Browser MCP Server
Enables AI clients to directly control a real Chrome/Edge browser via a WebSocket extension, supporting operations like navigation, clicks, screenshots, and JavaScript evaluation.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
How we verified
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xiaoguangpan
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
navigateNavigate to a URL in the browser
snapshotGet page text content
clickClick an element by CSS selector
screenshotTake screenshot (returns base64 PNG)
evaluateExecute JavaScript in page MAIN world
tabsList open browser tabs
connectCheck if browser extension is connected
open_tabOpen a new browser tab with a URL
close_tabClose a browser tab by tabId
switch_tabSwitch to a specific tab (bring it to front)
typeType text into the focused element via CDP Input.insertText
fillFill an input/textarea by CSS selector, dispatching input/change events
press_keyPress a keyboard key (e.g. Enter, Escape, Tab, ArrowDown, Backspace)
wait_forPoll for a CSS selector to appear on the page (100ms interval, default 10s timeout)
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
ws: Memory exhaustion DoS from tiny fragments and data chunks
ws: Uninitialized memory disclosure
Tool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
14/14 tools missing one or more hints — navigate (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); snapshot (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); click (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +11 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tests exist
No test files found
Add tests that exercise each declared tool.
No eval / new Function
1 eval() or new Function() call — dynamic code execution
Replace eval / Function with explicit parsing or safer alternatives.
Production dependencies are patched
0 critical, 1 high severity in production deps — ws@8.18.0 (high), ws@8.18.0 (low)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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