Upload Session Field Asset (v1)

Method + Path

POST /v1/workspace/:workspaceId/sessions/fields/:fieldId/assets

Actual backend path: /v1/workspace/:workspaceId/sessions/fields/:fieldId/assets

Description

Upload an asset file for a session custom field. Only supported for field types: image, file, or signature.

Authentication

Required - JWT token in Authorization header

Required Permissions:

• sessions.update

Headers

Header	Type	Required	Description
Authorization	string	Yes	Bearer token: Bearer <token>
Content-Type	string	Yes	multipart/form-data

Path Parameters

Parameter	Type	Required	Description
workspaceId	string	Yes	Workspace identifier
fieldId	string	Yes	Field identifier

Request Body

Form data with a file field named file.

Form Fields

Field	Type	Required	Description
file	file	Yes	File to upload (must match field type: image, file, or signature)

Response (201)

{
  "asset": {
    "fieldId": "507f1f77bcf86cd799439011",
    "fieldKey": "signature",
    "fileName": "signature.png",
    "url": "https://storage.example.com/assets/signature-123.png",
    "mediaType": "image/png",
    "sizeBytes": 45678
  }
}

Common Errors

• 400 Bad Request: Missing file, invalid field type (not image/file/signature), or field not found
• 401 Unauthorized: Missing or invalid authentication token
• 403 Forbidden: Insufficient permissions (requires sessions.update)
• 404 Not Found: Field or workspace not found
• 413 Payload Too Large: File size exceeds limit
• 415 Unsupported Media Type: Invalid file type
• 500 Internal Server Error: Server error