unmarking-mcp

Local MCP server that removes the C2PA content credential from AI-generated images, video and audio on your machine. It runs the same engine as unmark.ing, c2pa-rs compiled to WebAssembly, so files never leave your computer.

Setup

Claude Code:

claude mcp add unmarking -- npx -y unmarking-mcp

Any other client that supports stdio servers:

{
  "mcpServers": {
    "unmarking": { "command": "npx", "args": ["-y", "unmarking-mcp"] }
  }
}

Requires Node 20 or newer.

Tools

• inspect_file({ path | url }) reports the content credential embedded in a file, including whether it was made with Claude.
• strip_file({ path | url, output? }) removes it and writes the cleaned copy next to the original with a -clean suffix, or to output. Files without a credential are left alone.

Supported formats: JPG, PNG, WebP, GIF, SVG, TIFF, DNG, HEIC, AVIF, JXL, MP4, MOV, AVI, MP3, WAV, FLAC and M4A.

For files that are only reachable by URL there is also a hosted server at https://api.unmark.ing/mcp. See unmark.ing/developers.