Cloudflare Playwright MCP

Overview

This project leverages Playwright for automated browser testing and integrates with Cloudflare Workers, Browser Rendering and @cloudflare/playwright for deployment.

Build and Deploy

Follow these steps to set up and deploy the project:

Install dependencies:

npm ci

Build:

cd cloudflare
npm run build

Deploy to Cloudflare Workers:

cd cloudflare/example
npm ci
npx wrangler deploy

Use with Cloudflare AI Playground

alt text

Cloudflare playground AI is a great way to test MCP servers using LLM models available in Workers AI.

Navigate to https://playground.ai.cloudflare.com/
Ensure model is set to llama-3.3-70b-instruct-fp8-fast
In MCP Servers, set URL to https://[my-mcp-url].workers.dev/sse
Click Connect
Status should update to Connected and it should list 14 available tools

You can now start to interact with the model, and it will run necessary tools to accomplish what was requested.

[!TIP] For best results, give simple instructions consisting of one single action, e. g., "Create a new todo entry", "Go to cloudflare site", "Take a screenshot"

Example of a conversation:

Role	Message
User	Go to demo.playwright.dev/todomvc
Assistant	runs browser_navigate tool The page has been navigated to https://demo.playwright.dev/todomvc/. The page title is "React • TodoMVC". The page snapshot shows the content of the page, including a heading, a textbox, and several links.
User	Create some todo entry
Assistant	runs browser_type tool A new todo entry "Buy groceries" has been created. The page snapshot shows the updated content of the page, including the new todo entry.
User	Nice. Now create a todo in parrot style
Assistant	runs browser_type tool A new todo entry "Polly wants a cracker" has been created in parrot style. The page snapshot shows the updated content of the page, including the new todo entry.
User	And create another todo in yoda style
Assistant	runs browser_type tool A new todo entry "A walk, I must take" has been created in Yoda style. The page snapshot shows the updated content of the page, including the new todo entry.
User	Take a screenshot
Assistant	runs browser_take_screenshot tool A screenshot of the current page has been taken. The screenshot is in PNG format and is 56KB in size.
User	Now click the checkbox of the parrot todo entry
Assistant	runs browser_clickt tool The checkbox of the parrot todo entry "Polly wants a cracker" has been clicked. The page snapshot shows the updated content of the page, with the checkbox now checked.
User	Take a screenshot
Assistant	runs browser_take_screenshot tool A screenshot of the current page has been taken. The screenshot is in PNG format and is 58KB in size.
User	Remove completed todo entries
Assistant	runs browser_clickt tool The "Clear completed" button has been clicked. The page snapshot shows the updated content of the page, with the completed todo entry "Polly wants a cracker" removed.
User	Take a final screenshot
Assistant	runs browser_take_screenshot tool A final screenshot of the current page has been taken. The screenshot is in PNG format and is 50KB in size.

Use with Claude Desktop

As of now, Claude Desktop only supports local MCP servers. To use playground-mcp with Claude Desktop we make use of mcp-remote, a tool that proxies remote MCP servers and exposes them locally. Use the following configuration:

Open the configuration file for Claude Desktop.
Add the following JSON snippet under the mcpServers section:

{
  "mcpServers": {
    "cloudflare-playwright-mcp": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://[my-mcp-url].workers.dev/sse"
      ]
    }
  }
}

Save the configuration file and restart Claude Desktop to apply the changes.

This setup ensures that Claude Desktop can communicate with the Cloudflare Playwright MCP server.

Here's an example of a session opening the TODO demo app, adding "buy lemons" and doing a screenshot, taking advantage of playwright-mcp tools and Browser Rendering:

alt text

Configure in VSCode

You can install the Playwright MCP server using the VS Code CLI:

# For VS Code
code --add-mcp '{"name":"cloudflare-playwright","type":"sse","url":"https://[my-mcp-url].workers.dev/sse"}'

# For VS Code Insiders
code-insiders --add-mcp '{"name":"cloudflare-playwright","type":"sse","url":"https://[my-mcp-url].workers.dev/sse"}'

After installation, the Playwright MCP server will be available for use with your GitHub Copilot agent in VS Code.

