Labsco
plasmate-labs logo

Plasmate MCP

from plasmate-labs

Agent-native headless browser that converts web pages to structured Semantic Object Model (SOM) JSON -- 4x fewer tokens than raw HTML with lower latency on Claude and GPT-4o.

🔥🔥🔥🔥✓ VerifiedFreeNeeds API keys
#scraping#git

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.

Use with Claude Code

claude mcp add plasmate -- npx plasmate-mcp

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

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

Use with Claude Desktop

Add to claude_desktop_config.json:

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

Use with Cursor

Add to Cursor's MCP settings:

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

Available Tools

Once connected, your AI gets these tools:

ToolDescription
fetch_pageFetch a URL and get the Semantic Object Model (SOM)
extract_textGet clean readable text from any URL
open_pageOpen a persistent browser session
clickClick elements by SOM ID
evaluateExecute JavaScript in the page
close_pageClose 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