网页截图服务

// Login pattern
{
  "type": "login",
  "email": { "selector": "#email", "value": "user@example.com" },
  "password": { "selector": "#password", "value": "secret" },
  "submit": "button[type=submit]",
  "successIndicator": ".dashboard"
}

// Search pattern  
{
  "type": "search",
  "input": "#search-box",
  "query": "MCP protocol",
  "resultsIndicator": ".search-results"
}

git clone https://github.com/chasesaurabh/mcp-page-capture.git
npm install

# Run without installing globally
npx mcp-page-capture

# Or add it to your toolchain
npm install -g mcp-page-capture
mcp-page-capture

npm install
npm run build
npm start

docker build -t mcp-page-capture .
docker run --rm -it mcp-page-capture

{
  "mcpServers": {
    "page-capture": {
      "command": "node",
      "args": ["dist/cli.js"]
    }
  }
}

import { startMcpPageCaptureServer } from "mcp-page-capture";

await startMcpPageCaptureServer();
// Optionally pass a custom Transport implementation if you don't want stdio.

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com"
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com",
    "steps": [
      { "type": "fill", "target": "#search", "value": "MCP protocol", "submit": true },
      { "type": "wait", "for": ".search-results" },
      { "type": "screenshot" }
    ]
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com/login",
    "steps": [
      { "type": "wait", "for": "#login-form" },
      { "type": "fill", "target": "#email", "value": "user@example.com" },
      { "type": "fill", "target": "#password", "value": "secretpassword" },
      { "type": "fill", "target": "#remember-me", "value": "true" },
      { "type": "click", "target": "button[type=submit]", "waitFor": ".dashboard" },
      { "type": "screenshot" }
    ]
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://docs.modelcontextprotocol.io",
    "steps": [
      { "type": "screenshot", "fullPage": true }
    ]
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com/dashboard",
    "headers": {
      "authorization": "Bearer dev-token"
    },
    "steps": [
      {
        "type": "cookie",
        "action": "set",
        "name": "session",
        "value": "abc123",
        "path": "/secure"
      },
      { "type": "screenshot" }
    ]
  }
}

{
  "tool": "extractDom",
  "params": {
    "url": "https://docs.modelcontextprotocol.io",
    "selector": "main article"
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com",
    "steps": [
      { "type": "viewport", "device": "ipad-pro" },
      { "type": "scroll", "to": "#main-content" },
      { "type": "screenshot" }
    ]
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com",
    "steps": [
      { "type": "fill", "target": "#email", "value": "test@example.com" },
      { "type": "click", "target": "button" }
    ],
    "validate": true
  }
}

{
  "content": [
    {
      "type": "text",
      "text": "mcp-page-capture screenshot\nURL: https://example.com\nCaptured: 2025-12-13T08:30:12.713Z\nFull page: false\nViewport: 1280x720\nDocument: 1280x2000\nScroll position: (0, 0)\nSize: 45.2 KB\nSteps executed: 5"
    },
    {
      "type": "image",
      "mimeType": "image/png",
      "data": "iVBORw0KGgoAAAANSUhEUgA..."
    }
  ]
}

## Supported options

### `captureScreenshot`
- `url` (string, required): Fully-qualified URL to capture
- `headers` (object, optional): Key/value map of HTTP headers to send with the initial page navigation
- `cookies` (array, optional): List of cookies to set before navigation. Each cookie supports `name`, `value`, and optional `url`, `domain`, `path`, `secure`, `httpOnly`, `sameSite`, and `expires` (Unix timestamp, seconds)
- `viewport` (object, optional): Viewport configuration
  - `preset` (string, optional): Use a predefined viewport preset (see Viewport Presets section)
  - `width` (number, optional): Custom viewport width
  - `height` (number, optional): Custom viewport height
  - `deviceScaleFactor` (number, optional): Device scale factor (e.g., 2 for Retina)
  - `isMobile` (boolean, optional): Whether to emulate mobile device
  - `hasTouch` (boolean, optional): Whether to enable touch events
  - `userAgent` (string, optional): Custom user agent string
- `retryPolicy` (object, optional): Retry configuration for transient failures
  - `maxRetries` (number, optional, default 3): Maximum number of retry attempts
  - `initialDelayMs` (number, optional, default 1000): Initial delay between retries
  - `maxDelayMs` (number, optional, default 10000): Maximum delay between retries
  - `backoffMultiplier` (number, optional, default 2): Exponential backoff multiplier
- `storageTarget` (string, optional): Storage backend name for saving captures

### `extractDom`
- `url` (string, required): Fully-qualified URL to inspect
- `selector` (string, optional): CSS selector to scope extraction to a specific element. Defaults to the entire document
- `headers` (object, optional): Key/value map of HTTP headers sent before navigation
- `cookies` (array, optional): Same cookie structure as `captureScreenshot`, applied before navigation
- `viewport` (object, optional): Same viewport configuration as `captureScreenshot`
- `retryPolicy` (object, optional): Same retry configuration as `captureScreenshot`
- `storageTarget` (string, optional): Storage backend name for saving DOM data

## Action Steps for captureScreenshot

The `captureScreenshot` tool supports a comprehensive `steps` array that allows you to perform various web interactions before capturing the screenshot. Each step is executed in sequence, allowing for complex automation scenarios.