Use with Cursor

By default, when imageResponses is set to "auto", the server disables inline image responses for Cursor clients. To enable inline screenshots in Cursor, you need to override this behavior:

If you're running your own Cloudflare Worker, pass imageResponses: "allow" when creating the MCP agent:

export const PlaywrightMCP = createMcpAgent(env.BROWSER, {
  imageResponses: 'allow',
} as any);

Tool Modes

The tools are available in two modes:

Snapshot Mode (default): Uses accessibility snapshots for better performance and reliability
Vision Mode: Uses screenshots for visual-based interactions

Vision Mode works best with the computer use models that are able to interact with elements using X Y coordinate space, based on the provided screenshot.

Interactions

browser_snapshot
- Title: Page snapshot
- Description: Capture accessibility snapshot of the current page, this is better than screenshot
- Parameters: None
- Read-only: true

browser_click
- Title: Click
- Description: Perform click on a web page
- Parameters:
  - element (string): Human-readable element description used to obtain permission to interact with the element
  - ref (string): Exact target element reference from the page snapshot
  - doubleClick (boolean, optional): Whether to perform a double click instead of a single click
- Read-only: false

browser_drag
- Title: Drag mouse
- Description: Perform drag and drop between two elements
- Parameters:
  - startElement (string): Human-readable source element description used to obtain the permission to interact with the element
  - startRef (string): Exact source element reference from the page snapshot
  - endElement (string): Human-readable target element description used to obtain the permission to interact with the element
  - endRef (string): Exact target element reference from the page snapshot
- Read-only: false

browser_hover
- Title: Hover mouse
- Description: Hover over element on page
- Parameters:
  - element (string): Human-readable element description used to obtain permission to interact with the element
  - ref (string): Exact target element reference from the page snapshot
- Read-only: true

browser_type
- Title: Type text
- Description: Type text into editable element
- Parameters:
  - element (string): Human-readable element description used to obtain permission to interact with the element
  - ref (string): Exact target element reference from the page snapshot
  - text (string): Text to type into the element
  - submit (boolean, optional): Whether to submit entered text (press Enter after)
  - slowly (boolean, optional): Whether to type one character at a time. Useful for triggering key handlers in the page. By default entire text is filled in at once.
- Read-only: false

browser_select_option
- Title: Select option
- Description: Select an option in a dropdown
- Parameters:
  - element (string): Human-readable element description used to obtain permission to interact with the element
  - ref (string): Exact target element reference from the page snapshot
  - values (array): Array of values to select in the dropdown. This can be a single value or multiple values.
- Read-only: false

browser_press_key
- Title: Press a key
- Description: Press a key on the keyboard
- Parameters:
  - key (string): Name of the key to press or a character to generate, such as ArrowLeft or a
- Read-only: false

browser_wait_for
- Title: Wait for
- Description: Wait for text to appear or disappear or a specified time to pass
- Parameters:
  - time (number, optional): The time to wait in seconds
  - text (string, optional): The text to wait for
  - textGone (string, optional): The text to wait for to disappear
- Read-only: true

browser_file_upload
- Title: Upload files
- Description: Upload one or multiple files
- Parameters:
  - paths (array): The absolute paths to the files to upload. Can be a single file or multiple files.
- Read-only: false

browser_handle_dialog
- Title: Handle a dialog
- Description: Handle a dialog
- Parameters:
  - accept (boolean): Whether to accept the dialog.
  - promptText (string, optional): The text of the prompt in case of a prompt dialog.
- Read-only: false

Navigation

browser_navigate
- Title: Navigate to a URL
- Description: Navigate to a URL
- Parameters:
  - url (string): The URL to navigate to
- Read-only: false

browser_navigate_back
- Title: Go back
- Description: Go back to the previous page
- Parameters: None
- Read-only: true

browser_navigate_forward
- Title: Go forward
- Description: Go forward to the next page
- Parameters: None
- Read-only: true

