Atlas / MCP servers / mattiasw / BrowserLoop

BrowserLoopSAFE

mcp/mattiasw/browserloop

A Model Context Protocol (MCP) server for taking screenshots and reading console logs of web pages using Playwright.

Verdict
SAFE
Grade
B
Trust score
87 /100
Exposed tools
2 2r · 0w · 0d
Transport
stdio
License
AGPL-3.0
Stars
23
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

[](https://github.com/mattiasw/browserloop/actions/workflows/ci.yml) [](https://www.npmjs.com/package/browserloop) [](https://www.npmjs.com/package/browserloop)

⚠️ ARCHIVED: This project is archived and will not receive any further updates. With the release of Chrome DevTools MCP, a dedicated MCP server for browser automation is no longer necessary as that project provides more comprehensive browser interaction capabilities including screenshots, console monitoring, and much more.

A Model Context Protocol (MCP) server for taking screenshots and reading console logs from web pages using Playwright. This tool allows AI agents to automatically capture screenshots and monitor browser console output for debugging, testing, and development tasks.

NOTE: Almost all of the code in this repository has been auto-generated. That means you should probably not trust it too much. That being said, it does work and I'm using it myself.

NOTE: If the documentation is incorrect, please let me know or send a PR. If you too want to use a code generation tool to update the code for this project, PROJECT_CONTEXT.md has been used as context to give a good overview of the various parts of the project. It might be a bit messy now but it's a good starting point and you're welcome to update it.

Features

  • 📸 High-quality screenshot capture using Playwright
  • 📝 Console log monitoring and collection from web pages
  • 🌐 Support for localhost and remote URLs
  • 🍪 Cookie-based authentication for protected pages
  • 🐳 Docker containerization for consistent environments
  • ⚡ PNG, JPEG, and WebP format support with configurable quality
  • 🛡️ Secure non-root container execution
  • 🤖 Full MCP protocol integra
Read from source at commit 077e27312da7OBSERVED · 2026-10-09
02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.

claude-code
claude mcp add browserloop -- npx -y [email protected]
claude-desktop
{
  "mcpServers": {
    "browserloop": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ]
    }
  }
}
03

Exposed tools (2)

2 read · 0 write · 0 destructive.

ToolRiskDescription
read_consoleread
screenshotread
04

Trust audit

SAFEgrade B · trust 87/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codeWARN
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
declared (2 observation(s))
Network
none-observed
Shell
none-observed
Dependencies
not all pinned
Secrets in source
found

Findings (8)

MEDIUMHard-coded secrets · secret.stripe · CWE-798, CWE-321
README.md:254
| **API Keys** | `sk_live_1234567890abcdef...` | `[API_KEY_MASKED]` |
LOWCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
tests/unit/cookie-security.test.ts:60
name: 'eval(',
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
src/package-info.ts:34
join(currentDir, '../../package.json'), // From dist/src/
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
tests/e2e/authentication-scenarios.test.ts:20
import { ScreenshotService } from '../../src/screenshot-service.js';
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
tests/e2e/authentication-scenarios.test.ts:26
} from '../../src/test-utils.js';
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
tests/e2e/authentication-scenarios.test.ts:27
import type { Cookie } from '../../src/types.js';
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
tests/e2e/element-screenshots.test.ts:24
import { ScreenshotService } from '../../src/screenshot-service.js';
LOWSupply chain · supply.unpinned · CWE-829, CWE-1357
package.json
@modelcontextprotocol/sdk, @types/sharp, playwright, sharp, zod, @biomejs/biome, @types/assert, @types/node
Why it matters. 11 dependency range(s) float
Fix. pin exact versions or ship a lockfile

Gates applied: no_behavioural_pass.

Audited 2026-10-09 · audit v0.4.1 · source sha 077e27312da7full audit observations/trust-audit/mcp-server/mattiasw__browserloop.json · Report an issue / request a re-scan
05

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-09077e27312da7SAFEB87first audit
06

Questions

What is the BrowserLoop MCP server?

A Model Context Protocol (MCP) server for taking screenshots and reading console logs of web pages using Playwright.

What tools does BrowserLoop expose?

2 in total: 2 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.

Is BrowserLoop safe to connect to an agent?

The audit found nothing in the source that contradicts what it says it does, and graded it B (87/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.

What credentials does BrowserLoop need?

No credential environment variables were found in its source, so it appears to need none.

How does BrowserLoop run?

It speaks stdio, so it runs as a local process your client starts. It is published on npm as browserloop at 1.1.1.

How current is this page?

The grade is for one exact copy of the source (077e27312da7), read on 2026-10-09. The repository is watched and re-audited when it changes.

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