How do I install Demarker?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Demarker need an API key?

The publisher lists these environment variables: DEMARKER_API_KEY, DEMARKER_MCP_MAX_CREDITS.

What transport does Demarker use?

Demarker runs locally over stdio.

When was Demarker last checked?

Last checked 2026-11-08. Identify what an AI image carries (marks, metadata, watermarks), then clean it.

Demarker MCP server

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

npx -y @demarker/[email protected]

Credentials from the publisher

DEMARKER_API_KEY — Optional. Needed to clean images and read balance. Create one at https://demarker.io/app/settings/api
DEMARKER_MCP_MAX_CREDITS — Optional. Hard ceiling on credits one clean call may spend. Default 2.

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1DEMARKER_API_KEY=<secret> DEMARKER_MCP_MAX_CREDITS=<value> claude mcp add io.demarker-mcp -- npx -y @demarker/mcp@0.1.2

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.demarker-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "@demarker/[email protected]"8      ],9      "env": {10        "DEMARKER_API_KEY": "<secret>",11        "DEMARKER_MCP_MAX_CREDITS": "<value>"12      }13    }14  }15}

claude_desktop_config.json

Local · npmPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 0.1.2

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

Demarker agent tools

Open-source client, CLI, MCP server and agent skill for Demarker: see and remove what an AI generated image have hidden in them (visible marks, AI metadata, inferred hidden watermarks such as SynthID), then remove them!

Scanning is free and needs no account. Cleaning needs an API key and credits, and the person using it confirms a rights statement each time.

Package	What it is
`demarker`	CLI: `npx demarker identify image.png`
`@demarker/mcp`	MCP server for Claude, Cursor, VS Code and others
`@demarker/client`	Typed API client (no runtime dependencies)
`skills/demarker`	Agent skill: `npx skills add removeaiwatermark/demarker`

Quick start

npx demarker identify image.png                          # free, no key
export DEMARKER_API_KEY=sk_live_...                      # https://demarker.io/app/settings/api
npx demarker clean image.png --max-credits 1 --attest-rights

MCP, Claude Code: claude mcp add demarker -- npx -y @demarker/mcp. One-click Cursor and VS Code installs: https://demarker.io/developers

Safety by design

Spending is capped: --max-credits is required, and the MCP server also enforces a per-call ceiling (default 2 credits).
The rights attestation is never defaulted. The CLI asks, or needs an explicit --attest-rights; the MCP server asks the user through the client where supported.
Results never overwrite an existing file.

Development

pnpm install && pnpm build && pnpm test

This repository is published from Demarker's main codebase; issues and pull requests are welcome here. API reference: https://demarker.io/api/v1/openapi

MIT licensed.

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install Demarker?

Does Demarker need an API key?

What transport does Demarker use?

When was Demarker last checked?

Documentation

Demarker agent tools

Quick start

Safety by design

Development