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

# get an upload URL

> A URL to PUT the file to, valid one hour. Then POST /uploads/confirm. Ceilings: images 20 MB, audio 500 MB, video 10 GB, documents 25 MB.



## OpenAPI

````yaml /openapi.json post /uploads
openapi: 3.1.0
info:
  title: Eversince API
  version: '1'
  description: >-
    Every Eversince tool as one POST call, plus the routes beside them: the tool
    list, account and keys, uploads, webhooks and models. The prose is at
    https://docs.eversince.ai.
servers:
  - url: https://eversince.ai/api/v1
security:
  - bearer: []
tags:
  - name: Discovery
    description: The tool list, the same on the MCP server, the REST API and the CLI.
  - name: Workspace
    description: Jobs, balances, settings, templates, skills and the overview.
  - name: Library
    description: >-
      Items, search, import, reading media, comments, boards, calendars, the
      brand kit and public links.
  - name: Timeline
    description: 'Video editing: timelines, clips, captions, sound, language and rendering.'
  - name: Canvas
    description: 'Still editing: canvases, slides, layers and rendering.'
  - name: Generation
    description: Image, video and audio generation, upscaling, cutouts and models.
  - name: Research
    description: 'What platforms publish: pulling and keeping posts.'
  - name: Account
    description: Balances, keys, workspaces and script sessions.
  - name: Uploads
    description: Files into the library by presigned upload or by URL.
  - name: Webhooks
    description: Job results posted to a URL as they complete.
  - name: Models
    description: Generation models and cost estimates.
paths:
  /uploads:
    post:
      tags:
        - Uploads
      summary: get an upload URL
      description: >-
        A URL to PUT the file to, valid one hour. Then POST /uploads/confirm.
        Ceilings: images 20 MB, audio 500 MB, video 10 GB, documents 25 MB.
      operationId: presign_upload
      parameters:
        - $ref: '#/components/parameters/WorkspaceId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                file_name:
                  type: string
                content_type:
                  type: string
                file_size:
                  type: number
                  description: Bytes.
                workspace_id:
                  type: string
              required:
                - file_name
                - content_type
                - file_size
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  upload_url:
                    type: string
                    description: PUT the bytes here with the same content type.
                  r2_key:
                    type: string
                    description: Passed back to confirm.
                  expires_in:
                    type: number
                    description: Seconds.
                required:
                  - upload_url
                  - r2_key
                  - expires_in
        '400':
          description: 'validation_error: the message names the field.'
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      status:
                        type: number
                    required:
                      - code
                      - message
                      - status
                required:
                  - error
        '401':
          description: 'unauthorized: the credential did not check out.'
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      status:
                        type: number
                    required:
                      - code
                      - message
                      - status
                required:
                  - error
        '429':
          description: 'rate_limited: Retry-After says when.'
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      status:
                        type: number
                    required:
                      - code
                      - message
                      - status
                required:
                  - error
        '503':
          description: 'unavailable: retry shortly.'
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      status:
                        type: number
                    required:
                      - code
                      - message
                      - status
                required:
                  - error
components:
  parameters:
    WorkspaceId:
      name: x-workspace-id
      in: header
      required: false
      schema:
        type: string
      description: The workspace this one call acts in, when it is not the key's own.
  securitySchemes:
    bearer:
      type: http
      scheme: bearer
      description: >-
        An API key (es_live_…) from Settings, under API keys, or an OAuth access
        token.

````