# `uk.co.reliness/uk-companies` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/uk.co.reliness/uk-companies
- JSON: https://anlyon.dev/api/v1/servers/uk.co.reliness/uk-companies
- Version: 1.4.0 (active)
- Publisher: uk.co.reliness (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Metadata from the official MCP Registry, synced 2026-11-04T11:18:16.047Z

Title and description, as the publisher wrote them:

```untrusted-server-text
UK Data: UK Companies House
UK Companies House: company search, profiles, officers, owners (PSC), filings, new incorporations
```

Scanned 2026-11-04T11:19:12.446Z over streamable-http.

**6 tools: 4 change things and 2 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 4 | ask |
| Only reads | read | 2 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | none |
| untrusted-input | Brings in text someone else can write: web pages, inbound email, messages, issues and comments. | none |
| outbound | Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL. | none |

## Findings

No check matched anything in these tool definitions.


## Changes things (4)

Creates or changes something that can be changed back. Claude Code: ask.

### `company_filings`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
Filing history for a company number (accounts, confirmation statements, officer changes, charges). (cost: 1 credit)
```

### `company_officers`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
Directors and secretaries for a company number, with appointment and resignation dates. (cost: 1 credit)
```

### `company_profile`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
Full Companies House profile for a company number: status, SIC codes, registered office, accounts and confirmation statement due dates and overdue flags, charges and insolvency flags. (cost: 1 credit)
```

### `company_pscs`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
Persons with significant control (beneficial owners) for a company number. (cost: 1 credit)
```

## Only reads (2)

Looks things up and changes nothing. Claude Code: allow.

### `companies_incorporated`

- The description's first verb is "find": a word for reading.

Description, as the server wrote it:

```untrusted-server-text
Find companies by incorporation date range, SIC codes, status, location or name fragment (Companies House advanced search). New-business lead lists. (cost: 2 credits)
```

### `company_search`

- The name "company_search" says "search": a word for reading.

Description, as the server wrote it:

```untrusted-server-text
Search Companies House by name. Returns company number, status, type, incorporation date, address. (cost: 1 credit)
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `uk-companies`:

```json
{
  "permissions": {
    "allow": [
      "mcp__uk-companies__company_search",
      "mcp__uk-companies__companies_incorporated"
    ],
    "ask": [
      "mcp__uk-companies__company_profile",
      "mcp__uk-companies__company_officers",
      "mcp__uk-companies__company_pscs",
      "mcp__uk-companies__company_filings"
    ],
    "deny": []
  }
}
```