SLIM MCP Server

Make Claude read the web in AI-native format

MCP (Model Context Protocol) server that allows Claude to fetch web content in SLIM format - optimized for AI comprehension with ~90% token reduction.

Quick Start

1. Install

npm install -g @slim-protocol/mcp-server
# or use npx directly (no install needed)

2. Configure Claude Desktop

Add to your claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "slim": {
      "command": "npx",
      "args": ["@slim-protocol/mcp-server"]
    }
  }
}

3. Restart Claude Desktop

That's it! Claude can now read web pages.

Usage

Just ask Claude to read any URL:

"Read this article and summarize it: https://example.com/article"

"What are the key points in this documentation: https://docs.example.com"

"Analyze this YouTube video: https://youtube.com/watch?v=..."

"What's the discussion about in this Reddit thread: https://reddit.com/r/..."

Claude will automatically use the SLIM tools to fetch and understand the content.

Tools

slim_fetch

Fetch web content in SLIM format.

Input:

• url (string, required): The URL to fetch

Example:

Claude uses slim_fetch with url="https://en.wikipedia.org/wiki/Artificial_intelligence"

slim_fetch_with_options

Fetch with advanced options.

Input:

• url (string, required): The URL to fetch
• includeImages (boolean, optional): Include image metadata (default: true)
• includeVideos (boolean, optional): Include video metadata (default: true)

Supported Content

| Platform | Content Type | |----------|-------------| | Websites | Articles, blogs, documentation | | YouTube | Video metadata + transcripts | | Reddit | Posts, comments, threads | | Bluesky | Posts, profiles | | Any URL | Generic web content |

What is SLIM?

SLIM (Slim Web Representation) is an AI-native content format with hierarchical levels:

• L1: Identity (title, type, author, date)
• L3: Structure (sections, headings, navigation)
• L5: Key Points (insights, topics, summary)
• L7: Full Content (complete text)

This structure allows Claude to understand content efficiently without processing raw HTML, CSS, and JavaScript.

Configuration

Environment Variables

| Variable | Default | Description | |----------|---------|-------------| | SWR_PROXY_URL | https://swrproxy.frux.pro | SLIM proxy URL | | SWR_TIMEOUT_MS | 30000 | Request timeout in ms | | DEBUG | false | Enable debug logging |

Custom Proxy

{
  "mcpServers": {
    "slim": {
      "command": "npx",
      "args": ["@slim-protocol/mcp-server"],
      "env": {
        "SWR_PROXY_URL": "https://my-proxy.example.com",
        "DEBUG": "true"
      }
    }
  }
}

Development

# Clone
git clone https://github.com/slim-protocol/mcp-server
cd mcp-server

# Install
npm install

# Run in dev mode
npm run dev

# Build
npm run build

# Test
npm test

Troubleshooting

"Tool not available"

1. Make sure Claude Desktop is restarted after config change
2. Check config file location and JSON syntax
3. Try running manually: npx @slim-protocol/mcp-server

"Request timed out"

Some pages are slow to load. Try:

1. Using a different URL
2. Increasing timeout via SWR_TIMEOUT_MS

"Proxy error"

1. Check internet connection
2. Verify proxy URL is correct
3. Try the URL in browser first

License

MIT

Links

• SLIM Protocol Documentation
• SWR Proxy
• MCP Specification