Web Content MCP Server

Instructions

Implementation Reference

• src/server.ts:353-411 (handler)

  Primary handler for executing the 'summarize_content' tool. Validates parameters, simulates content fetching and summarization, returns mock summary as text content.

    private async handleSummarizeContent(args: any) {
      // Validate arguments
      if (typeof args !== 'object' || args === null || typeof args.url !== 'string') {
        throw new McpError(ErrorCode.InvalidParams, 'Invalid arguments for summarize_content');
      }
  
      const { url, maxLength = 500 } = args;
  
      try {
        // In a real implementation, you would:
        // 1. Fetch the page content using Cloudflare Browser Rendering
        // 2. Process the content for LLM
        // 3. Call an LLM API to summarize the content
        
        // For this simulation, we'll return a mock summary
        const mockSummary = `
  # Browser Rendering API Summary
  
  Cloudflare Browser Rendering is a serverless headless browser service for Cloudflare Workers that enables:
  
  1. Rendering JavaScript-heavy websites
  2. Taking screenshots and generating PDFs
  3. Extracting structured data
  4. Automating browser interactions
  
  It offers two main interfaces:
  
  - **REST API**: Simple endpoints for common tasks
  - **Workers Binding API**: Advanced integration with Puppeteer
  
  The service runs within Cloudflare's network, providing low-latency access to browser capabilities without managing infrastructure.
        `.trim();
        
        // Truncate if necessary
        const truncatedSummary = mockSummary.length > maxLength
          ? mockSummary.substring(0, maxLength) + '...'
          : mockSummary;
        
        return {
          content: [
            {
              type: 'text',
              text: truncatedSummary,
            },
          ],
        };
      } catch (error) {
        console.error('Error summarizing content:', error);
        return {
          content: [
            {
              type: 'text',
              text: `Error summarizing content: ${error instanceof Error ? error.message : String(error)}`,
            },
          ],
          isError: true,
        };
      }
    }

• src/server.ts:119-136 (registration)

  Registration of the 'summarize_content' tool in the ListToolsRequestSchema handler, including name, description, and input schema definition.

  {
    name: 'summarize_content',
    description: 'Summarizes web content for more concise LLM context',
    inputSchema: {
      type: 'object',
      properties: {
        url: {
          type: 'string',
          description: 'URL to summarize',
        },
        maxLength: {
          type: 'number',
          description: 'Maximum length of the summary',
        },
      },
      required: ['url'],
    },
  },

• src/server.ts:122-135 (schema)

  Input schema definition for the 'summarize_content' tool, specifying required 'url' and optional 'maxLength' parameters.

  inputSchema: {
    type: 'object',
    properties: {
      url: {
        type: 'string',
        description: 'URL to summarize',
      },
      maxLength: {
        type: 'number',
        description: 'Maximum length of the summary',
      },
    },
    required: ['url'],
  },

• src/content-processor.ts:134-161 (helper)

  Helper method in ContentProcessor class for summarizing content. Provides identical mock summary logic, though not directly called by the tool handler.

    summarizeContent(content: string, maxLength: number = 500): string {
      // In a real implementation, you would call an LLM API here
      console.log('Simulating content summarization...');
      
      // For this simulation, we'll return a mock summary
      const mockSummary = `
  # Browser Rendering API Summary
  
  Cloudflare Browser Rendering is a serverless headless browser service for Cloudflare Workers that enables:
  
  1. Rendering JavaScript-heavy websites
  2. Taking screenshots and generating PDFs
  3. Extracting structured data
  4. Automating browser interactions
  
  It offers two main interfaces:
  
  - **REST API**: Simple endpoints for common tasks
  - **Workers Binding API**: Advanced integration with Puppeteer
  
  The service runs within Cloudflare's network, providing low-latency access to browser capabilities without managing infrastructure.
      `.trim();
      
      // Truncate if necessary
      return mockSummary.length > maxLength
        ? mockSummary.substring(0, maxLength) + '...'
        : mockSummary;
    }