET /v1/models for the rate.


        **Asynchronous.** Returns a job `id` (nothing is generated yet in this response). Poll [`GET /v1/audios/{id}`](/api-reference/audios/get-music-job-status) until `status` is `succeeded` — the SFX track is that response''s `audio_url` and the input video with the effects mixed in is its `video_url`. Charged per second of the input video''s measured duration (whole seconds, 3-second minimum; rate in `GET /v1/models`) on success only.'
      operationId: createAudio_sonilo_video_sfx
      requestBody:
        content:
          application/json:
            schema:
              properties:
                format:
                  default: mp3
                  description: Output audio format of the SFX track.
                  enum:
                  - mp3
                  - wav
                  type: string
                prompt:
                  description: Optional direction for the sound design (up to 1000 characters), e.g. "realistic Foley and ambience, no music".
                  type: string
                video:
                  description: The input video (MP4/WebM, up to 360 seconds, 30 MB remote-fetch cap). A public video URL, an uploaded-file URL from POST /v1/uploads, a data URI, or raw base64. Its duration is measured server-side and is the billing basis.
                  type: string
              required:
              - video
              type: object
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CreateAudioResponse'
          description: Job accepted.
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Generate sound effect with Sonilo Video SFX
      tags:
      - Sound Effects
    servers:
    - description: Production
      url: https://api.budgetpixel.com/v1
components:
  responses:
    Forbidden:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
      description: Authenticated but not permitted (plan gate, ownership, account restriction). Content-moderation blocks are 400, not 403.
    BadRequest:
      content:
        application/json:
          schema:
            oneOf:
            - $ref: '#/components/schemas/Error'
            - $ref: '#/components/schemas/ModerationBlocked'
      description: The request was malformed, referenced an unavailable model, or was blocked by input content moderation (moderation blocks carry a `restriction_reason` — see ModerationBlocked).
    TooManyRequests:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
      description: Rate or queue limit reached. Retry after a short delay.
    Unauthorized:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
      description: Missing or invalid API key.
  schemas:
    ModerationBlocked:
      description: Returned (with HTTP 400) when the input content moderation gate blocks a generation request. The block is a property of the request's prompt or input media — reword the prompt or change the input and retry. Branch on `restriction_reason`, which is stable and machine-readable.
      properties:
        error:
          description: Human-readable explanation of the block.
          type: string
        restriction_reason:
          description: Stable machine-readable block reason.
          enum:
          - input_csam
          - input_explicit_adult
          - input_upload_nudity
          - input_celebrity_likeness
          - strict_model_nsfw
          type: string
      required:
      - error
      - restriction_reason
      type: object
    CreateAudioResponse:
      properties:
        id:
          description: Opaque job id — use it to poll status.
          example: aud_a1b2c3d4e5f6
          type: string
        message:
          type: string
        model:
          type: string
        status:
          $ref: '#/components/schemas/JobStatus'
      type: object
    JobStatus:
      description: Lifecycle state. `succeeded`/`failed`/`timeout` are terminal.
      enum:
      - pending
      - starting
      - processing
      - completing
      - succeeded
      - failed
      - timeout
      type: string
    Error:
      properties:
        error:
          properties:
            code:
              description: Stable machine-readable code.
              example: model_not_available
              type: string
            message:
              type: string
            type:
              description: Error category.
              example: invalid_request_error
              type: string
          required:
          - type
          - code
          - message
          type: object
      required:
      - error
      type: object
  securitySchemes:
    ApiKeyAuth:
      bearerFormat: bpx_live_*
      description: 'API key as a bearer token: Authorization: Bearer bpx_live_xxx'
      scheme: bearer
      type: http
x-refined-from:
- budgetpixel-openapi.yaml
- budgetpixel-openapi.yaml