Scalebrowser
NPM · @SCALEBROWSER/MCP · 2 COMPONENTS
Isolated browsers with a persistent identity for AI agents, on your own Windows machine.
Available components
Last scanned (7 hours ago)
Scores higher than 59% 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 Security100
- 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
- No production dependencies, so there is no dependency health to assess. View diagnostics → Pass
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 19 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability65
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 1434 tokens (~22/item across 65 items; 65 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management67
- Stability observed for 20 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "cookie_delete" implies "delete" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 66 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.
- 24 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.
- 16 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.
- 14 Oct 26 +5
- Stability: unverified → 0.33 ▲ functional
- 12 Oct 26 0
- Security disclosure: unverified → fail ▼ functional
- 11 Oct 26 0
- Security disclosure: fail → unverified ▼ functional
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 24 Oct 2026 · Analysed npm/@scalebrowser/mcp@0.2.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 0 packages
| Packages resolved | 0 |
|---|---|
| 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 →
artifact_list ~22
What this profile has produced: screenshots, downloads, PDFs, recordings.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
click ~25
Click an element, optionally a point inside it, for a picture rather than a control.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
clipboard ~17
Read or write the clipboard of the bound tab.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
cookie_delete ~19
Remove one cookie, or every cookie of one site.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
cookie_list ~19
The shape of the cookie jar. Never a value.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
credential_fill ~23
Sign in with this profile's stored login. The agent never receives it.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
credential_new ~24
Sign up: the daemon draws the password, stores it, and types it.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
credential_store ~19
Put a login the profile already has into the vault.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
credential.list ~22
Which platforms a profile can log into. Account names, never secrets.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
download_file ~19
Follow a download and keep the result as an artifact.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
extension.list ~18
The extension library, and what each profile loads.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
fill_form ~14
Several fields in one call.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
group.create ~12
Create a group.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
group.delete ~16
Delete a group. Its profiles stay.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
group.list ~15
The groups profiles are labelled with.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
inbox_open_link ~27
Open a link out of a message, by its number. The address is never shown.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
input.humanize ~24
Dispatch one humanized gesture at a coordinate, outside the page map.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
interact ~22
Hover, drag, upload a file, or choose from a native dropdown.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
interruption_list ~18
What the browser is currently asking, if anything.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
interruption_respond ~25
Answer what the browser itself is asking: a permission prompt, a device chooser.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
lease_fleet ~21
The same for several profiles at once, one handle each.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
lease_profile ~26
Reserve a free profile, start its browser, bind a tab, and return the handle.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
lease_renew ~20
Push the reservation's deadline out without losing the handle.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
measure_frames ~23
How a moving element behaves over time, for a slider or an animation.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
measure_gap ~22
The distance between two elements, for a puzzle piece and its slot.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
measure_rotation ~20
How far an image is turned, for a rotation challenge.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
navigate ~19
History and tabs, including the popup a click just opened.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
open_page ~25
Navigate to a public http or https address, and get the full page map back.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
page_report ~22
Console messages and a request summary. Never headers, cookies or bodies.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
passkey_list ~21
Which sites this profile can sign in to without a password.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
passkey_retire ~22
Stop this profile from offering one passkey, for good.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
preset.instantiate ~25
Make a fleet from a template: N profiles, each with its own identity.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
preset.list ~12
The stored templates.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
press_and_hold ~21
The whole press-and-hold gesture, in one call.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
press_key ~15
A key, including modifier chords.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
profile.batch ~25
Start, stop, delete, or reassign a proxy or extensions across many profiles.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
profile.create ~16
Create a profile with a fresh identity.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
profile.list ~18
The profiles on this daemon, with their state.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
profile.start ~23
Start a profile's browser. Does not give you one you can drive.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
profile.stop ~14
Stop a profile's browser.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
profile.update ~23
Change a profile's settings: name, proxy, group, geo mode.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
proxy.list ~15
The proxy pool. Never credentials.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
read_inbox ~21
The profile's confirmation codes, by mail or by text.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
read_text ~25
Read the page's prose verbatim, for an article or a thread of comments.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
read_value ~27
Read one thing from an element: text, an allowed attribute, a count, a table.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
record ~17
Start or stop recording what the browser is doing.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
release_profile ~22
End the reservation and stop the browser. Records how the work went.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
run_list ~24
This profile's earlier runs, so an agent can see what was already tried.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
save_pdf ~17
Save the current page as a PDF artifact.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
screenshot ~23
Capture the page or one element, for when the text map cannot describe it.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
How do I install the Scalebrowser MCP server?
Scalebrowser runs locally as an npm package, launched with npx -y @scalebrowser/mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @scalebrowser/mcp
claude mcp add net-scalebrowser-mcp -- npx -y @scalebrowser/mcp
What is the Scalebrowser MCP server?
Scalebrowser is an MCP server listed in the public MCP registry as net.scalebrowser/mcp. Isolated browsers with a persistent identity for AI agents, on your own Windows machine. This page covers its npm package (@scalebrowser/mcp).
Is the Scalebrowser MCP server safe to use?
Scalebrowser scores 77 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 24 October 2026. It declares no install or post-install scripts. 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 Scalebrowser MCP server expose?
Scalebrowser exposes 65 tools: lease_profile, lease_fleet, lease_renew, start_run, release_profile, and 60 more. Their descriptions and schemas cost roughly 1,333 tokens of context every time the server is loaded.
Is the Scalebrowser MCP server still maintained?
Scalebrowser is still listed as active in the MCP registry. We last reached this channel on 24 October 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 Scalebrowser MCP server under?
Scalebrowser declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.