MCP Browser Extension
NPM · MCP-BROWSER-EXTENSION
Drive your real Chrome over MCP: real logins and cookies, multi-tab automation, deny-all by default.
Available components
Last scanned (6 hours ago)
Scores higher than 92% of npm servers
Category Browser Automation
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 41 of 129 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to Mehmoodqureshi/mcp-browser-extension). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 0 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability67
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 2754 tokens (~125/item across 22 items; 22 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management70
- Stability observed for 21 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage89
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 68% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 22 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 23 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 +11
- Known CVEs: unverified → pass ▲ security
- Dependency health: unverified → 0.85 ▲ functional
- 4 Nov 26 −10
- Known CVEs: pass → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Stability: 0.63 → unverified ▼ security
- Capabilities: pass → unverified ▼ functional
- Dependency health: 0.87 → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- Package version: 0.9.36 → 0.9.38 functional
- 3 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Oct 26 +26
- Malware scan: unverified → pass ▲ security
- Known CVEs: unverified → pass ▲ security
- Dependency health: unverified → 0.87 ▲ functional
- 28 Oct 26 −25
- Malware scan: pass → unverified ▼ security
- Known CVEs: pass → unverified ▼ security
- Dependency health: 0.87 → unverified ▼ functional
- Package version: 0.9.34 → 0.9.36 functional
- 27 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.
- 25 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Analysed npm/mcp-browser-extension@0.9.38
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | Mehmoodqureshi/mcp-browser-extension |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/Mehmoodqureshi/mcp-browser-extension/.github/workflows/publish.yml@refs/tags/v0.9.38 |
| Rekor log index | 3689483612 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:5f9a39a258039931f9004a1e6f8bbebde8236f05943044bc1ab56b28197f7e8acfde9833310534cb26a8b1b471861242176fc7f19960285723b0d0be9 |
Background: How many MCP packages publish verified provenance →
Dependencies 129 packages
| Packages resolved | 129 |
|---|---|
| Stale | 41 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
auth_check ~182
Is the tab sitting on a sign-in wall? Reads the page (URL, title, password fields, sign-in controls) and returns { authRequired, confidence, signals }. Use it after a navigate, or whenever a step fails unexpectedly, to tell "the session expired" apart from "the agent got lost". Pass failOnAuthWall:true to get an [AUTH_REQUIRED] error instead of a verdict, so a harness can bucket the run as an auth failure.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| failOnAuthWall | boolean | – | Error with [AUTH_REQUIRED] if this lands on a sign-in wall (expired session) |
| frameId | number | – | Frame id from frames_list |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
batch ~223
Run multiple tool calls in one request — parallel (default) or serial. Each op is { tool, args } and goes through the same policy gate, rate limit, and error handling as a direct call. In parallel mode, tab-scoped ops MUST pass an explicit tabId (the active-tab default is unsafe under concurrency). Use to drive several tabs at once (e.g. open tabs, then batch get_text across them). Cannot be nested.
| Name | Type | Req | Description |
|---|---|---|---|
| maxConcurrency | number | – | Parallel mode: max ops in flight at once (default 6). |
| maxResultBytes | number | – | Total payload budget across all ops (default 1048576). Ops past the budget are replaced by a one-line summary instead of their content, so a 50-op screenshot/get_html batch cannot flood the caller. |
| mode | string | – | Default "parallel". |
| ops | array | yes | Operations to run; each is a tool name + its args. |
| stopOnError | boolean | – | Serial mode only: stop after the first failing op (the rest are skipped). |
No output schema declared.
No examples provided.
chrome_status ~29
Report backend/session status: paired browser profiles and how each was named, and flags for switched-off capabilities.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
extract_links ~120
Extract anchors from the page or a subtree. dedupe=true collapses links sharing an href (nav/footer noise); limit caps the count.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| dedupe | boolean | – | – |
| frameId | number | – | Frame id from frames_list |
| limit | number | – | – |
| sameOriginOnly | boolean | – | – |
| selector | string | – | – |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
frames_list ~88
List the tab's frames (the top document plus every iframe the extension can reach), with each frame's id and URL. Use it when a selector that should match does not: the element is probably in one of these frames, and you can then pass frameId (or allFrames:true) to act inside it.
| Name | Type | Req | Description |
|---|---|---|---|
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
get_cookies ~49
Cookies for the tab's URL (or url); values need --enable-cookie-values.
| Name | Type | Req | Description |
|---|---|---|---|
| tabId | string | – | Tab id (default: agent's tab) |
| url | string | – | – |
No output schema declared.
No examples provided.
get_html ~170
Get HTML of the page or an element. Output is capped (see maxBytes) and cut at a tag boundary; narrow it with `selector` rather than raising the cap when you can. Password field values are always blanked.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| frameId | number | – | Frame id from frames_list |
| maxBytes | number | – | Cap returned content at N UTF-8 bytes (default 262144); the full payload still lands in results/ |
| outer | boolean | – | – |
| ref | string | – | Element ref from a snapshot |
| selector | string | – | CSS selector (or pass ref) |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
get_text ~126
Get visible text of the page or an element.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| frameId | number | – | Frame id from frames_list |
| maxBytes | number | – | Cap returned content at N UTF-8 bytes (default 262144); the full payload still lands in results/ |
| ref | string | – | Element ref from a snapshot |
| selector | string | – | CSS selector (or pass ref) |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
page_watch ~87
Save a local page checkpoint and compare it later. Actions: create (name), compare (watchId), list, delete. Stores accessibility labels and state, never form values. Site allowlist still applies.
| Name | Type | Req | Description |
|---|---|---|---|
| action | string | yes | – |
| name | string | – | – |
| tabId | string | – | Tab id (default: agent's tab) |
| watchId | string | – | – |
No output schema declared.
