mcpcheck · demo

@playwright/mcp degraded

npx -y @playwright/mcp@latest --headless

free preview run · last run 5 d ago (2026-09-02 17:57 UTC)

Clean install pass

1/1 hosts

Clients pass

Claude, Cursor, VS Code, Python SDK

OAuth n/a

n/a (stdio)

Tool catalog pass

24 tools

Error ergonomics warn

22/100

Protocol n/a

n/a

Clean install pass

Fresh npm/uv cache, start over stdio (or connect for remote URLs), initialize + tools/list, on GitHub-hosted Linux, macOS and Windows runners.

Host	Status	Node	Server	Tools	Time	Result
local macOS (local probe)	pass	v22.23.2	Playwright 1.63.0-alpha-2026-08-31	24	6.6 s	24 tools in 6.6 s

Client compatibility pass

ClaudeCursor inferredVS Code inferredPython SDK

Cursor and VS Code embed the official TypeScript SDK client; their chips are inferred from the TypeScript SDK rows (no GUI automation). Claude Code is verified with a claude mcp list health check — a real handshake over its own transport.

Client	local macOS
TypeScript SDK client (current) v1.30.0 embedded by Cursor, VS Code, Claude Desktop, Windsurf	pass 24 tools via ts-sdk 1.30.0
TypeScript SDK client (previous minor) v1.29.0 embedded by Cursor, VS Code	pass 24 tools via ts-sdk 1.29.0
Python SDK client (current) v2.1.1	pass 24 tools via mcp 2.1.1
Python SDK client (previous minor) v2.0.1	pass 24 tools via mcp 2.0.1
Claude Code (`claude mcp list`) v2.1.196 embedded by Claude Code	pass Claude Code 2.1.196 connected (24 tools in the catalog)

OAuth conformance n/a

Package specs run over stdio; there is no HTTP endpoint to authorize.

Tool catalog pass

24 tools · hash 9f7489d4fe8c3ec0 · captured 6 d ago · Playwright 1.63.0-alpha-2026-08-31

Tool	Description	Arguments
`browser_click`	Perform click on a web page	5 (1 required)
`browser_close`	Close the page	0
`browser_console_messages`	Returns all console messages	3 (1 required)
`browser_drag`	Perform drag and drop between two elements	4 (2 required)
`browser_drop`	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.	4 (1 required)
`browser_evaluate`	Evaluate JavaScript expression on page or element	4 (1 required)
`browser_file_upload`	Upload one or multiple files	1
`browser_fill_form`	Fill multiple form fields	1 (1 required)
`browser_find`	Search the accessibility snapshot of the current page for text or a regular expression. Returns matching snapshot nodes with a few lines of …	2
`browser_handle_dialog`	Handle a dialog	2 (1 required)
`browser_hover`	Hover over element on page	2 (1 required)
`browser_navigate`	Navigate to a URL	1 (1 required)
`browser_navigate_back`	Go back to the previous page in the history	0
`browser_network_request`	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_…	3 (1 required)
`browser_network_requests`	Returns a numbered list of network requests since loading the page. Use browser_network_request with the number to get full details.	3 (1 required)
`browser_press_key`	Press a key on the keyboard	1 (1 required)
`browser_resize`	Resize the browser window	2 (2 required)
`browser_run_code_unsafe`	Run a Playwright code snippet. Unsafe: executes arbitrary JavaScript in the Playwright server process and is RCE-equivalent.	2
`browser_select_option`	Select an option in a dropdown	3 (2 required)
`browser_snapshot`	Capture accessibility snapshot of the current page, this is better than screenshot	4
`browser_tabs`	List, create, close, or select a browser tab.	3 (1 required)
`browser_take_screenshot`	Take a screenshot of the current page. You can't perform actions based on the screenshot, use browser_snapshot for actions.	6 (1 required)
`browser_type`	Type text into editable element	5 (2 required)
`browser_wait_for`	Wait for text to appear or disappear or a specified time to pass	3

Error ergonomics warn 22/100

10 malformed inputs per tool (missing/mistyped/null/out-of-range/unknown fields …). Each error response is graded on code · cause · fix · retryable; 24 distinct error shapes graded by the judge ($0.0000), cached.

Tool	Score	Errors	Accepted	Cases
`browser_click`	25/100	10	0	10
`browser_close`	75/100	5	5	10
`browser_console_messages`	35/100	10	0	10
`browser_drag`	20/100	10	0	10
`browser_drop`	15/100	10	0	10
`browser_evaluate`	15/100	10	0	10
`browser_file_upload`	20/100	10	0	10
`browser_fill_form`	35/100	10	0	10
`browser_find`	5/100	10	0	10
`browser_handle_dialog`	25/100	10	0	10
`browser_hover`	10/100	10	0	10
`browser_navigate`	23/100	10	0	10
`browser_navigate_back`	38/100	10	0	10
`browser_network_request`	30/100	10	0	10
`browser_network_requests`	10/100	10	0	10
`browser_press_key`	23/100	10	0	10
`browser_resize`	40/100	10	0	10
`browser_run_code_unsafe`	5/100	10	0	10
`browser_select_option`	18/100	10	0	10
`browser_snapshot`	10/100	10	0	10
`browser_tabs`	35/100	10	0	10
`browser_take_screenshot`	25/100	10	0	10
`browser_type`	23/100	10	0	10
`browser_wait_for`	8/100	10	0	10

Weakest errors

Tool · case	Grade	Response
`browser_console_messages` required field `level` missing	✗ code · ✗ cause · ✗ fix · ✗ retryable llm	### Error Error: browserBackend.callTool: Target page, context or browser has been closed
`browser_handle_dialog` `promptText` is a 20000-character string	✗ code · ✗ cause · ✗ fix · ✗ retryable llm	### Error Error: browserBackend.callTool: Protocol error (Target.createTarget): Failed to open a new tab
`browser_evaluate` `target` is an empty string	✗ code · ✗ cause · ✗ fix · ✗ retryable llm	### Error Error: browserBackend.callTool: Target page, context or browser has been closed Browser logs: <launching> /Applications/Google Chrome.app/Contents/MacOS/Google Chrome --disable-field-trial-config --disable-background-networking --disable-background-timer-throttling --disable-backgrounding…
`browser_wait_for` `time` is negative	✗ code · ✗ cause · ✗ fix · ✗ retryable llm	### Error Error: No open pages available.
`browser_resize` `width` is negative	✗ code · ✓ cause · ✗ fix · ✗ retryable llm	### Error Error: browserBackend.callTool: viewportSize.height: expected integer, got float 1.5
`browser_resize` `height` is negative	✗ code · ✓ cause · ✗ fix · ✗ retryable llm	### Error Error: browserBackend.callTool: viewportSize.width: expected integer, got float 1.5
`browser_resize` empty arguments {}	✗ code · ✓ cause · ✗ fix · ✗ retryable heuristic	### Error Invalid arguments for tool "browser_resize": ✖ Invalid input: expected number, received undefined → at width ✖ Invalid input: expected number, received undefined → at height
`browser_console_messages` `all` has the wrong type ("yes")	✗ code · ✓ cause · ✗ fix · ✗ retryable heuristic	### Error Invalid arguments for tool "browser_console_messages": ✖ Invalid input: expected boolean, received string → at all

Protocol conformance n/a

Not applicable to stdio package specs.

Badge

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Machine-readable: report.json · trust.json