Feature Request: Add upload_asset action to asset_tool

[paulodearaujo]

Summary

The asset_tool currently supports create_folder, get_all_assets_and_folders, and update_asset actions, but does not support uploading new assets.

The Webflow Data API has the POST /sites/{site_id}/assets endpoint (docs) which enables asset uploads, but this functionality is not exposed in the MCP server.

Use Case

When automating CMS workflows (e.g., creating landing pages with images programmatically), we need to:

1. Upload images (OG images, thumbnails) to Webflow
2. Reference the uploaded asset IDs in CMS collection items

Currently, there's no way to do step 1 via MCP, which breaks the automation workflow.

Proposed Solution

Add an upload_asset or create_asset action to the asset_tool that:

1. Calls POST /sites/{site_id}/assets to get uploadUrl and uploadDetails
2. Uploads the file to the S3 presigned URL
3. Returns the created asset ID

Possible API shape:

{
  "upload_asset": {
    "file_url": "https://example.com/image.webp",  // OR base64 content
    "file_name": "og-image.webp",
    "parent_folder_id": "optional-folder-id"
  }
}

Current Workaround

Manual upload via Webflow Designer, which defeats the purpose of automation.

Environment

• MCP Server version: latest
• Using with: Claude Code