GUI Hub
For Claude, Cursor, VS Code & other MCP clients

Can Claude remove duplicates from a spreadsheet?

Not on its own. a chat AI can't run programs or write files on your computer. With the GUI Hub Data MCP server installed, Claude (Desktop or Code), Cursor, VS Code and other MCP clients can remove duplicate rows locally: the assistant calls the duckdb_dedupe tool, which runs DuckDB on your machine. Files are not uploaded.

Set it up (2 minutes)

  1. Claude Code / Cursor / VS Code / Windsurf: add the MCP server
    npx -y https://guihub.cc/mcp.tgz --product=data
    Claude Code: claude mcp add gui-hub-data -- npx -y https://guihub.cc/mcp.tgz --product=data
  2. Claude Desktop: download the one-file extension and double-click it.
  3. No AI? GUI Hub Data is also a point-and-click desktop app.

Then ask

“Remove duplicate rows from contacts.csv.”

What the AI gets

duckdb_dedupe — Write a copy of a local data file with exact duplicate rows removed (CSV, Excel, Parquet or JSON in; chosen format out).

InputType
input*string
formatstring (xlsx, HEADER true, csv, HEADER true, parquet, json, ARRAY true)
out*string

Cost

Free to install; each tool has 3 free uses. Then $9 once for all of GUI Hub Data (no subscription). The tool tells the assistant when free uses run out and how to unlock.

Powered by DuckDB (MIT), the official release, verified by SHA-256. GUI Hub is independent and not affiliated with DuckDB, Anthropic, Cursor or Microsoft.

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