### Fill Form (`fillForm`) - Recommended for Form Interactions
The `fillForm` step is the easiest and most LLM-friendly way to interact with forms. It auto-detects field types and handles multiple fields in a single step.

```json
{
  "type": "fillForm",
  "fields": [
    { "selector": "#email", "value": "user@example.com" },
    { "selector": "#password", "value": "secretpassword" },
    { "selector": "#country", "value": "us" },
    { "selector": "#newsletter", "value": "true" },
    { "selector": "#plan", "value": "premium", "type": "radio" }
  ],
  "formSelector": "#signup-form",
  "submit": true,
  "submitSelector": "#submit-btn",
  "waitForNavigation": true
}

{
  "type": "text",
  "selector": "#username",
  "value": "john.doe@example.com",
  "clearFirst": true,  // Clear existing text first (default: true)
  "delay": 100,  // Delay between keystrokes in ms (0-1000)
  "pressEnter": false  // Press Enter after typing (default: false)
}

{
  "type": "select",
  "selector": "#country",
  "value": "us"  // OR "text": "United States" OR "index": 0
}

{
  "type": "radio",
  "selector": "input[type='radio']",
  "value": "option1",  // Value attribute of the radio button
  "name": "preference"  // Name attribute to identify the radio group
}

{
  "type": "checkbox",
  "selector": "#agree-terms",
  "checked": true  // true to check, false to uncheck
}

{
  "type": "click",
  "target": "button.submit",
  "button": "left",  // "left", "right", or "middle" (default: left)
  "clickCount": 1,  // 1=single, 2=double, 3=triple (default: 1)
  "waitForNavigation": false,  // Wait for page navigation (default: false)
  "waitForSelector": ".modal-content"  // Wait for element to appear after click
}

{
  "type": "hover",
  "selector": ".dropdown-trigger",
  "duration": 1000  // How long to maintain hover in ms (0-10000)
}

{
  "type": "upload",
  "selector": "input[type='file']",
  "filePaths": ["/path/to/file1.pdf", "/path/to/file2.jpg"]
}

{
  "type": "submit",
  "selector": "#contact-form",  // Form element or submit button
  "waitForNavigation": true  // Wait for page navigation (default: true)
}

{
  "type": "scroll",
  "scrollTo": "#section-2",  // Scroll to element (takes precedence)
  "x": 0,  // OR horizontal scroll position in pixels
  "y": 500,  // OR vertical scroll position in pixels
  "behavior": "smooth"  // "auto" or "smooth" (default: auto)
}

{
  "type": "keypress",
  "key": "Enter",  // Key to press (e.g., "Enter", "Tab", "Escape", "ArrowDown")
  "modifiers": ["Control", "Shift"],  // Optional modifiers
  "selector": "#search-box"  // Optional element to focus first
}

{ "type": "wait", "for": ".loading-complete", "timeout": 10000 }

{ "type": "wait", "duration": 2000 }

{
  "type": "focus",
  "selector": "#search-input"
}

{
  "type": "blur",
  "selector": "#search-input"
}

{
  "type": "clear",
  "selector": "#search-input"
}

{
  "type": "evaluate",
  "script": "document.title = 'New Title'; return document.title;",
  "selector": "#element"  // Optional element to pass to the script
}

{
  "type": "screenshot",
  "fullPage": true,  // Capture entire page (optional)
  "captureElement": ".specific-element"  // Capture specific element (optional)
}

{
  "type": "cookie",
  "action": "set",
  "name": "session_id",
  "value": "abc123",
  "domain": ".example.com",
  "path": "/",
  "secure": true
}

{
  "type": "storage",
  "storageType": "localStorage",
  "action": "set",
  "key": "user_preferences",
  "value": "{\"theme\":\"dark\"}"
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com/signup",
    "steps": [
      { "type": "waitForSelector", "awaitElement": "#signup-form" },
      { "type": "text", "selector": "#email", "value": "user@example.com" },
      { "type": "text", "selector": "#password", "value": "SecurePass123!" },
      { "type": "select", "selector": "#country", "text": "United States" },
      { "type": "radio", "selector": "input[name='plan']", "value": "premium" },
      { "type": "checkbox", "selector": "#newsletter", "checked": true },
      { "type": "checkbox", "selector": "#terms", "checked": true },
      { "type": "hover", "selector": ".tooltip-trigger", "duration": 500 },
      { "type": "scroll", "y": 200 },
      { "type": "click", "target": "button[type='submit']", "waitForNavigation": true },
      { "type": "delay", "duration": 2000 },
      { "type": "screenshot", "fullPage": true }
    ]
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com",
    "viewport": {
      "preset": "iphone-14-pro"
    }
  }
}

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com",
    "retryPolicy": {
      "maxRetries": 5,
      "initialDelayMs": 2000,
      "backoffMultiplier": 1.5
    }
  }
}

import { getGlobalTelemetry } from "mcp-page-capture";

const telemetry = getGlobalTelemetry();

// Configure HTTP sink for centralized collection
telemetry.configureHttpSink({
  url: "https://telemetry.example.com/events",
  headers: { "X-API-Key": "your-api-key" },
  batchSize: 100,
  flushIntervalMs: 5000,
});

// Register custom hooks
telemetry.registerHook({
  name: "custom-logger",
  enabled: true,
  handler: async (event) => {
    console.log(`[${event.type}]`, event.data);
  },
});

import { registerStorageTarget, LocalStorageTarget } from "mcp-page-capture";

const localStorage = new LocalStorageTarget("/path/to/captures");
registerStorageTarget("local", localStorage);

import { registerStorageTarget, S3StorageTarget } from "mcp-page-capture";

const s3Storage = new S3StorageTarget({
  bucket: "my-captures",
  prefix: "screenshots/",
  region: "us-west-2",
});
registerStorageTarget("s3", s3Storage);

import { registerStorageTarget, MemoryStorageTarget } from "mcp-page-capture";

const memoryStorage = new MemoryStorageTarget();
registerStorageTarget("memory", memoryStorage);

{
  "tool": "captureScreenshot",
  "params": {
    "url": "https://example.com",
    "storageTarget": "s3"
  }
}