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

# Transcribe an audio file

> Transcribe uploaded audio without creating a library recording.

Requires Editor, Admin, or Owner. Send a `multipart/form-data` request with a binary `file` and optional `language` (default `en`). This uses the configured speech-to-text service and can incur usage.

The response is an object with recognized text in `transcript` when supplied by the provider, for example `{"transcript": "Hello, how can I help?"}`. Additional provider fields may be present; do not rely on an exhaustive fixed payload. It does not register an audio-library entry. Let your HTTP library generate the multipart boundary; do not send a JSON file URL.


## OpenAPI

````yaml POST /api/v1/workflow-recordings/transcribe
openapi: 3.1.0
info:
  title: Bandwidth Agent Builder API
  version: v1
  description: >-
    Manage agents, place calls, and retrieve conversation results in your
    workspace.
servers:
  - url: https://agents.labs.bandwidth.com
    description: Workspace API
security: []
paths:
  /api/v1/workflow-recordings/transcribe:
    post:
      tags:
        - audio
      summary: Transcribe an audio file
      description: >-
        **Authorization:** Requires an Editor, Admin, or Owner role in the
        requested workspace.


        Transcribe uploaded audio without creating a library recording.
      operationId: transcribe_audio_api_v1_workflow_recordings_transcribe_post
      parameters:
        - description: >-
            Required with X-BW-LABS-AGENTS-API-KEY: the positive local workspace
            ID to access. The key owner must be a current member. Missing or
            invalid IDs return 400; non-member workspaces return 403. Not
            required for bearer authentication, which uses the user's selected
            workspace.
          in: header
          name: X-VOAI-ORGANIZATION-ID
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            description: >-
              Required with X-BW-LABS-AGENTS-API-KEY: the positive local
              workspace ID to access. The key owner must be a current member.
              Missing or invalid IDs return 400; non-member workspaces return
              403. Not required for bearer authentication, which uses the user's
              selected workspace.
            title: X-Voai-Organization-Id
      requestBody:
        content:
          multipart/form-data:
            schema:
              $ref: >-
                #/components/schemas/Body_transcribe_audio_api_v1_workflow_recordings_transcribe_post
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                additionalProperties: true
                properties:
                  transcript:
                    description: >-
                      Recognized text when returned by the transcription
                      provider.
                    type: string
                type: object
          description: Successful Response
        '400':
          description: Invalid request or missing/invalid workspace header with an API key.
        '401':
          description: Missing, invalid, or expired credential.
        '403':
          description: >-
            The account lacks access to the workspace, resource, or required
            role.
        '404':
          description: Not found
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
          description: Validation Error
      security:
        - LabsAuth: []
        - LabsApiKey: []
components:
  schemas:
    Body_transcribe_audio_api_v1_workflow_recordings_transcribe_post:
      properties:
        file:
          contentMediaType: application/octet-stream
          title: File
          type: string
        language:
          default: en
          title: Language
          type: string
      required:
        - file
      title: Body_transcribe_audio_api_v1_workflow_recordings_transcribe_post
      type: object
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          title: Detail
          type: array
      title: HTTPValidationError
      type: object
    ValidationError:
      properties:
        ctx:
          title: Context
          type: object
        input:
          title: Input
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          title: Location
          type: array
        msg:
          title: Message
          type: string
        type:
          title: Error Type
          type: string
      required:
        - loc
        - msg
        - type
      title: ValidationError
      type: object
  securitySchemes:
    LabsAuth:
      description: >-
        Bandwidth Labs OAuth access token. Uses the user's selected workspace;
        the workspace header is not required. Do not also send an API key.
        Bearer-only operations may additionally require the Labs `super_user`
        role.
      scheme: bearer
      type: http
    LabsApiKey:
      description: >-
        Bandwidth Labs API key. Also send `X-VOAI-ORGANIZATION-ID` with a
        positive local workspace ID belonging to the key owner. Access follows
        the owner's current workspace role. Do not also send a bearer token. API
        keys cannot access bearer-only or Labs `super_user` operations.
      in: header
      name: X-BW-LABS-AGENTS-API-KEY
      type: apiKey

````

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