No examples provided.
print_pdf ~149
Render the page to PDF through Chrome's own print pipeline and save it to the task's results/ dir. Returns the path and size, not the bytes - a PDF is not something to spend context on.
| Name | Type | Req | Description |
|---|---|---|---|
| landscape | boolean | – | – |
| pageRanges | string | – | e.g. '1-3, 5' |
| paperHeight | number | – | Inches |
| paperWidth | number | – | Inches |
| preferCSSPageSize | boolean | – | – |
| printBackground | boolean | – | Include background graphics (default true) |
| scale | number | – | 0.1 - 2.0 |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
profile_rename ~62
Rename an automatically named browser profile (e.g. "profile-2" -> "work"). The name sticks across restarts; its saved artifacts move with it.
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | yes | Current profile name |
| to | string | yes | New profile name |
No output schema declared.
No examples provided.
profile_use ~73
Switch the active browser profile (identity). Subsequent downloads, results, screenshots, and the action log are stored under profiles/<name>/. Resets the active task to "default" unless you then call task_new.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Profile name (becomes a folder; sanitized to a safe path segment). |
No output schema declared.
No examples provided.
proxy_status ~36
The active profile's proxy and the IP sites see. The user sets it per Chrome profile; for another IP, profile_use another profile.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
read_as_markdown ~111
Read the page (or subtree) as readable markdown.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| frameId | number | – | Frame id from frames_list |
| maxBytes | number | – | Cap returned content at N UTF-8 bytes (default 262144); the full payload still lands in results/ |
| selector | string | – | – |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
screenshot ~182
Capture a screenshot (page or element). Default is JPEG (quality 70) at CSS-pixel size, which is several times smaller than PNG and reads fine. Pass format:"png" for lossless, quality 1-100 for JPEG, scale 2 for device pixels on a Retina display or 0.5 to shrink.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| format | string | – | – |
| frameId | number | – | Frame id from frames_list |
| fullPage | boolean | – | – |
| quality | number | – | – |
| ref | string | – | Element ref from a snapshot |
| scale | number | – | – |
| selector | string | – | CSS selector (or pass ref) |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
snapshot ~183
Accessibility snapshot: interactive elements with refs to target by `ref` (more reliable than guessing CSS selectors). Pass diff:true to get only what changed since the last snapshot of this tab - far cheaper in a click/read loop. Password fields appear as secret:true with no value.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| diff | boolean | – | Return added/removed/changed elements since the previous snapshot of this tab instead of the whole tree |
| failOnAuthWall | boolean | – | Error with [AUTH_REQUIRED] if this lands on a sign-in wall (expired session) |
| frameId | number | – | Frame id from frames_list |
| interactiveOnly | boolean | – | – |
| max | number | – | – |
| tabId | string | – | Tab id (default: agent's tab) |
No output schema declared.
No examples provided.
storage ~70
Read/write localStorage (or sessionStorage). op: get|set|remove|clear.
| Name | Type | Req | Description |
|---|---|---|---|
| key | string | – | – |
| op | string | yes | – |
| session | boolean | – | – |
| tabId | string | – | Tab id (default: agent's tab) |
| value | string | – | – |
No output schema declared.
No examples provided.
tabs_list ~13
List open browser tabs.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
task_new ~70
Start a new task (run) under the active profile. Creates profiles/<profile>/tasks/<name>/ with downloads/, results/, screenshots/ and makes it the active task so all captured artifacts land there.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Task name (becomes a folder; sanitized to a safe path segment). |
No output schema declared.
No examples provided.
task_status ~25
Report the active profile/task and the folder paths where this run's artifacts are stored.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
tasks_list ~25
List every task across all profiles under the data dir, with sizes and download counts.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
wait_for ~129
Wait for a selector or text to appear/disappear.
| Name | Type | Req | Description |
|---|---|---|---|
| allFrames | boolean | – | Act on the first match in ANY frame (the element may be in an iframe) |
| failOnAuthWall | boolean | – | Error with [AUTH_REQUIRED] if this lands on a sign-in wall (expired session) |
| frameId | number | – | Frame id from frames_list |
| gone | boolean | – | – |
| selector | string | – | – |
| tabId | string | – | Tab id (default: agent's tab) |
| textContains | string | – | – |
| timeoutMs | number | – | – |
No output schema declared.
No examples provided.
How do I install the MCP Browser Extension server?
MCP Browser Extension runs locally as an npm package, launched with npx -y mcp-browser-extension. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · mcp-browser-extension
claude mcp add mehmoodqureshi-mcp-browser-extension -- npx -y mcp-browser-extension
What is the MCP Browser Extension server?
MCP Browser Extension is listed in the public MCP registry as io.github.Mehmoodqureshi/mcp-browser-extension. Drive your real Chrome over MCP: real logins and cookies, multi-tab automation, deny-all by default. This page covers its npm package (mcp-browser-extension).
Is the MCP Browser Extension server safe to use?
MCP Browser Extension scores 88 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the MCP Browser Extension server expose?
MCP Browser Extension exposes 22 tools: tabs_list, screenshot, get_text, get_html, snapshot, and 17 more. Their descriptions and schemas cost roughly 2,202 tokens of context every time the server is loaded.
Is the MCP Browser Extension server still maintained?
MCP Browser Extension is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the MCP Browser Extension server under?
MCP Browser Extension declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.