# Deepsleuth (pypi · security-scanner-deepsleuth-mcp)

Deterministic, no-LLM security scanner for MCP servers, plus an inline proxy gate.

- Trust score: 68/100 (medium)
- Change this week: +43
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- pypi · `security-scanner-deepsleuth-mcp`: 68/100 (this document), [markdown](https://verifymcp.io/servers/deepsleuth-deepsleuth/security-scanner-deepsleuth-mcp.md), [page](https://verifymcp.io/servers/deepsleuth-deepsleuth/security-scanner-deepsleuth-mcp)

## Channel facts

- Registry: `pypi`
- Package: `security-scanner-deepsleuth-mcp`
- Version: `1.0.4`
- 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 2026-10-18.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs setuptools.build_meta at install time, a recognised build step with no custom scripting around it.
  - No production dependencies, so there is no dependency health to assess.
- **Provenance & Transparency**: 48/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (Apache-2.0).
  - Actively maintained (last published 10 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 238 tokens (~79/item across 3 items; 3 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 20/100
  - Spec-recency check failed: implements MCP spec 2024-11-05; the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

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

Deepsleuth runs locally as a PyPI package, launched with uvx security-scanner-deepsleuth-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 deepsleuth-deepsleuth -- uvx security-scanner-deepsleuth-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "deepsleuth-deepsleuth": {
      "command": "uvx",
      "args": [
        "security-scanner-deepsleuth-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "deepsleuth-deepsleuth": {
      "command": "uvx",
      "args": [
        "security-scanner-deepsleuth-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add deepsleuth-deepsleuth -- uvx security-scanner-deepsleuth-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add deepsleuth-deepsleuth --command uvx --arg security-scanner-deepsleuth-mcp
```

### Hermes

```yaml
mcp_servers:
  deepsleuth-deepsleuth:
    command: "uvx"
    args: ["security-scanner-deepsleuth-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "deepsleuth-deepsleuth": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "security-scanner-deepsleuth-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add deepsleuth-deepsleuth -t stdio -c uvx -a security-scanner-deepsleuth-mcp
```

### Other

```json
{
  "mcpServers": {
    "deepsleuth-deepsleuth": {
      "command": "uvx",
      "args": [
        "security-scanner-deepsleuth-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.

### 2026-10-15 (score 68, +28)

- [security improvement] Injection markers: unverified → pass
- [security] First check of Judged manipulation: pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Tool coverage: unverified → 100
- [functional] First check of Schema quality: fail
- [functional] First check of Destructive annotations: pass
- [functional] First check of Schema quality: pass
- [functional] First check of Schema quality: good
- [functional] First check of Tool coverage: 100

### 2026-10-14 (score 40, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-10-13 (score 25, −15)

- [security regression] Malware scan: pass → unverified

### 2026-10-12 (score 40, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-10-08 (score 25)

First indexed and scored.

## MCP tools (3)

### `list_detectors` (~34 tokens)

List every detector in the deepsleuth registry: id, category, evidence location, phase, and required capability layers.

### `check_listing` (~97 tokens)

Analyze a supplied MCP tool listing with the listing-phase detectors (description/schema poisoning, shadowing, obfuscation, ...) WITHOUT launching the server. Pass another server's tools/list output.

Input parameters:

- `server_name` (string): Label for the supplied listing (default: 'supplied-listing').
- `tools_json` (string, required): A JSON array of tool entries ({name, description, inputSchema}), or an object with a 'tools' key.

### `scan_target` (~107 tokens)

Scan an MCP server target with the full detection core: source analysis, package manifests, and (optionally, dynamic=True) live execution inside the Docker sandbox. Returns the findings.

Input parameters:

- `dynamic` (boolean): Also run the dynamic layer (Docker sandbox required; the target always runs sandboxed). Default: false.
- `target` (string, required): Server directory, mcp.json path, or raw stdio launch command.
- `timeout` (integer): Per-call timeout seconds (default 30).

## Diagnostics

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

## Score history

- 2026-10-18: 68
- 2026-10-17: 68
- 2026-10-16: 68
- 2026-10-15: 68
- 2026-10-14: 40
- 2026-10-13: 25
- 2026-10-12: 40
- 2026-10-08: 25

## Common questions

### What is the Deepsleuth MCP server?

Deepsleuth is an MCP server listed in the public MCP registry as io.github.DeepSleuth/deepsleuth. Deterministic, no-LLM security scanner for MCP servers, plus an inline proxy gate. This page covers its PyPI package (security-scanner-deepsleuth-mcp).

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

Deepsleuth scores 68 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 18 October 2026. 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 Deepsleuth MCP server expose?

Deepsleuth exposes 3 tools: list_detectors, check_listing, scan_target. Their descriptions and schemas cost roughly 238 tokens of context every time the server is loaded.

### Is the Deepsleuth MCP server still maintained?

Deepsleuth is still listed as active in the MCP registry. We last reached this channel on 18 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 Deepsleuth MCP server under?

Deepsleuth declares the 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/security-scanner-deepsleuth-mcp/
- Socket report: https://socket.dev/pypi/package/security-scanner-deepsleuth-mcp
- Repository: https://github.com/DeepSleuth/deepsleuth-mcp
- Changelog RSS feed: https://verifymcp.io/servers/deepsleuth-deepsleuth/security-scanner-deepsleuth-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/deepsleuth-deepsleuth/security-scanner-deepsleuth-mcp.json
- HTML version of this page: https://verifymcp.io/servers/deepsleuth-deepsleuth/security-scanner-deepsleuth-mcp