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

# Create an upload

> Mints presigned S3 POST credentials so a client can upload a large file directly (up to 500 MB). Returns a `fileRef` usable as a job source. Credentials expire in 300 seconds.



## OpenAPI

````yaml /openapi.json post /uploads
openapi: 3.1.0
info:
  title: Filecheck API
  version: 1.0.0
  description: >-
    The Filecheck REST API. Submit files as jobs, fetch results, and read your
    workflows, rules, connectors, profiles, and optimize presets. All requests
    are authenticated server-side with your secret key (`sk_live_…`).
servers:
  - url: https://api.filecheck.io
    description: Production
security:
  - bearerAuth: []
tags:
  - name: Jobs
    description: >-
      Submit files for preflight, fixing, optimization, validation, and
      previews.
  - name: Uploads
    description: Mint presigned credentials to upload large files directly.
  - name: Orders
    description: Attach jobs to commerce orders.
  - name: Workflows
  - name: Connectors
  - name: Rules
  - name: Profiles
  - name: OptimizePresets
paths:
  /uploads:
    post:
      tags:
        - Uploads
      summary: Create an upload
      description: >-
        Mints presigned S3 POST credentials so a client can upload a large file
        directly (up to 500 MB). Returns a `fileRef` usable as a job source.
        Credentials expire in 300 seconds.
      requestBody:
        required: false
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UploadRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UploadResponse'
        '400':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Missing or invalid key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: Failed to create upload credentials
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    UploadRequest:
      type: object
      additionalProperties: false
      properties:
        mimeType:
          type: string
          description: Content type of the file you intend to upload.
        sizeBytes:
          type: integer
          description: Expected size in bytes. Capped at 500 MB.
    UploadResponse:
      type: object
      properties:
        fileRef:
          type: string
          description: Pass this as a job source.
        upload:
          type: object
          properties:
            url:
              type: string
            fields:
              type: object
              additionalProperties:
                type: string
            method:
              type: string
              enum:
                - POST
        maxBytes:
          type: integer
        expiresIn:
          type: integer
          description: Seconds until the credentials expire.
    Error:
      type: object
      properties:
        error:
          type: boolean
        message:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        Your secret key as a bearer token, e.g. `Authorization: Bearer
        sk_live_…`. Secret keys are server-side only.

````