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Create File Upload Part URLs

Create signed URLs for a bounded set of multipart upload part numbers.

POST/api/v2/files/uploads/{uploadId}/parts

Authorization

apiKey
X-API-Key<token>

Your Sim API key, personal or workspace-scoped. Generate one under Settings, then API Keys. Operations that reject workspace keys say so in their own description.

In: header

Path Parameters

uploadId*string

Upload session identifier.

Length1 <= length

Query Parameters

workspaceId*string

Workspace that owns the upload session.

Length1 <= length <= 128

Header Parameters

upload-token*string

Signed upload control token returned when the upload session was created.

Length1 <= length

Request Body

application/json

Multipart part numbers requiring signed URLs.

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X POST "https://www.sim.ai/api/v2/files/uploads/string/parts?workspaceId=string" \  -H "X-API-Key: YOUR_API_KEY" \  -H "upload-token: string" \  -H "Content-Type: application/json" \  -d '{    "partNumbers": [      1,      2    ]  }'
{
  "data": {
    "parts": [
      {
        "partNumber": 1,
        "url": "http://example.com",
        "headers": {
          "property1": "string",
          "property2": "string"
        },
        "expiresAt": "2019-08-24T14:15:22Z"
      }
    ]
  }
}
{
  "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid request"
  }
}
{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "API key required"
  }
}
{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient workspace permissions",
    "details": {
      "code": "INSUFFICIENT_WORKSPACE_ROLE"
    }
  }
}
{
  "error": {
    "code": "NOT_FOUND",
    "message": "Not found"
  }
}
{
  "error": {
    "code": "CONFLICT",
    "message": "File already exists"
  }
}
{
  "error": {
    "code": "PAYLOAD_TOO_LARGE",
    "message": "Request body is too large"
  }
}
{
  "error": {
    "code": "RATE_LIMITED",
    "message": "API rate limit exceeded",
    "details": {
      "retryAfter": "2026-01-01T00:00:30.000Z"
    }
  }
}
{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  }
}
{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service temporarily unavailable"
  }
}
POSTCreate File UploadDELETEDelete File