# SniffPup (remote · sniffpup.com)

Free passive outside security scan of a live web app: leaked keys, exposed files, open Supabase

- Trust score: 78/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `sniffpup.com`: 78/100 (this document), [markdown](https://verifymcp.io/servers/sniffpup-sniffpup/api-mcp.md), [page](https://verifymcp.io/servers/sniffpup-sniffpup/api-mcp)

## Channel facts

- Endpoint: `https://sniffpup.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, 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.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 78/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 216 tokens (~216/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **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 1 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 2 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 SniffPup MCP server?

SniffPup is a hosted endpoint at https://sniffpup.com/api/mcp, so there is nothing to install locally. 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 --transport http sniffpup-sniffpup 'https://sniffpup.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "sniffpup-sniffpup": {
      "url": "https://sniffpup.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "sniffpup-sniffpup": {
      "type": "http",
      "url": "https://sniffpup.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.sniffpup-sniffpup]
url = "https://sniffpup.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "sniffpup-sniffpup": {
      "type": "remote",
      "url": "https://sniffpup.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add sniffpup-sniffpup --url 'https://sniffpup.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  sniffpup-sniffpup:
    url: "https://sniffpup.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "sniffpup-sniffpup": {
      "Transport": "http",
      "Url": "https://sniffpup.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add sniffpup-sniffpup -t streamable-http -u 'https://sniffpup.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "sniffpup-sniffpup": {
      "type": "http",
      "url": "https://sniffpup.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## 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.

### 2026-11-04 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 77, +2)

- [security] The server rewrote its instructions, which are the text every model session reads
- [functional improvement] Schema quality: 307 → 216
- [functional] Schema quality: good → excellent

### 2026-11-02 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 74, +1)

- [security] Tool “scan_site” rewrote its description, which is the text the model reads
- [functional improvement] Schema quality: 363 → 307
- [cosmetic] “scan_site” reworded the description of “consent”

### 2026-10-29 (score 73, +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.

### 2026-10-28 (score 72, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-27 (score 72)

First indexed and scored.

## MCP tools (1)

### `scan_site` (~161 tokens)

Free scan of a site

Runs SniffPup's free passive scan of a live website (takes up to about a minute) and returns the score and the issues found. Every critical issue comes with masked evidence, fix steps and a fix prompt (with no critical issue, one other issue does). Only scan a site the user owns or has permission to test, and set consent to true only after the user confirms: I own this site or can test it, and agree to the Terms, including individual arbitration.

Input parameters:

- `consent` (boolean, required): true only if the user confirmed: I own this site or can test it, and agree to the Terms, including individual arbitration.
- `url` (string, required): The live site to scan, like https://your-app.com or your-app.com.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/sniffpup-sniffpup/api-mcp#diagnostics

## Score history

- 2026-11-05: 78
- 2026-11-04: 78
- 2026-11-03: 77
- 2026-11-02: 75
- 2026-11-01: 74
- 2026-10-31: 73
- 2026-10-30: 73
- 2026-10-29: 73
- 2026-10-28: 72
- 2026-10-27: 72

## Common questions

### What is the SniffPup MCP server?

SniffPup is an MCP server listed in the public MCP registry as io.github.sniffpup/sniffpup. Free passive outside security scan of a live web app: leaked keys, exposed files, open Supabase. This page covers its hosted endpoint (https://sniffpup.com/api/mcp).

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

SniffPup scores 78 out of 100 on VerifyMCP. 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 SniffPup MCP server expose?

SniffPup exposes 1 tool: scan_site. Their descriptions and schemas cost roughly 161 tokens of context every time the server is loaded.

### Does the SniffPup MCP server require authentication?

No. We connected to SniffPup without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the SniffPup MCP server still maintained?

SniffPup 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.

## Links

- Remote endpoint: https://sniffpup.com/api/mcp
- Website: https://sniffpup.com/docs/mcp
- Changelog RSS feed: https://verifymcp.io/servers/sniffpup-sniffpup/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/sniffpup-sniffpup/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/sniffpup-sniffpup/api-mcp