puppeteer_screenshot
Capture screenshots of web pages or specific elements using CSS selectors with configurable dimensions.
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 function for the puppeteer_screenshot tool. Sets the viewport size, takes a screenshot of either the full page or a specific CSS selector element, stores the screenshot in state, and returns both text 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. Defines parameters: name (required), selector (optional CSS selector), width (optional, default 800), height (optional, default 600).
{ 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/resources/handlers.ts:71-77 (helper)Helper function that sends a 'notifications/resources/list_changed' notification to the server when a new screenshot is taken.
// Helper function to notify about screenshot updates export function notifyScreenshotUpdate(server: Server) { server.notification({ method: "notifications/resources/list_changed", params: {}, }); }