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plasmate-mcp

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MCP server for Plasmate. Use with Claude Code, Claude Desktop, Cursor, and Windsurf. npm install plasmate-mcp.

0 stars JavaScriptOthers Updated Aug 17, 2026
ai-agentsclaudecursorllmmcpmodel-context-protocolplasmatesomwindsurf

Documentation

plasmate-mcp

MCP server for Plasmate - the browser engine for AI agents.

Gives Claude Code, Claude Desktop, Cursor, Windsurf, and any MCP client the ability to browse the web through Plasmate instead of Chrome.

Install

bash
# Install the MCP wrapper
npm install -g plasmate-mcp

# Install the Plasmate engine (pick one)
pip install plasmate
# or: cargo install plasmate
# or: brew tap plasmate-labs/plasmate && brew install plasmate

Use with Claude Code

bash
claude mcp add plasmate -- npx plasmate-mcp

Or manually add to `~/.claude/settings.json`:

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

Use with Claude Desktop

Add to `claude_desktop_config.json`:

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

Use with Cursor

Add to Cursor's MCP settings:

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

This repo is also a Cursor plugin (`.cursor-plugin/plugin.json` + `mcp.json`). Test locally by copying it to `~/.cursor/plugins/local/plasmate`. Submit the public repo at cursor.com/marketplace/publish.

Available Tools

Once connected, your AI gets these tools:

ToolDescription
`fetch_page`Fetch a URL and get the Semantic Object Model (SOM)
`extract_text`Get clean readable text from any URL
`open_page`Open a persistent browser session
`click`Click elements by SOM ID
`evaluate`Execute JavaScript in the page
`close_page`Close a browser session

Why Plasmate instead of Chrome?

  • 16.6x fewer tokens - SOM is dramatically smaller than DOM dumps
  • 50x faster - No rendering engine overhead
  • 30MB memory - vs Chrome's 300MB+
  • Structured output - Clean JSON, not raw HTML

Links

Part of the Plasmate Ecosystem

Engineplasmate - The browser engine for agents
MCPplasmate-mcp - Claude Code, Cursor, Windsurf
Extensionplasmate-extension - Chrome cookie export
SDKsPython / Node.js / Go / Rust
FrameworksLangChain / CrewAI / AutoGen / Smolagents
ToolsScrapy / Audit / A11y / GitHub Action
ResourcesAwesome Plasmate / Notebooks / Benchmarks
Docsdocs.plasmate.app
W3CWeb Content Browser for AI Agents

Frequently asked questions

What is plasmate-mcp?

plasmate-mcp is MCP server for Plasmate. Use with Claude Code, Claude Desktop, Cursor, and Windsurf. npm install plasmate-mcp.

How do I install plasmate-mcp?

Open the GitHub repository and follow its README. Most MCP servers are added to your client's MCP config, then called by your agent.

Is plasmate-mcp open source?

Yes — it is hosted on GitHub at https://github.com/plasmate-labs/plasmate-mcp.

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