plasmate

Overview

Plasmate compiles HTML into a structured Semantic Object Model (SOM) that is 10-800x smaller than raw HTML, making it ideal for AI agents to reason about web content efficiently. It features V8 JavaScript rendering, CDP compatibility, and supports both one-shot fetching and interactive browser sessions via MCP protocol. The tool provides 18 MCP methods including fetching pages, extracting text, interacting with elements, and managing browser sessions.

Try asking AI

After installing, here are 3 things you can ask your AI assistant:

• fetch_page

  Get structured SOM from any URL

  Try:Fetch the top stories from Hacker NewsTry:Extract the main content from example.com
• extract_text

  Get clean readable text from a page

  Try:Extract the main article text from the pageTry:Get all visible text content from a URL
• open_page

  Start an interactive session with a page

  Try:Open a new session for example.comTry:Start an interactive browsing session for news.ycombinator.com
• navigate_to

  Navigate to a URL within an active session

  Try:Navigate to the login pageTry:Go to the products section of the site
• click

  Click elements by SOM element ID

  Try:Click the submit buttonTry:Click the first link in the navigation
• type_text

  Type text into an input field

  Try:Type 'test' into the search fieldTry:Enter my email address in the signup form
• evaluate

  Run JavaScript in the page context

  Try:Get the current page titleTry:Extract all the links from the page
• extract_links

  Extract all links from a page

  Try:Get all the links on the pageTry:Find all external links in the article
• session_status

  Inspect active sessions and loaded URLs

  Try:Show me all active sessionsTry:Check the status of my current browsing session
• cache_status

  Inspect stateless MCP SOM cache reuse

  Try:Check cache statisticsTry:Show me how much cache reuse is happening
• scroll

  Scroll the page up or down

  Try:Scroll to the bottom of the pageTry:Scroll halfway down
• close_page

  End an active session

  Try:Close the current sessionTry:End the browsing session for example.com

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Installation

cargo install plasmate       # Rust
npm install -g plasmate      # Node.js
pip install plasmate         # Python

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

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