MCP Browser Debugger

Instructions

Implementation Reference

• src/browserTools.ts:437-473 (handler)

  The handler function that implements the core logic of the 'get_page_info' tool. It evaluates various page properties like title, URL, dimensions, etc., in the browser context and returns them as JSON.

  export async function handleGetPageInfo(currentPage: Page): Promise<ToolResponse> {
    const info = await currentPage.evaluate((): PageInfo => {
      return {
        title: document.title,
        url: window.location.href,
        domain: window.location.hostname,
        path: window.location.pathname,
        protocol: window.location.protocol,
        referrer: document.referrer,
        characterSet: document.characterSet,
        contentType: document.contentType,
        readyState: document.readyState,
        lastModified: document.lastModified,
        viewport: {
          width: window.innerWidth,
          height: window.innerHeight,
        },
        screen: {
          width: window.screen.width,
          height: window.screen.height,
        },
        documentElement: {
          scrollHeight: document.documentElement.scrollHeight,
          scrollWidth: document.documentElement.scrollWidth,
        },
      };
    });
  
    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify(info, null, 2),
        },
      ],
    };
  }

• src/tools.ts:185-191 (schema)

  Schema definition for the 'get_page_info' tool, specifying no input parameters required.

    name: 'get_page_info',
    description: 'Obtém informações gerais sobre a página atual',
    inputSchema: {
      type: 'object',
      properties: {},
    },
  },

• src/index.ts:99-102 (registration)

  Dispatch registration in the main tool handler switch statement, which calls the get_page_info handler.

  case 'get_page_info': {
    const currentPage = await initBrowser();
    return await handleGetPageInfo(currentPage);
  }

• src/tools.ts:185-191 (registration)

  Tool object in the exported tools array used for MCP tool registration and listing.

    name: 'get_page_info',
    description: 'Obtém informações gerais sobre a página atual',
    inputSchema: {
      type: 'object',
      properties: {},
    },
  },