OpenSchemaExtract MCP Server

Model Context Protocol (MCP) server for OpenSchemaExtract. Enables AI assistants like Claude to extract structured data (JSON-LD, Microdata, RDFa) from any URL.

Installation

Quick Start (npx - no installation needed)

npx -y openschemaextract-mcp

Global Installation

npm install -g openschemaextract-mcp

Usage

With Claude Desktop

Add to your Claude Desktop configuration (~/Library/Application Support/Claude/claude_desktop_config.json on macOS or %APPDATA%\Claude\claude_desktop_config.json on Windows):

Without API Key (Public Demo - Rate Limited)

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

With API Key (Unlimited)

Get your API key from https://openschemaextract.chat-data.com/dashboard

{
  "mcpServers": {
    "openschemaextract": {
      "command": "npx",
      "args": ["-y", "openschemaextract-mcp"],
      "env": {
        "OPENSCHEMAEXTRACT_API_KEY": "osx_live_your_key_here"
      }
    }
  }
}

With Claude Code CLI

# Without API key (public demo)
claude mcp add --transport stdio openschemaextract -- npx -y openschemaextract-mcp

# With API key (unlimited)
claude mcp add --transport stdio \
  --env OPENSCHEMAEXTRACT_API_KEY=osx_live_your_key_here \
  openschemaextract -- npx -y openschemaextract-mcp

Or manually edit ~/.claude/settings.json:

{
  "mcpServers": {
    "openschemaextract": {
      "command": "npx",
      "args": ["-y", "openschemaextract-mcp"],
      "env": {
        "OPENSCHEMAEXTRACT_API_KEY": "osx_live_your_key_here"
      }
    }
  }
}

Available Tools

extract_schema

Extracts structured data from any URL.

Parameters:

• url (string, required): The URL to extract schema from

Returns:

• Schema types found (e.g., Recipe, Product, Article)
• Number of blocks by format (JSON-LD, Microdata, RDFa)
• Full structured data as JSON

Example prompts:

• "Extract schema from https://schema.org/Recipe"
• "What structured data is on stripe.com?"
• "Analyze the JSON-LD on this page: https://example.com"

Environment Variables

• OPENSCHEMAEXTRACT_API_KEY - Your API key (optional, for unlimited access)
• OPENSCHEMAEXTRACT_API_URL - Custom API endpoint (defaults to https://openschemaextract.chat-data.com/api/extract)

How It Works

The MCP server acts as a bridge between AI assistants and the OpenSchemaExtract API:

1. AI assistant calls the extract_schema tool with a URL
2. MCP server makes HTTP request to OpenSchemaExtract API
3. Returns formatted results to the AI assistant
4. AI summarizes and presents findings to the user

API Key Benefits

Without API key (public demo):

• ✓ Works immediately
• ✗ Rate limited
• ✗ May be slower

With API key:

• ✓ Unlimited requests
• ✓ Faster response times
• ✓ Priority support
• ✓ Access to dashboard analytics

Get your key at: https://openschemaextract.chat-data.com/dashboard

License

MIT - See LICENSE

Links

• OpenSchemaExtract Homepage
• GitHub Repository
• API Documentation
• Model Context Protocol Specification