FireCrawl MCP Server

A Model Context Protocol (MCP) server implementation that integrates with FireCrawl for advanced web scraping capabilities.

Features

• Web scraping with JavaScript rendering
• Efficient batch processing with built-in rate limiting
• URL discovery and crawling
• Web search with content extraction
• Automatic retries with exponential backoff
• Credit usage monitoring for cloud API
• Comprehensive logging system
• Support for cloud and self-hosted FireCrawl instances
• Mobile/Desktop viewport support
• Smart content filtering with tag inclusion/exclusion

Installation

Running with npx

npx -y firecrawl-mcp

Manual Installation

npm install -g firecrawl-mcp

Installing via Smithery

To install FireCrawl for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @mendableai/mcp-server-firecrawl --client claude

Running on Cursor

Configuring Cursor 🖥️ Note: Requires Cursor version 0.45.6+

To configure FireCrawl MCP in Cursor:

1. Open Cursor Settings
2. Go to Features > MCP Servers
3. Click "+ Add New MCP Server"
4. Enter the following:
   • Name: "firecrawl-mcp" (or your preferred name)
   • Type: "command"
   • Command: env FIRECRAWL_API_KEY=your-api-key npx -y firecrawl-mcp

Replace your-api-key with your FireCrawl API key.

After adding, refresh the MCP server list to see the new tools. The Composer Agent will automatically use FireCrawl MCP when appropriate, but you can explicitly request it by describing your web scraping needs. Access the Composer via Command+L (Mac), select "Agent" next to the submit button, and enter your query.

Configuration

Environment Variables

Required for Cloud API

• FIRECRAWL_API_KEY: Your FireCrawl API key
  • Required when using cloud API (default)
  • Optional when using self-hosted instance with FIRECRAWL_API_URL
• FIRECRAWL_API_URL (Optional): Custom API endpoint for self-hosted instances
  • Example: https://firecrawl.your-domain.com
  • If not provided, the cloud API will be used (requires API key)

Optional Configuration

Retry Configuration

• FIRECRAWL_RETRY_MAX_ATTEMPTS: Maximum number of retry attempts (default: 3)
• FIRECRAWL_RETRY_INITIAL_DELAY: Initial delay in milliseconds before first retry (default: 1000)
• FIRECRAWL_RETRY_MAX_DELAY: Maximum delay in milliseconds between retries (default: 10000)
• FIRECRAWL_RETRY_BACKOFF_FACTOR: Exponential backoff multiplier (default: 2)

Credit Usage Monitoring

• FIRECRAWL_CREDIT_WARNING_THRESHOLD: Credit usage warning threshold (default: 1000)
• FIRECRAWL_CREDIT_CRITICAL_THRESHOLD: Credit usage critical threshold (default: 100)

Configuration Examples

For cloud API usage with custom retry and credit monitoring:

# Required for cloud API
export FIRECRAWL_API_KEY=your-api-key

# Optional retry configuration
export FIRECRAWL_RETRY_MAX_ATTEMPTS=5        # Increase max retry attempts
export FIRECRAWL_RETRY_INITIAL_DELAY=2000    # Start with 2s delay
export FIRECRAWL_RETRY_MAX_DELAY=30000       # Maximum 30s delay
export FIRECRAWL_RETRY_BACKOFF_FACTOR=3      # More aggressive backoff

# Optional credit monitoring
export FIRECRAWL_CREDIT_WARNING_THRESHOLD=2000    # Warning at 2000 credits
export FIRECRAWL_CREDIT_CRITICAL_THRESHOLD=500    # Critical at 500 credits

For self-hosted instance:

# Required for self-hosted
export FIRECRAWL_API_URL=https://firecrawl.your-domain.com

# Optional authentication for self-hosted
export FIRECRAWL_API_KEY=your-api-key  # If your instance requires auth

# Custom retry configuration
export FIRECRAWL_RETRY_MAX_ATTEMPTS=10
export FIRECRAWL_RETRY_INITIAL_DELAY=500     # Start with faster retries

Usage with Claude Desktop

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "mcp-server-firecrawl": {
      "command": "npx",
      "args": ["-y", "mcp-server-firecrawl"],
      "env": {
        "FIRECRAWL_API_KEY": "YOUR_API_KEY_HERE",

        "FIRECRAWL_RETRY_MAX_ATTEMPTS": "5",
        "FIRECRAWL_RETRY_INITIAL_DELAY": "2000",
        "FIRECRAWL_RETRY_MAX_DELAY": "30000",
        "FIRECRAWL_RETRY_BACKOFF_FACTOR": "3",

        "FIRECRAWL_CREDIT_WARNING_THRESHOLD": "2000",
        "FIRECRAWL_CREDIT_CRITICAL_THRESHOLD": "500"
      }
    }
  }
}

System Configuration

The server includes several configurable parameters that can be set via environment variables. Here are the default values if not configured:

const CONFIG = {
  retry: {
    maxAttempts: 3, // Number of retry attempts for rate-limited requests
    initialDelay: 1000, // Initial delay before first retry (in milliseconds)
    maxDelay: 10000, // Maximum delay between retries (in milliseconds)
    backoffFactor: 2, // Multiplier for exponential backoff
  },
  credit: {
    warningThreshold: 1000, // Warn when credit usage reaches this level
    criticalThreshold: 100, // Critical alert when credit usage reaches this level
  },
};

