Gamma Watermark Remover — MCP Server

An MCP server that lets Claude Desktop, Claude Code, and any MCP client remove the "Made with Gamma" watermark from PDF and PowerPoint (.pptx) files exported from Gamma.app — right on your machine. Just ask:

"remove the gamma watermark from ~/Downloads/deck.pdf"

Removal is structural and lossless: the badge image and its gamma.app hyperlink are deleted as document objects. Nothing is re-rendered, nothing is uploaded.

Setup

Claude Desktop

Add to claude_desktop_config.json (Settings → Developer → Edit Config):

{
  "mcpServers": {
    "gamma-watermark-remover": {
      "command": "uvx",
      "args": ["gamma-watermark-remover-mcp"]
    }
  }
}

Claude Code

claude mcp add gamma-watermark-remover -- uvx gamma-watermark-remover-mcp

Any other MCP client

The server speaks stdio. Command: uvx gamma-watermark-remover-mcp (or pipx run gamma-watermark-remover-mcp, or pip install gamma-watermark-remover-mcp then gamma-watermark-remover-mcp).

Remote endpoint (no install at all)

A hosted streamable-HTTP endpoint is available at https://gammaremover.com/mcp for agents that can't run a local server. It accepts file content as base64 (≤30MB), processes in memory only — nothing is stored or logged. For maximum privacy prefer the local stdio server above or the in-browser tool.

Related MCP server: PDF MCP Flow

Tools

If the badge was flattened into the page image (rare), the result honestly says a watermark may remain instead of silently failing.

How it works

This server wraps the gamma-watermark-remover Python library:

• PDF (pypdf): drops link annotations targeting gamma.app/gamma.to and the draw op of the small bottom-right badge image (transformation-matrix tracked, size-guarded so backgrounds are never touched)

• PPTX (python-pptx): removes the gamma-hyperlinked shape from slide masters/layouts (where Gamma stores it) and slides

Related

• No-install web version (runs in your browser, no upload): gammaremover.com

• CLI + Python library: gammaremover/gamma-watermark-remover

• Agent skill (Claude Code / OpenClaw): gammaremover/gamma-watermark-remover-skill

Responsible use

Only process files you created or have the right to modify. Keep originals as backup and review cleaned files before sharing. Gamma's official watermark-free route is its paid plan.

License

MIT