Tampermonkey MCP

First install the following browser extensions: Tampermonkey Tampermonkey Editors for Firefox or Chrome. It runs locally over stdio via the published package.

People connecting this server to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-07-13 · ★ 30 · #288 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25

TypeScript servers · how we verify → /methodology

01 · Install Tampermonkey MCP

Claude Code

claude mcp add tampermonkey-tampermonkey-mcp -- npx -y tampermonkey-mcp

Claude Desktop / Cursor / VS Code - add to config

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

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license no standard license detected - usage rights unclear; check the repo before commercial use

npm package tampermonkey-mcp - unscoped; check the name against the project README before installing

registry namespace io.github.Tampermonkey is GitHub-verified and matches the repo owner

03 · Who maintains Tampermonkey MCP

tampermonkey-mcp is maintained by tampermonkey. It's the only MCP server we track from this author; the repo dates to May 2026.

04 · Facts

repository: github.com/tampermonkey/tampermonkey-mcp
category: other - ranked #288 of 848 actively-maintained other servers as of 2026-08-25.
registry: io.github.Tampermonkey/tampermonkey-mcp (active, first published 2026-05-13)
packages: npm:tampermonkey-mcp

05 · Tampermonkey MCP FAQ

What is Tampermonkey MCP?

First install the following browser extensions: Tampermonkey Tampermonkey Editors for Firefox or Chrome. It runs locally over stdio via the published package.

Is Tampermonkey MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-07-13. We re-verify nightly.

How do I install Tampermonkey MCP?

Run `npx -y tampermonkey-mcp`. You can also paste the ready-made client config above.

Does Tampermonkey MCP run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

06 · Alternatives to Tampermonkey MCP

Alternatives to Tampermonkey MCP

Maintained other servers if Tampermonkey MCP isn't the fit.

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