# Citation Check (remote · exmachina-ai.fly.dev)

Does a cited URL exist, and does the source name what your claim names? Two answers.

- Trust score: 83/100 (high trust)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- remote · `exmachina-ai.fly.dev`: 83/100 (this document), [markdown](https://verifymcp.io/servers/secondstageturbine-citation-check/verify.md), [page](https://verifymcp.io/servers/secondstageturbine-citation-check/verify)

## Channel facts

- Endpoint: `https://exmachina-ai.fly.dev/verify`
- 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 2026-09-21.

- **Endpoint Security**: 74/100
  - 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.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - 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**: 70/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 434 tokens (~217/item across 2 items; 2 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 100/100
  - No destabilizing schema changes in the last 30 days.
- **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 2 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**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Citation Check MCP server?

Citation Check is a hosted endpoint at https://exmachina-ai.fly.dev/verify, 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 secondstageturbine-citation-check 'https://exmachina-ai.fly.dev/verify'
```

### Cursor

```json
{
  "mcpServers": {
    "secondstageturbine-citation-check": {
      "url": "https://exmachina-ai.fly.dev/verify"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "secondstageturbine-citation-check": {
      "type": "http",
      "url": "https://exmachina-ai.fly.dev/verify"
    }
  }
}
```

### Codex

```toml
[mcp_servers.secondstageturbine-citation-check]
url = "https://exmachina-ai.fly.dev/verify"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "secondstageturbine-citation-check": {
      "type": "remote",
      "url": "https://exmachina-ai.fly.dev/verify",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add secondstageturbine-citation-check --url 'https://exmachina-ai.fly.dev/verify' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  secondstageturbine-citation-check:
    url: "https://exmachina-ai.fly.dev/verify"
```

### Netclaw

```json
{
  "McpServers": {
    "secondstageturbine-citation-check": {
      "Transport": "http",
      "Url": "https://exmachina-ai.fly.dev/verify"
    }
  }
}
```

### Vellum

```bash
assistant mcp add secondstageturbine-citation-check -t streamable-http -u 'https://exmachina-ai.fly.dev/verify'
```

### Other

```json
{
  "mcpServers": {
    "secondstageturbine-citation-check": {
      "type": "http",
      "url": "https://exmachina-ai.fly.dev/verify"
    }
  }
}
```

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.

### 2026-09-13 (score 83, +1)

- [security] Stability: 0.97 → pass

### 2026-09-11 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-07 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-05 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-03 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-31 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-29 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (2)

### `check_citation` (~139 tokens)

Check whether a citation holds up

Fetch a URL and report whether it exists, and whether the source names the same entity as the claim you attach to it. These are two different questions and conflating them is the failure this exists to catch: a URL can return 200 and describe a different gene entirely. No account needed, nothing is stored about you.

Input parameters:

- `claim` (string): Optional. The text that cites it — the sentence or finding this URL is meant to support. Without it you only learn whether the URL exists, which is the weaker half.
- `url` (string, required): The citation to check. http(s) only; private and loopback addresses are refused.

### `verdict_meanings` (~33 tokens)

What the verdicts mean, and what they do not

The exact semantics of every status and relevance value, including what this checker cannot determine. Read once before trusting a verdict.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/secondstageturbine-citation-check/verify#diagnostics

## Score history

- 2026-09-21: 83
- 2026-09-20: 83
- 2026-09-19: 83
- 2026-09-18: 83
- 2026-09-17: 83
- 2026-09-16: 83
- 2026-09-15: 83
- 2026-09-14: 83
- 2026-09-13: 83
- 2026-09-12: 82
- 2026-09-11: 82
- 2026-09-10: 81
- 2026-09-09: 81
- 2026-09-08: 80
- 2026-09-07: 80
- 2026-09-06: 79
- 2026-09-05: 79
- 2026-09-04: 78
- 2026-09-03: 78
- 2026-09-02: 77
- 2026-09-01: 77
- 2026-08-31: 77
- 2026-08-30: 76
- 2026-08-29: 76
- 2026-08-28: 75
- 2026-08-27: 75
- 2026-08-26: 74
- 2026-08-25: 72
- 2026-08-24: 72
- 2026-08-23: 71

## Common questions

### What is the Citation Check MCP server?

Citation Check is an MCP server listed in the public MCP registry as io.github.SecondStageTurbine/citation-check. Does a cited URL exist, and does the source name what your claim names? Two answers. This page covers its hosted endpoint (https://exmachina-ai.fly.dev/verify).

### Is the Citation Check MCP server safe to use?

Citation Check scores 83 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 Citation Check MCP server expose?

Citation Check exposes 2 tools: check_citation, verdict_meanings. Their descriptions and schemas cost roughly 172 tokens of context every time the server is loaded.

### Does the Citation Check MCP server require authentication?

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

### Is the Citation Check MCP server still maintained?

Citation Check is still listed as active in the MCP registry. We last reached this channel on 21 September 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://exmachina-ai.fly.dev/verify
- Website: https://exmachina-ai.fly.dev/verify
- Changelog RSS feed: https://verifymcp.io/servers/secondstageturbine-citation-check/verify.xml
- Changelog JSON feed: https://verifymcp.io/servers/secondstageturbine-citation-check/verify.json
- HTML version of this page: https://verifymcp.io/servers/secondstageturbine-citation-check/verify