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

# Set or clear a file's expiry

> Set or clear a file's expiry. `ttl_seconds` is the only mutable field: a positive integer schedules the file to expire that many seconds from now; an explicit `null` clears a previously set expiry (files are permanent by default).

See the [Files guide](/build/multimodal/files).


## OpenAPI

````yaml patch /v3/files/{id}
openapi: 3.1.0
info:
  description: Schema-driven generative API that orchestrates LLM-powered workflows.
  title: Task API
  version: 3.0.0
servers:
  - description: Production
    url: https://api.opper.ai
  - description: Local development
    url: http://localhost:8080
security:
  - BearerAuth: []
tags:
  - description: Schema-driven function management and execution
    name: Functions
  - description: OpenAI-compatible chat completions
    name: Chat
  - description: OpenAI Responses API compatible endpoint
    name: Responses
  - description: Google-compatible interactions endpoint
    name: Interactions
  - description: Model registry and capabilities
    name: Models
  - description: Synchronous image generation
    name: Images
  - description: Text-to-speech and speech-to-text
    name: Audio
  - description: Asynchronous video generation
    name: Videos
  - description: Reusable file storage for media inputs and generated outputs
    name: Files
  - description: Async generation status and downloads
    name: Artifacts
  - description: OpenAI-compatible embeddings
    name: Embeddings
  - description: Recorded HTTP request/response generations
    name: Generations
  - description: System health and status
    name: System
  - description: Roundtable endpoint — fan out a query to multiple LLMs and combine results
    name: Roundtable
  - description: Web search, fetch, and other utility tools
    name: Tools
  - description: Caller identity, credits, and usage
    name: Account
paths:
  /v3/files/{id}:
    patch:
      tags:
        - Files
      summary: Update a file's expiry
      description: >-
        Set or clear a file's expiry. `ttl_seconds` is the only mutable field: a
        positive integer schedules the file to expire that many seconds from
        now; an explicit `null` clears a previously set expiry (files are
        permanent by default).
      operationId: updateFile
      parameters:
        - description: File ID (file_…)
          in: path
          name: id
          required: true
          schema:
            type: string
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateFileRequest'
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                properties:
                  bytes:
                    type: integer
                  created_at:
                    format: date-time
                    type: string
                  expires_at:
                    format: date-time
                    type: string
                  filename:
                    type: string
                  id:
                    description: file_… id
                    type: string
                  mime_type:
                    type: string
                  object:
                    example: file
                    type: string
                  purpose:
                    type: string
                  status:
                    type: string
                type: object
          description: Successful response
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
          description: Bad request
        '401':
          description: Unauthorized - missing or invalid API key
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
          description: Internal server error
components:
  schemas:
    UpdateFileRequest:
      properties:
        ttl_seconds:
          description: Positive integer (max 3153600000
          type: integer
      required:
        - ttl_seconds
      type: object
    ErrorResponse:
      properties:
        error:
          properties:
            code:
              type: string
            details:
              description: Any value
            message:
              type: string
          required:
            - code
            - message
          type: object
        meta:
          type: object
      required:
        - error
      type: object
  securitySchemes:
    BearerAuth:
      bearerFormat: API Key
      description: API key authentication. Pass your API key as a Bearer token.
      scheme: bearer
      type: http

````