# nokk (pypi · nokk-mcp)

Headless browser for AI agents with Chrome's fingerprint that passes Cloudflare challenges.

- Trust score: 67/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- pypi · `nokk-mcp`: 67/100 (this document), [markdown](https://verifymcp.io/servers/koloss777-nokk/nokk-mcp.md), [page](https://verifymcp.io/servers/koloss777-nokk/nokk-mcp)

## Channel facts

- Registry: `pypi`
- Package: `nokk-mcp`
- Version: `0.1.46a1`
- 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 2026-11-05.

- **Supply Chain Security**: 50/100
  - Malware scan not yet available for this package.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs hatchling.build at install time, a recognised build step with no custom scripting around it.
  - 1 of 30 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to koloss777/nokk).
  - Clear OSI-approved license (MIT OR Apache-2.0).
  - Actively maintained (last published 6 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 64/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 461 tokens (~46/item across 10 items; 10 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 37/100
  - Stability observed for 11 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 71/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
  - Structured output schemas are declared (90% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 10 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the nokk MCP server?

nokk runs locally as a PyPI package, launched with uvx nokk-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add koloss777-nokk -- uvx nokk-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "koloss777-nokk": {
      "command": "uvx",
      "args": [
        "nokk-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "koloss777-nokk": {
      "command": "uvx",
      "args": [
        "nokk-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add koloss777-nokk -- uvx nokk-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "koloss777-nokk": {
      "type": "local",
      "command": [
        "uvx",
        "nokk-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add koloss777-nokk --command uvx --arg nokk-mcp
```

### Hermes

```yaml
mcp_servers:
  koloss777-nokk:
    command: "uvx"
    args: ["nokk-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "koloss777-nokk": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "nokk-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add koloss777-nokk -t stdio -c uvx -a nokk-mcp
```

### Other

```json
{
  "mcpServers": {
    "koloss777-nokk": {
      "command": "uvx",
      "args": [
        "nokk-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-11-05 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 66, −14)

- [security regression] Malware scan: pass → unverified

### 2026-11-01 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 79, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-10-30 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 63, −15)

- [security regression] Malware scan: pass → unverified

### 2026-10-27 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 77)

First indexed and scored.

## MCP tools (10)

### `open` (~92 tokens)

Navigate the stealth browser to ``url``. Returns the final ``{url, title}``.

A Cloudflare challenge on the way is solved before this returns (unless the
server runs with ``--no-auto-solve``); ``challenge`` then reports what was
met: ``kind``, ``solved``, and ``remaining`` (``"none"`` when through).

Input parameters:

- `url` (string, required)

Output parameters:

- `result` (object)

### `solve_challenge` (~75 tokens)

Solve the Cloudflare challenge the current page shows — the "Just a
moment…" interstitial or a Turnstile widget — pressing its checkbox if it
puts one up. Returns ``status``, ``solved``, ``remaining``, ``title``, ``url``.

Input parameters:

- `timeout_seconds` (number)

Output parameters:

- `result` (object)

### `challenge_state` (~87 tokens)

Which gate the current page shows: ``kind`` is ``"none"``,
\``"cloudflare-interstitial"``, ``"turnstile-widget"``, ``"aws-waf"``,
\``"recaptcha-widget"`` or ``"datadome"`` (recognised, not solvable);
\``solvable`` says whether ``solve_challenge`` can take it on.

Output parameters:

- `result` (object)

### `read_text` (~37 tokens)

Visible text of the current page, or of the first element matching the CSS
\``selector`` if given.

Input parameters:

- `selector` (string)

Output parameters:

- `result`

### `read_html` (~37 tokens)

Outer HTML of the current page, or of the first element matching the CSS
\``selector`` if given.

Input parameters:

- `selector` (string)

Output parameters:

- `result`

### `click` (~25 tokens)

Click the first element matching the CSS ``selector``.

Input parameters:

- `selector` (string, required)

Output parameters:

- `result` (boolean)

### `fill` (~37 tokens)

Set the value of the form field matching ``selector`` and fire input/change.

Input parameters:

- `selector` (string, required)
- `value` (string, required)

Output parameters:

- `result` (boolean)

### `evaluate` (~28 tokens)

Evaluate a JavaScript expression in the current page and return its value.

Input parameters:

- `expression` (string, required)

### `links` (~16 tokens)

All absolute hyperlink URLs on the current page.

Output parameters:

- `result` (array)

### `reset` (~27 tokens)

Discard the current browsing session (a fresh, coherent identity is used
for the next navigation).

Output parameters:

- `result` (string)

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/koloss777-nokk/nokk-mcp#diagnostics

## Score history

- 2026-11-05: 67
- 2026-11-04: 66
- 2026-11-03: 66
- 2026-11-02: 80
- 2026-11-01: 80
- 2026-10-31: 79
- 2026-10-30: 64
- 2026-10-29: 63
- 2026-10-28: 78
- 2026-10-27: 78
- 2026-10-26: 77
- 2026-10-25: 77

## Common questions

### What is the nokk MCP server?

nokk is an MCP server listed in the public MCP registry as io.github.koloss777/nokk. Headless browser for AI agents with Chrome's fingerprint that passes Cloudflare challenges. This page covers its PyPI package (nokk-mcp).

### Is the nokk MCP server safe to use?

nokk scores 67 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. 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 nokk MCP server expose?

nokk exposes 10 tools: open, solve_challenge, challenge_state, read_text, read_html, and 5 more. Their descriptions and schemas cost roughly 461 tokens of context every time the server is loaded.

### Is the nokk MCP server still maintained?

nokk 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 nokk MCP server under?

nokk declares the MIT OR Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- PyPI project: https://pypi.org/project/nokk-mcp/
- Socket report: https://socket.dev/pypi/package/nokk-mcp
- Repository: https://github.com/koloss777/nokk
- Changelog RSS feed: https://verifymcp.io/servers/koloss777-nokk/nokk-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/koloss777-nokk/nokk-mcp.json
- HTML version of this page: https://verifymcp.io/servers/koloss777-nokk/nokk-mcp