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

# Upload File

> Upload a document file. Returns an aifano:// file reference for use in parse, extract, split, and edit calls.



## OpenAPI

````yaml api-reference/openapi.json post /upload
openapi: 3.1.0
info:
  title: Aifano Platform API
  version: 1.0.0
  description: >-
    Transform unstructured documents into structured data. Parse, extract,
    split, and edit documents at scale.
servers:
  - url: https://platform.aifano.com
    description: Production
security:
  - BearerAuth: []
paths:
  /upload:
    post:
      tags:
        - Files & Jobs
      summary: Upload File
      description: >-
        Upload a document file. Returns an aifano:// file reference for use in
        parse, extract, split, and edit calls.
      operationId: upload
      parameters:
        - name: extension
          in: query
          required: false
          schema:
            type: string
          description: Force a specific file extension (e.g. `.png`).
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                file:
                  type: string
                  format: binary
                  description: The document file to upload.
              required:
                - file
      responses:
        '200':
          description: File uploaded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UploadResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    UploadResponse:
      type: object
      required:
        - file_id
      properties:
        file_id:
          type: string
          description: File reference in `aifano://file_id` format.
        presigned_url:
          type: string
          nullable: true
          description: Presigned URL for direct access.
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Error message.
  responses:
    BadRequest:
      description: Bad request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Unauthorized - invalid or missing API key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: >-
        API key authentication. Use your Aifano API key (starts with `ak_live_`)
        as the Bearer token.

````