Firecrawl MCP Server

Instructions

Implementation Reference

• src/index.ts:991-1070 (handler)

  Main execution logic for firecrawl_scrape: validates args, scrapes URL using Firecrawl client, formats output by requested formats, handles errors.
  case 'firecrawl_scrape': { if (!isScrapeOptions(args)) { throw new Error('Invalid arguments for firecrawl_scrape'); } const { url, ...options } = args; try { const scrapeStartTime = Date.now(); safeLog( 'info', `Starting scrape for URL: ${url} with options: ${JSON.stringify(options)}` ); const response = await client.scrapeUrl(url, { ...options, // @ts-expect-error Extended API options including origin origin: 'mcp-server', }); // Log performance metrics safeLog( 'info', `Scrape completed in ${Date.now() - scrapeStartTime}ms` ); if ('success' in response && !response.success) { throw new Error(response.error || 'Scraping failed'); } // Format content based on requested formats const contentParts = []; if (options.formats?.includes('markdown') && response.markdown) { contentParts.push(response.markdown); } if (options.formats?.includes('html') && response.html) { contentParts.push(response.html); } if (options.formats?.includes('rawHtml') && response.rawHtml) { contentParts.push(response.rawHtml); } if (options.formats?.includes('links') && response.links) { contentParts.push(response.links.join('\n')); } if (options.formats?.includes('screenshot') && response.screenshot) { contentParts.push(response.screenshot); } if (options.formats?.includes('extract') && response.extract) { contentParts.push(JSON.stringify(response.extract, null, 2)); } // If options.formats is empty, default to markdown if (!options.formats || options.formats.length === 0) { options.formats = ['markdown']; } // Add warning to response if present if (response.warning) { safeLog('warning', response.warning); } return { content: [ { type: 'text', text: trimResponseText( contentParts.join('\n\n') || 'No content available' ), }, ], isError: false, }; } catch (error) { const errorMessage = error instanceof Error ? error.message : String(error); return { content: [{ type: 'text', text: trimResponseText(errorMessage) }], isError: true, }; } }
• src/index.ts:23-178 (schema)

  Input schema definition for firecrawl_scrape tool, detailing parameters like url, formats, actions, extraction options.
  const SCRAPE_TOOL: Tool = { name: 'firecrawl_scrape', description: 'Scrape a single webpage with advanced options for content extraction. ' + 'Supports various formats including markdown, HTML, and screenshots. ' + 'Can execute custom actions like clicking or scrolling before scraping.', inputSchema: { type: 'object', properties: { url: { type: 'string', description: 'The URL to scrape', }, formats: { type: 'array', items: { type: 'string', enum: [ 'markdown', 'html', 'rawHtml', 'screenshot', 'links', 'screenshot@fullPage', 'extract', ], }, default: ['markdown'], description: "Content formats to extract (default: ['markdown'])", }, onlyMainContent: { type: 'boolean', description: 'Extract only the main content, filtering out navigation, footers, etc.', }, includeTags: { type: 'array', items: { type: 'string' }, description: 'HTML tags to specifically include in extraction', }, excludeTags: { type: 'array', items: { type: 'string' }, description: 'HTML tags to exclude from extraction', }, waitFor: { type: 'number', description: 'Time in milliseconds to wait for dynamic content to load', }, timeout: { type: 'number', description: 'Maximum time in milliseconds to wait for the page to load', }, actions: { type: 'array', items: { type: 'object', properties: { type: { type: 'string', enum: [ 'wait', 'click', 'screenshot', 'write', 'press', 'scroll', 'scrape', 'executeJavascript', ], description: 'Type of action to perform', }, selector: { type: 'string', description: 'CSS selector for the target element', }, milliseconds: { type: 'number', description: 'Time to wait in milliseconds (for wait action)', }, text: { type: 'string', description: 'Text to write (for write action)', }, key: { type: 'string', description: 'Key to press (for press action)', }, direction: { type: 'string', enum: ['up', 'down'], description: 'Scroll direction', }, script: { type: 'string', description: 'JavaScript code to execute', }, fullPage: { type: 'boolean', description: 'Take full page screenshot', }, }, required: ['type'], }, description: 'List of actions to perform before scraping', }, extract: { type: 'object', properties: { schema: { type: 'object', description: 'Schema for structured data extraction', }, systemPrompt: { type: 'string', description: 'System prompt for LLM extraction', }, prompt: { type: 'string', description: 'User prompt for LLM extraction', }, }, description: 'Configuration for structured data extraction', }, mobile: { type: 'boolean', description: 'Use mobile viewport', }, skipTlsVerification: { type: 'boolean', description: 'Skip TLS certificate verification', }, removeBase64Images: { type: 'boolean', description: 'Remove base64 encoded images from output', }, location: { type: 'object', properties: { country: { type: 'string', description: 'Country code for geolocation', }, languages: { type: 'array', items: { type: 'string' }, description: 'Language codes for content', }, }, description: 'Location settings for scraping', }, }, required: ['url'], }, };
• src/index.ts:960-973 (registration)

  Registers the firecrawl_scrape tool (as SCRAPE_TOOL) in the list of available tools for ListToolsRequest.
  server.setRequestHandler(ListToolsRequestSchema, async () => ({ tools: [ SCRAPE_TOOL, MAP_TOOL, CRAWL_TOOL, BATCH_SCRAPE_TOOL, CHECK_BATCH_STATUS_TOOL, CHECK_CRAWL_STATUS_TOOL, SEARCH_TOOL, EXTRACT_TOOL, DEEP_RESEARCH_TOOL, GENERATE_LLMSTXT_TOOL, ], }));
• src/index.ts:681-690 (helper)

  Type guard helper function to validate input arguments for the firecrawl_scrape handler.
  function isScrapeOptions( args: unknown ): args is ScrapeParams & { url: string } { return ( typeof args === 'object' && args !== null && 'url' in args && typeof (args as { url: unknown }).url === 'string' ); }