Tampermonkey MCP: MCP server, setup and security

What Tampermonkey MCP does

According to its repository: “MCP server to manage your Tampermonkey scripts”

An MCP server gives an AI agent extra tools it calls during the conversation: the agent reads their description, decides to use them and gets the result back. Tampermonkey MCP is listed under Other integrations, a category of 194 servers in the directory, where it ranks #117 by stars.

Installing and connecting Tampermonkey MCP

Distribution modes declared in the official MCP registry:

• npm package (Node.js, usually started with npx)

Like any MCP server, you declare it in your client's configuration (Claude Desktop, Claude Code, Cursor, VS Code, Codex…): a name, the command that starts it or its URL, and any environment variables. The client then starts it and lists its tools. Project language: TypeScript.

Security: what to check

An MCP server runs code with the rights you give it, and the model reads its tool descriptions: a malicious or compromised server can hijack the agent. Read the code, or pick a maintained and widely used server, before connecting it.

Points found for Tampermonkey MCP:

• No licence: without a licence the code is not legally reusable, even if it is public. Avoid it in a company setting without the author's agreement.

Good practice: grant only the rights needed (least privilege), require human approval for irreversible actions, and run the AI agent security check.

Project activity and maintenance

Created on May 12, 2026, the Tampermonkey/tampermonkey-mcp repository has 57 stars and 7 forks, with 1 open issues. It has more stars than 54% of the servers in the directory. It received changes this month. Version published in the registry: 0.0.4 (May 13, 2026).

Stars measure attention, not quality: a recent, heavily promoted project can collect them fast, while a useful but niche server will have few.