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Server Configuration

Describes the environment variables required to run the server.

NameRequiredDescriptionDefault
PLAYWRIGHT_MCP_HEADLESSNoRun the browser in headless mode.true
PLAYWRIGHT_MCP_OUTPUT_DIRNoDirectory where upstream Playwright MCP writes artifacts..playwright-mcp
PLAYWRIGHT_MCP_OUTPUT_MODENoReturn snapshots, console logs, and network logs through stdout or files.stdout
PLAYWRIGHT_MCP_VIEWPORT_SIZENoBrowser viewport in WIDTHxHEIGHT format.
PLAYWRIGHT_MCP_BROWSER_ENGINENoBridge browser engine: cloak or playwright.cloak
PLAYWRIGHT_MCP_TIMEOUT_ACTIONNoDefault action timeout in milliseconds.5000
CLOAK_PLAYWRIGHT_MCP_HTTP_HOSTNoStreamable HTTP bind host.127.0.0.1
CLOAK_PLAYWRIGHT_MCP_HTTP_PORTNoStreamable HTTP bind port.3000
CLOAK_PLAYWRIGHT_MCP_TRANSPORTNoMCP transport exposed by the bridge: stdio or streamable-http.stdio
CLOAK_PLAYWRIGHT_MCP_EXTRA_ARGSNoComma-separated or JSON array of extra Chromium launch arguments.
CLOAK_PLAYWRIGHT_MCP_NO_SANDBOXNoAdds --no-sandbox and disables Chromium sandboxing.true
CLOAK_PLAYWRIGHT_MCP_STEALTH_ARGSNoAdds CloakBrowser default stealth launch arguments.true
PLAYWRIGHT_MCP_TIMEOUT_NAVIGATIONNoDefault navigation timeout in milliseconds.60000
CLOAK_PLAYWRIGHT_MCP_HTTP_ENDPOINTNoStreamable HTTP endpoint path./mcp
CLOAK_PLAYWRIGHT_MCP_HTTP_AUTH_TOKENNoOptional Bearer token for Streamable HTTP.
CLOAK_PLAYWRIGHT_MCP_CONSOLE_FALLBACKNoEnables the compatibility patch for console messages.true
CLOAK_PLAYWRIGHT_MCP_HTTP_SESSION_MAXNoMaximum active Streamable HTTP sessions in one process.32
CLOAK_PLAYWRIGHT_MCP_HTTP_SESSION_BACKENDNoSession metadata backend. Only memory is implemented in this release.memory
CLOAK_PLAYWRIGHT_MCP_HTTP_SESSION_IDLE_TTL_MSNoIdle TTL for Streamable HTTP sessions.3600000

Capabilities

Features and capabilities supported by this server

CapabilityDetails
tools
{}

Tools

Functions exposed to the LLM to take actions

NameDescription
browser_closeA

Close the page

browser_resizeA

Resize the browser window

browser_console_messagesC

Returns all console messages

browser_handle_dialogC

Handle a dialog

browser_evaluateB

Evaluate JavaScript expression on page or element

browser_file_uploadB

Upload one or multiple files

browser_dropA

Drop files or MIME-typed data onto an element, as if dragged from outside the page. At least one of "paths" or "data" must be provided.

browser_fill_formC

Fill multiple form fields

browser_press_keyB

Press a key on the keyboard

browser_typeB

Type text into editable element

browser_navigateC

Navigate to a URL

browser_navigate_backA

Go back to the previous page in the history

browser_network_requestsA

Returns a numbered list of network requests since loading the page. Use browser_network_request with the number to get full details.

browser_network_requestA

Returns full details (headers and body) of a single network request, or a single part if part is set. Use the number from browser_network_requests.

browser_run_code_unsafeA

Run a Playwright code snippet. Unsafe: executes arbitrary JavaScript in the Playwright server process and is RCE-equivalent.

browser_take_screenshotA

Take a screenshot of the current page. You can't perform actions based on the screenshot, use browser_snapshot for actions.

browser_snapshotB

Capture accessibility snapshot of the current page, this is better than screenshot

browser_clickC

Perform click on a web page

browser_dragB

Perform drag and drop between two elements

browser_hoverB

Hover over element on page

browser_select_optionC

Select an option in a dropdown

browser_tabsA

List, create, close, or select a browser tab.

browser_wait_forB

Wait for text to appear or disappear or a specified time to pass

cloakbrowser_binary_infoA

Return CloakBrowser package, cache, platform, and resolved browser binary information.

cloakbrowser_bridge_infoA

Return runtime metadata for the CloakBrowser bridge over upstream Playwright MCP.

Prompts

Interactive templates invoked by user choice

NameDescription

No prompts

Resources

Contextual data attached and managed by the client

NameDescription

No resources

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