# Get a presigned URL to upload a custom ambient noise audio file

> POST /api/v1/workflow/ambient-noise/upload-url — request parameters and responses from the Menace Voice API schema.

`POST /api/v1/workflow/ambient-noise/upload-url`

{/* Generated by scripts/sync_docs_api.mjs. Edit the API schema source to change the contract. */}

See [authentication](/api-reference/authentication) for workspace API access. Public embed and artifact endpoints use their documented session or access tokens.

## API contract for documentation tools

Generated from the OpenAPI schema. Do not infer a different parameter type from an example. Authentication headers are alternatives as explained in the authentication guide.

### Parameters

| Name | Location | Type | Required | Description and constraints |
| --- | --- | --- | --- | --- |
| authorization | header | string or null | no |  |
| X-API-Key | header | string or null | no |  |

### Request body: application/json

Required body. Schema: AmbientNoiseUploadRequest (object).

| Field | Type | Required | Description and constraints |
| --- | --- | --- | --- |
| workflow_id | integer | yes |  |
| filename | string | yes |  |
| mime_type | string | no | default: "audio/wav" |
| file_size | integer | yes | Max 10MB maximum: 10485760 |

### Response 200

Successful Response

application/json: AmbientNoiseUploadResponse (object).

| Field | Type | Required | Description and constraints |
| --- | --- | --- | --- |
| upload_url | string | yes |  |
| storage_key | string | yes |  |
| storage_backend | string | yes |  |

### Response 404

Not found

### Response 422

Validation Error

application/json: HTTPValidationError (object).

| Field | Type | Required | Description and constraints |
| --- | --- | --- | --- |
| detail | array of ValidationError (object) | no |  |

## OpenAPI

````yaml api-reference/openapi.json post /api/v1/workflow/ambient-noise/upload-url
openapi: 3.1.0
info:
  title: Menace Voice API
  description: API for Menace Voice agents
  version: 1.0.0
servers:
  - url: https://voice.menaceui.com
    description: Production
  - url: http://localhost:8000
    description: Local development
paths:
  /api/v1/workflow/ambient-noise/upload-url:
    post:
      tags:
        - main
      summary: Get a presigned URL to upload a custom ambient noise audio file
      description: Generate a presigned PUT URL for uploading a custom ambient noise file.
      operationId: get_ambient_noise_upload_url_api_v1_workflow_ambient_noise_upload_url_post
      parameters:
        - name: authorization
          in: header
          required: false
          schema:
            anyOf:
              - type: string
              - type: "null"
            title: Authorization
        - name: X-API-Key
          in: header
          required: false
          schema:
            anyOf:
              - type: string
              - type: "null"
            title: X-Api-Key
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/AmbientNoiseUploadRequest"
      responses:
        "200":
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/AmbientNoiseUploadResponse"
        "404":
          description: Not found
        "422":
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/HTTPValidationError"
components:
  schemas:
    AmbientNoiseUploadRequest:
      properties:
        workflow_id:
          type: integer
          title: Workflow Id
        filename:
          type: string
          title: Filename
        mime_type:
          type: string
          title: Mime Type
          default: audio/wav
        file_size:
          type: integer
          maximum: 10485760
          exclusiveMinimum: 0
          title: File Size
          description: Max 10MB
      type: object
      required:
        - workflow_id
        - filename
        - file_size
      title: AmbientNoiseUploadRequest
    AmbientNoiseUploadResponse:
      properties:
        upload_url:
          type: string
          title: Upload Url
        storage_key:
          type: string
          title: Storage Key
        storage_backend:
          type: string
          title: Storage Backend
      type: object
      required:
        - upload_url
        - storage_key
        - storage_backend
      title: AmbientNoiseUploadResponse
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: "#/components/schemas/ValidationError"
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
````