> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base39.com.br/llms.txt
> Use this file to discover all available pages before exploring further.

# Set file metadata

> Update metadata for specific fields. Each field is updated independently to avoid concurrency conflicts.



## OpenAPI

````yaml /api-reference/openapi.json patch /v2/file_uploads/{id}/metadata
openapi: 3.1.0
info:
  title: Base39 API
  description: Base39 API
  version: 1.0.0
  contact:
    name: Base39 Team
    url: https://base39.com.br
    email: suporte@base39.com.br
  termsOfService: https://base39.com.br/termos
  license:
    name: Proprietary
    url: https://base39.com.br/termos
servers:
  - url: http://localhost:3000
    description: Local
  - url: https://api.dev.base39.cloud
    description: Development
  - url: https://api.base39.com.br
    description: Production
security:
  - OAuth2: []
tags:
  - name: pages
    description: Profiles and reports pages
  - name: pipelines
    description: Pipeline boards (kanban) of pages
  - name: blocks
    description: Blocks operations
  - name: search
    description: Search across content
  - name: targets
    description: Lookup targets via datasets
  - name: CognitoTriggers
    description: Cognito triggers
paths:
  /v2/file_uploads/{id}/metadata:
    patch:
      tags:
        - files
      summary: Set file metadata
      description: >-
        Update metadata for specific fields. Each field is updated independently
        to avoid concurrency conflicts.
      operationId: file_upload_set_metadata
      parameters:
        - name: id
          required: true
          in: path
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SetMetadataInput'
      responses:
        '200':
          description: Metadata updated successfully
        '404':
          description: File upload not found
components:
  schemas:
    SetMetadataInput:
      type: object
      properties:
        classification:
          type: object
          description: Classification result from classification subgraph
          example:
            document_type: balance_sheet
            confidence: 0.95
            description: Company balance sheet Q4 2024
            tags:
              - financial
              - quarterly
            entities:
              cnpj:
                - 12.345.678/0001-90
        structured:
          type: object
          description: >-
            Structured metadata blob (holds first-page preview metadata under
            `__preview`)
          example:
            __preview:
              page_01_object_key: uploads/o_x/fl_y/__preview/page_01.png
  securitySchemes:
    OAuth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://id.local.base39.cloud/oauth2/authorize
          tokenUrl: https://id.local.base39.cloud/oauth2/token
          scopes:
            profile: Read user profile
            email: Read user email
            openid: OpenID authentication
      description: OAuth2 Authorization Code flow

````