Uploads a file directly via multipart form data or attaches an already uploaded signed blob to an account attachment record.
Upload Attachment
POST
/v1/attachments
Parameters
| Name | Type | Description |
|---|---|---|
file | file | Multipart file upload binary |
signed_blob_id | string | Signed blob ID from direct upload endpoint |
attachment_type | string | 'file', 'image', 'audio', 'video' |