# JAIL Search (npm · jail-mcp)

Search a billion+ documents — papers, books, code, legal cases, forums, Wikipedia, and more.

- Trust score: 59/100 (low)
- Change this week: +16
- Registry status: deprecated
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

> **Deprecated**: this server is marked deprecated in the MCP registry.

## Components

- remote · `api.jail.li`: 23/100, [markdown](https://verifymcp.io/servers/mefengl-jail-mcp/api.md), [page](https://verifymcp.io/servers/mefengl-jail-mcp/api)
- npm · `jail-mcp`: 59/100 (this document), [markdown](https://verifymcp.io/servers/mefengl-jail-mcp/jail-mcp.md), [page](https://verifymcp.io/servers/mefengl-jail-mcp/jail-mcp)
- pypi · `jail-mcp`: 20/100, [markdown](https://verifymcp.io/servers/mefengl-jail-mcp/jail-mcp-2.md), [page](https://verifymcp.io/servers/mefengl-jail-mcp/jail-mcp-2)

## Channel facts

- Registry: `npm`
- Package: `jail-mcp`
- Version: `1.4.0`
- 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**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
- **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 114 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 44/100
  - 0% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 430 tokens (~143/item across 3 items; 2 tools + 1 resources), over budget; trim descriptions and params.
  - 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.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); 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

### Claude

```bash
claude mcp add mefengl-jail-mcp -- npx -y jail-mcp
```

### Codex

```bash
codex mcp add mefengl-jail-mcp -- npx -y jail-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add mefengl-jail-mcp --command npx --arg -y --arg jail-mcp
```

### Hermes

```yaml
mcp_servers:
  mefengl-jail-mcp:
    command: "npx"
    args: ["-y", "jail-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "mefengl-jail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jail-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.

### 2026-08-02 (score 59, +40)

- [security regression] Provenance: unverified → fail
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] Security disclosure: fail → unverified
- [functional regression] Schema quality: 0 → unverified
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] License: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-07-31 (score 19, −6)

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

### 2026-07-30 (score 25, +1)

- [security regression] Malware scan: pass → unverified
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Schema quality: unverified → 0

### 2026-07-28 (score 24, −19)

- [functional regression] Schema quality: 0 → unverified
- [functional regression] Tool coverage: 100 → unverified

### 2026-07-27 (score 43)

First indexed and scored.

## MCP tools (2)

### `search` (~365 tokens)

Search documents. Returns ranked results with title, author, year, description, url, id, score — not full content. Use URLs from results with fetch/browsing to read actual documents.

Use when: user asks to research, find papers/books/articles, look up facts, find discussions, legal cases, or any "search for..." request.

Strategy: use 2-4 keywords per query (English preferred). Pick the right type first. Try synonyms if few results. Search across multiple types to cross-reference. Use detail() for full metadata on promising results.

Input parameters:

- `cursor` (string): Opaque pagination token. Use next_cursor from previous response.
- `limit` (integer): Results to return (1-50). Trial max 10, Pro max 50.
- `query` (string, required): Search query — use 2-4 keywords for best results. English preferred unless searching non-English content. Try different keywords and synonyms if first attempt returns few results.
- `type` (string, required): Content type (required). academic: OpenAlex/arXiv/Semantic Scholar/DBLP | wiki: Wikipedia 18 languages | books: books/digital libraries | legal: Case Law/CourtListener/EUR-Lex | forums: HN/StackExcha…

### `detail` (~59 tokens)

Get full metadata for a document. Use IDs from search results.

Input parameters:

- `doc_id` (string, required): Document ID from search results (e.g. "md5:abc123...", "hn:19415066", "doi:10.1038/...")

## Diagnostics

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

## Score history

- 2026-08-03: 59
- 2026-08-02: 59
- 2026-08-01: 19
- 2026-07-31: 19
- 2026-07-30: 25
- 2026-07-28: 24
- 2026-07-27: 43

## Links

- npm package: https://www.npmjs.com/package/jail-mcp
- Socket report: https://socket.dev/npm/package/jail-mcp
- Repository: https://github.com/mefengl/jail-mcp
- Website: https://jail.li/
- Changelog RSS feed: https://verifymcp.io/servers/mefengl-jail-mcp/jail-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/mefengl-jail-mcp/jail-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/mefengl-jail-mcp/jail-mcp