puppeteer_screenshot
Capture screenshots of web pages or specific elements using Puppeteer browser automation. Specify dimensions and CSS selectors to capture targeted content.
Instructions
Take a screenshot of the current page or a specific element
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | Name for the screenshot | |
| selector | No | CSS selector for element to screenshot | |
| width | No | Width in pixels (default: 800) | |
| height | No | Height in pixels (default: 600) |
Implementation Reference
- src/tools/handlers.ts:103-139 (handler)Handler logic for puppeteer_screenshot tool: sets viewport, captures screenshot of page or specified element as base64, stores in state, notifies update, returns text confirmation and image content.case "puppeteer_screenshot": { const width = args.width ?? 800; const height = args.height ?? 600; await page.setViewport({ width, height }); const screenshot = await (args.selector ? (await page.$(args.selector))?.screenshot({ encoding: "base64" }) : page.screenshot({ encoding: "base64", fullPage: false })); if (!screenshot) { return { content: [{ type: "text", text: args.selector ? `Element not found: ${args.selector}` : "Screenshot failed", }], isError: true, }; } state.screenshots.set(args.name, screenshot); notifyScreenshotUpdate(server); return { content: [ { type: "text", text: `Screenshot '${args.name}' taken at ${width}x${height}`, } as TextContent, { type: "image", data: screenshot, mimeType: "image/png", } as ImageContent, ], isError: false, }; }
- src/tools/definitions.ts:34-47 (schema)Input schema definition for the puppeteer_screenshot tool, specifying required 'name' and optional 'selector', 'width', 'height' parameters.{ name: "puppeteer_screenshot", description: "Take a screenshot of the current page or a specific element", inputSchema: { type: "object", properties: { name: { type: "string", description: "Name for the screenshot" }, selector: { type: "string", description: "CSS selector for element to screenshot" }, width: { type: "number", description: "Width in pixels (default: 800)" }, height: { type: "number", description: "Height in pixels (default: 600)" }, }, required: ["name"], }, },
- src/server.ts:35-41 (registration)MCP server request handlers registration: ListToolsRequestSchema returns the TOOLS array containing puppeteer_screenshot schema; CallToolRequestSchema dispatches to handleToolCall based on tool name.server.setRequestHandler(ListToolsRequestSchema, async () => ({ tools: TOOLS, })); server.setRequestHandler(CallToolRequestSchema, async (request) => handleToolCall(request.params.name, request.params.arguments ?? {}, state, server) );