> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cartesia.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# ウォーターマークの検出

> Check audio for a Cartesia watermark. Requires a paid plan.



## OpenAPI

````yaml latest.yml POST /v1/watermark/detect
openapi: 3.0.1
info:
  title: Cartesia API
  version: 0.0.1
servers:
  - url: https://api.cartesia.ai
    description: Production
security: []
paths:
  /v1/watermark/detect:
    post:
      tags:
        - Watermarking
      summary: Detect watermark
      description: Check audio for a Cartesia watermark. Requires a paid plan.
      operationId: detectWatermark
      parameters:
        - $ref: '#/components/parameters/CartesiaVersionHeader'
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              required:
                - file
              properties:
                file:
                  type: string
                  format: binary
                  description: >-
                    Audio file to check, between 3 seconds and 5 minutes long,
                    up to 32 MiB. Supported formats are FLAC, M4A, MP3, MP4,
                    MPEG, MPGA, OGA, OGG, WAV, and WebM.
      responses:
        '200':
          description: Watermark detection result
          content:
            application/json:
              schema:
                type: object
                required:
                  - detected
                properties:
                  detected:
                    type: boolean
                    description: Whether a Cartesia watermark was detected in the audio
              example:
                detected: true
      security:
        - APIKeyAuth: []
components:
  parameters:
    CartesiaVersionHeader:
      name: Cartesia-Version
      in: header
      description: API version header.
      required: true
      schema:
        type: string
        format: date
        example: '2026-08-14'
        default: '2026-08-14'
        enum:
          - '2026-08-14'
  securitySchemes:
    APIKeyAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: >-
        Cartesia API key (`sk_car_...`). Get one at
        [play.cartesia.ai/keys](https://play.cartesia.ai/keys).
      x-default: $CARTESIA_API_KEY

````

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