Resources

browser_take_screenshot
- Title: Take a screenshot
- Description: Take a screenshot of the current page. You can't perform actions based on the screenshot, use browser_snapshot for actions.
- Parameters:
  - raw (boolean, optional): Whether to return without compression (in PNG format). Default is false, which returns a JPEG image.
  - filename (string, optional): File name to save the screenshot to. Defaults to page-{timestamp}.{png|jpeg} if not specified.
  - element (string, optional): Human-readable element description used to obtain permission to screenshot the element. If not provided, the screenshot will be taken of viewport. If element is provided, ref must be provided too.
  - ref (string, optional): Exact target element reference from the page snapshot. If not provided, the screenshot will be taken of viewport. If ref is provided, element must be provided too.
- Read-only: true

browser_pdf_save
- Title: Save as PDF
- Description: Save page as PDF
- Parameters:
  - filename (string, optional): File name to save the pdf to. Defaults to page-{timestamp}.pdf if not specified.
- Read-only: true

browser_network_requests
- Title: List network requests
- Description: Returns all network requests since loading the page
- Parameters: None
- Read-only: true

browser_console_messages
- Title: Get console messages
- Description: Returns all console messages
- Parameters: None
- Read-only: true

Utilities

browser_install
- Title: Install the browser specified in the config
- Description: Install the browser specified in the config. Call this if you get an error about the browser not being installed.
- Parameters: None
- Read-only: false

browser_close
- Title: Close browser
- Description: Close the page
- Parameters: None
- Read-only: true

browser_resize
- Title: Resize browser window
- Description: Resize the browser window
- Parameters:
  - width (number): Width of the browser window
  - height (number): Height of the browser window
- Read-only: true

Tabs

browser_tab_list
- Title: List tabs
- Description: List browser tabs
- Parameters: None
- Read-only: true

browser_tab_new
- Title: Open a new tab
- Description: Open a new tab
- Parameters:
  - url (string, optional): The URL to navigate to in the new tab. If not provided, the new tab will be blank.
- Read-only: true

browser_tab_select
- Title: Select a tab
- Description: Select a tab by index
- Parameters:
  - index (number): The index of the tab to select
- Read-only: true

browser_tab_close
- Title: Close a tab
- Description: Close a tab
- Parameters:
  - index (number, optional): The index of the tab to close. Closes current tab if not provided.
- Read-only: false

Testing

browser_generate_playwright_test
- Title: Generate a Playwright test
- Description: Generate a Playwright test for given scenario
- Parameters:
  - name (string): The name of the test
  - description (string): The description of the test
  - steps (array): The steps of the test
- Read-only: true

Vision mode

browser_screen_capture
- Title: Take a screenshot
- Description: Take a screenshot of the current page
- Parameters: None
- Read-only: true

browser_screen_move_mouse
- Title: Move mouse
- Description: Move mouse to a given position
- Parameters:
  - element (string): Human-readable element description used to obtain permission to interact with the element
  - x (number): X coordinate
  - y (number): Y coordinate
- Read-only: true

browser_screen_click
- Title: Click
- Description: Click left mouse button
- Parameters:
  - element (string): Human-readable element description used to obtain permission to interact with the element
  - x (number): X coordinate
  - y (number): Y coordinate
- Read-only: false

browser_screen_drag
- Title: Drag mouse
- Description: Drag left mouse button
- Parameters:
  - element (string): Human-readable element description used to obtain permission to interact with the element
  - startX (number): Start X coordinate
  - startY (number): Start Y coordinate
  - endX (number): End X coordinate
  - endY (number): End Y coordinate
- Read-only: false

browser_screen_type
- Title: Type text
- Description: Type text
- Parameters:
  - text (string): Text to type into the element
  - submit (boolean, optional): Whether to submit entered text (press Enter after)
- Read-only: false

browser_press_key
- Title: Press a key
- Description: Press a key on the keyboard
- Parameters:
  - key (string): Name of the key to press or a character to generate, such as ArrowLeft or a
- Read-only: false

browser_wait_for
- Title: Wait for
- Description: Wait for text to appear or disappear or a specified time to pass
- Parameters:
  - time (number, optional): The time to wait in seconds
  - text (string, optional): The text to wait for
  - textGone (string, optional): The text to wait for to disappear
- Read-only: true

browser_file_upload
- Title: Upload files
- Description: Upload one or multiple files
- Parameters:
  - paths (array): The absolute paths to the files to upload. Can be a single file or multiple files.
- Read-only: false

browser_handle_dialog
- Title: Handle a dialog
- Description: Handle a dialog
- Parameters:
  - accept (boolean): Whether to accept the dialog.
  - promptText (string, optional): The text of the prompt in case of a prompt dialog.
- Read-only: false