These configurations control:

1. Retry Behavior

   • Automatically retries failed requests due to rate limits
   • Uses exponential backoff to avoid overwhelming the API
   • Example: With default settings, retries will be attempted at:
     • 1st retry: 1 second delay
     • 2nd retry: 2 seconds delay
     • 3rd retry: 4 seconds delay (capped at maxDelay)

2. Credit Usage Monitoring

   • Tracks API credit consumption for cloud API usage
   • Provides warnings at specified thresholds
   • Helps prevent unexpected service interruption
   • Example: With default settings:
     • Warning at 1000 credits remaining
     • Critical alert at 100 credits remaining

Rate Limiting and Batch Processing

The server utilizes FireCrawl's built-in rate limiting and batch processing capabilities:

• Automatic rate limit handling with exponential backoff
• Efficient parallel processing for batch operations
• Smart request queuing and throttling
• Automatic retries for transient errors

Available Tools

1. Scrape Tool (firecrawl_scrape)

Scrape content from a single URL with advanced options.

{
  "name": "firecrawl_scrape",
  "arguments": {
    "url": "https://example.com",
    "formats": ["markdown"],
    "onlyMainContent": true,
    "waitFor": 1000,
    "timeout": 30000,
    "mobile": false,
    "includeTags": ["article", "main"],
    "excludeTags": ["nav", "footer"],
    "skipTlsVerification": false
  }
}

2. Batch Scrape Tool (firecrawl_batch_scrape)

Scrape multiple URLs efficiently with built-in rate limiting and parallel processing.

{
  "name": "firecrawl_batch_scrape",
  "arguments": {
    "urls": ["https://example1.com", "https://example2.com"],
    "options": {
      "formats": ["markdown"],
      "onlyMainContent": true
    }
  }
}

Response includes operation ID for status checking:

{
  "content": [
    {
      "type": "text",
      "text": "Batch operation queued with ID: batch_1. Use firecrawl_check_batch_status to check progress."
    }
  ],
  "isError": false
}

3. Check Batch Status (firecrawl_check_batch_status)

Check the status of a batch operation.

{
  "name": "firecrawl_check_batch_status",
  "arguments": {
    "id": "batch_1"
  }
}

4. Search Tool (firecrawl_search)

Search the web and optionally extract content from search results.

{
  "name": "firecrawl_search",
  "arguments": {
    "query": "your search query",
    "limit": 5,
    "lang": "en",
    "country": "us",
    "scrapeOptions": {
      "formats": ["markdown"],
      "onlyMainContent": true
    }
  }
}

5. Crawl Tool (firecrawl_crawl)

Start an asynchronous crawl with advanced options.

{
  "name": "firecrawl_crawl",
  "arguments": {
    "url": "https://example.com",
    "maxDepth": 2,
    "limit": 100,
    "allowExternalLinks": false,
    "deduplicateSimilarURLs": true
  }
}

6. Extract Tool (firecrawl_extract)

Extract structured information from web pages using LLM capabilities. Supports both cloud AI and self-hosted LLM extraction.

{
  "name": "firecrawl_extract",
  "arguments": {
    "urls": ["https://example.com/page1", "https://example.com/page2"],
    "prompt": "Extract product information including name, price, and description",
    "systemPrompt": "You are a helpful assistant that extracts product information",
    "schema": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "price": { "type": "number" },
        "description": { "type": "string" }
      },
      "required": ["name", "price"]
    },
    "allowExternalLinks": false,
    "enableWebSearch": false,
    "includeSubdomains": false
  }
}

Example response:

{
  "content": [
    {
      "type": "text",
      "text": {
        "name": "Example Product",
        "price": 99.99,
        "description": "This is an example product description"
      }
    }
  ],
  "isError": false
}

Extract Tool Options:

• urls: Array of URLs to extract information from
• prompt: Custom prompt for the LLM extraction
• systemPrompt: System prompt to guide the LLM
• schema: JSON schema for structured data extraction
• allowExternalLinks: Allow extraction from external links
• enableWebSearch: Enable web search for additional context
• includeSubdomains: Include subdomains in extraction

When using a self-hosted instance, the extraction will use your configured LLM. For cloud API, it uses FireCrawl's managed LLM service.

Logging System

The server includes comprehensive logging:

• Operation status and progress
• Performance metrics
• Credit usage monitoring
• Rate limit tracking
• Error conditions

Example log messages:

[INFO] FireCrawl MCP Server initialized successfully
[INFO] Starting scrape for URL: https://example.com
[INFO] Batch operation queued with ID: batch_1
[WARNING] Credit usage has reached warning threshold
[ERROR] Rate limit exceeded, retrying in 2s...

Error Handling

The server provides robust error handling:

• Automatic retries for transient errors
• Rate limit handling with backoff
• Detailed error messages
• Credit usage warnings
• Network resilience

Example error response:

{
  "content": [
    {
      "type": "text",
      "text": "Error: Rate limit exceeded. Retrying in 2 seconds..."
    }
  ],
  "isError": true
}

Development

# Install dependencies
npm install

# Build
npm run build

# Run tests
npm test

Contributing

1. Fork the repository
2. Create your feature branch
3. Run tests: npm test
4. Submit a pull request

License

MIT License - see LICENSE file for details