# io.github.Koala-Studios/newton-browser (npm · newton-browser)

Local-only Chrome and Edge control for MCP clients through an origin-scoped extension.

- Trust score: 59/100 (low)
- Change this week: −9
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `newton-browser`: 59/100 (this document), [markdown](https://verifymcp.io/servers/koala-studios-newton-browser/newton-browser.md), [page](https://verifymcp.io/servers/koala-studios-newton-browser/newton-browser)

## Channel facts

- Registry: `npm`
- Package: `newton-browser`
- Version: `0.4.1`
- Transport: `stdio`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 88/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 1 of 1 dependencies flagged as unhealthy (1 deprecated).
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 21 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 43/100
  - AI-judged instruction clarity (poor).
  - Tool/resource definitions use about 592 tokens (~53/item across 11 items; 11 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add koala-studios-newton-browser -- npx -y newton-browser
```

### Codex

```bash
codex mcp add koala-studios-newton-browser -- npx -y newton-browser
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "koala-studios-newton-browser": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "newton-browser"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add koala-studios-newton-browser --command npx --arg -y --arg newton-browser
```

### Hermes

```yaml
mcp_servers:
  koala-studios-newton-browser:
    command: "npx"
    args: ["-y", "newton-browser"]
```

### Other

```json
{
  "mcpServers": {
    "koala-studios-newton-browser": {
      "command": "npx",
      "args": [
        "-y",
        "newton-browser"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 59, +15)

- [security improvement] Malware scan: unverified → pass
- [functional regression] Dependency health: 1.00 → 0.00
- [functional improvement] Stability: unverified → 0.20

### 2026-08-01 (score 44, −6)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-31 (score 50, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 68, +21)

- [functional improvement] Tool coverage: unverified → 100
- [functional] First check of Tool coverage: 0
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: poor
- [functional] First check of Schema quality: pass

### 2026-07-26 (score 47)

First indexed and scored.

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

## MCP tools (11)

### `browser.status` (~30 tokens)

Report local host, extension, protocol, authentication mode, and limit readiness.

Input parameters:

- `transport` (string)

### `browser.session.start` (~72 tokens)

Start and attach an origin-scoped browser session.

Input parameters:

- `allowedOrigins` (array)
- `goal` (string)
- `incognito` (boolean)
- `instanceLabel` (string)
- `origin` (string, required)
- `tabMode` (string)
- `transport` (string)

### `browser.observe` (~70 tokens)

Observe the current session tab. mode:"text" returns bounded, redacted readable page text instead of the accessibility tree.

Input parameters:

- `maxChars` (number)
- `maxNodes` (number)
- `mode` (string)
- `sessionId` (string, required)
- `transport` (string)

### `browser.act` (~41 tokens)

Run one typed browser action and return its floor decision.

Input parameters:

- `action` (object, required)
- `sessionId` (string, required)
- `transport` (string)

### `browser.screenshot` (~96 tokens)

Capture and deliver a screenshot.

Input parameters:

- `delivery` (string)
- `device` (string)
- `filename` (string)
- `format` (string)
- `fullPage` (boolean)
- `outputDirectory` (string)
- `quality` (number)
- `region` (object)
- `sessionId` (string, required)
- `transport` (string)
- `waitMs` (number)

### `browser.console` (~84 tokens)

Read the session tab's buffered console output (read-only). Filter by level/pattern; clear:true empties the buffer. Headers and raw objects are never included.

Input parameters:

- `clear` (boolean)
- `level` (string)
- `limit` (number)
- `pattern` (string)
- `sessionId` (string, required)
- `transport` (string)

### `browser.network` (~83 tokens)

List the session tab's buffered network request metadata (read-only, no headers). Pass requestId to fetch one response body, returned only when its URL origin is within the session grant.

Input parameters:

- `limit` (number)
- `requestId` (string)
- `sessionId` (string, required)
- `transport` (string)
- `urlPattern` (string)

### `browser.tabs.list` (~23 tokens)

List this host's local sessions.

Input parameters:

- `transport` (string)

### `browser.tabs.finalize` (~43 tokens)

Close, retain, or hand off one session tab.

Input parameters:

- `disposition` (string, required)
- `sessionId` (string, required)
- `transport` (string)

### `browser.session.stop` (~29 tokens)

Stop one local session.

Input parameters:

- `sessionId` (string, required)
- `transport` (string)

### `browser.stop_all` (~21 tokens)

Stop all local sessions.

Input parameters:

- `transport` (string)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/koala-studios-newton-browser/newton-browser#diagnostics

## Score history

- 2026-08-03: 59
- 2026-08-02: 59
- 2026-08-01: 44
- 2026-07-31: 50
- 2026-07-29: 68
- 2026-07-28: 68
- 2026-07-27: 68
- 2026-07-26: 47

## Links

- npm package: https://www.npmjs.com/package/newton-browser
- Socket report: https://socket.dev/npm/package/newton-browser
- Repository: https://github.com/Koala-Studios/newton-browser
- Changelog RSS feed: https://verifymcp.io/servers/koala-studios-newton-browser/newton-browser/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/koala-studios-newton-browser/newton-browser/changelog.json
- HTML version of this page: https://verifymcp.io/servers/koala-studios-newton-browser/newton-browser