# CitedBy (remote · citedby.eu)

Check a page, AI-crawler access, llms.txt and backlinks of a site. Free, read-only.

- Trust score: 74/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-25

## Components

- remote · `citedby.eu`: 74/100 (this document), [markdown](https://verifymcp.io/servers/eu-citedby-citedby/citedby.md), [page](https://verifymcp.io/servers/eu-citedby-citedby/citedby)

## Channel facts

- Endpoint: `https://citedby.eu/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 2026-10-25.

- **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).
  - Tool/resource definitions use about 470 tokens (~117/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 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 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

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

CitedBy is a hosted endpoint at https://citedby.eu/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 eu-citedby-citedby 'https://citedby.eu/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "eu-citedby-citedby": {
      "url": "https://citedby.eu/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "eu-citedby-citedby": {
      "type": "http",
      "url": "https://citedby.eu/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.eu-citedby-citedby]
url = "https://citedby.eu/mcp"
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add eu-citedby-citedby --url 'https://citedby.eu/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  eu-citedby-citedby:
    url: "https://citedby.eu/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "eu-citedby-citedby": {
      "Transport": "http",
      "Url": "https://citedby.eu/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add eu-citedby-citedby -t streamable-http -u 'https://citedby.eu/mcp'
```

### Other

```json
{
  "mcpServers": {
    "eu-citedby-citedby": {
      "type": "http",
      "url": "https://citedby.eu/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.

### 2026-10-25 (score 74, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-24 (score 74)

First indexed and scored.

## MCP tools (4)

### `check_page` (~97 tokens)

Check one page for AI-search and SEO problems

Fetch one public web page as CitedBot (robots.txt respected) and return what is wrong with it for AI answers and search: title, description, headings, structured data, canonical, language, links and more. Each finding has why it matters and the exact fix. Deterministic checks only; says so when the page cannot be fetched.

Input parameters:

- `url` (string, required): Full page address, for example https://example.com/pricing

### `check_ai_crawler_access` (~99 tokens)

Which AI crawlers can read this site

Read a site's robots.txt and test the server for GPTBot, OAI-SearchBot, ChatGPT-User, PerplexityBot, ClaudeBot, Google-Extended, Bingbot and Googlebot. Returns, per crawler, whether robots.txt allows it and whether the server answers it, so you can see who is blocked and by what.

Input parameters:

- `site` (string, required): Domain or address of the site, for example example.com

### `check_llms_txt` (~74 tokens)

Check a site's llms.txt

Fetch /llms.txt of a site and report whether it exists, whether its links work, and whether /llms-full.txt exists. When there is none, the full report holds a draft built from the site's own pages.

Input parameters:

- `site` (string, required): Domain or address of the site, for example example.com

### `backlinks` (~84 tokens)

Referring domains of a domain (open data)

How many other domains link to a domain, and the strongest referrers, from the Common Crawl domain web graph. Covers domains with 100 or more referring domains under .eu, EU and UK country domains, plus the 5,000 most-linked sites; says plainly when a domain is not in the data.

Input parameters:

- `domain` (string, required): Domain, for example example.com

## Diagnostics

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

## Score history

- 2026-10-25: 74
- 2026-10-24: 74

## Common questions

### What is the CitedBy MCP server?

CitedBy is an MCP server listed in the public MCP registry as eu.citedby/citedby. Check a page, AI-crawler access, llms.txt and backlinks of a site. Free, read-only. This page covers its hosted endpoint (https://citedby.eu/mcp).

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

CitedBy scores 74 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 CitedBy MCP server expose?

CitedBy exposes 4 tools: check_page, check_ai_crawler_access, check_llms_txt, backlinks. Their descriptions and schemas cost roughly 354 tokens of context every time the server is loaded.

### Does the CitedBy MCP server require authentication?

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

### Is the CitedBy MCP server still maintained?

CitedBy is still listed as active in the MCP registry. We last reached this channel on 25 October 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://citedby.eu/mcp
- Repository: https://github.com/resaleiq/citedby-mcp
- Website: https://citedby.eu/mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/eu-citedby-citedby/citedby.xml
- Changelog JSON feed: https://verifymcp.io/servers/eu-citedby-citedby/citedby.json
- HTML version of this page: https://verifymcp.io/servers/eu-citedby-citedby/citedby