# UK Data: UK Companies House

> UK Companies House and KYB: search, officers, owners (PSC), filings, charges, banned directors

- name: uk.co.reliness/uk-companies
- version: 1.5.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 89/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/uk.co.reliness%2Fuk-companies
- tools: https://api.protogrid.dev/v1/servers/uk.co.reliness%2Fuk-companies/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "uk-companies": {
      "type": "http",
      "url": "https://ukdata.reliness.co.uk/mcp/uk-companies",
      "headers": {
        "Authorization": "Bearer ${UK_COMPANIES_TOKEN}"
      }
    }
  }
}
```

Placeholders to fill: `${UK_COMPANIES_TOKEN}`.

## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-1d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 89/100 (new)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 11 of 11 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,486 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 3 of the 7 days needed

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 11, about 1,486 tokens to load them all
- tool set hash: ddcc6f7f1d06996a274b824253416925
- tools last changed: 2026-11-04T23:55:29.683Z
- badge: [![protogrid quality](https://protogrid.dev/badge/uk.co.reliness/uk-companies.svg)](https://protogrid.dev/servers/uk.co.reliness/uk-companies)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-11-04 `kyb_check` added
  - Full KYB (know your business) check on a UK company number in one call: profile and status, officers, owners (PSCs), overdue filings, registered charges, insolvency, a disqualified-director screen on the board, and Gazette notices, with a risk summary. For supplier onboarding, due diligence and anti-fraud. (cost: 6 credits)
- 2026-11-04 `company_insolvency` added
  - Insolvency cases for a UK company number from Companies House: liquidation, administration, receivership, with dates and the insolvency practitioners handling it. (cost: 1 credit)
- 2026-11-04 `company_charges` added
  - Registered charges and mortgages (secured debt) against a UK company number: status, amounts, who the debt is owed to. For credit, lending and due-diligence checks. (cost: 1 credit)
- 2026-11-04 `disqualified_officers` added
  - Search the UK register of disqualified company directors by name. Check whether a person has been banned from running a company, for KYB, onboarding and fraud screening. (cost: 1 credit)
- 2026-11-04 `officer_appointments` added
  - All directorships a person holds or has held across UK companies (Companies House appointments). Find every company a director is tied to, for due diligence and conflict checks. Pass a name or an officerId. (cost: 1 credit)
- 2026-11-04 `companies_incorporated` changed (annotations)
- 2026-11-04 `company_filings` changed (annotations)
- 2026-11-04 `company_pscs` changed (annotations)
- 2026-11-04 `company_officers` changed (annotations)
- 2026-11-04 `company_profile` changed (annotations)

Full history: https://api.protogrid.dev/v1/servers/uk.co.reliness%2Fuk-companies/changes

## Remotes

- https://ukdata.reliness.co.uk/mcp/uk-companies (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (11)

- `companies_incorporated`: 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_charges`: Registered charges and mortgages (secured debt) against a UK company number: status, amounts, who the debt is owed to. For credit, lending and due-diligence checks. (cost: 1 credit)
- `company_filings`: Filing history for a company number (accounts, confirmation statements, officer changes, charges). (cost: 1 credit)
- `company_insolvency`: Insolvency cases for a UK company number from Companies House: liquidation, administration, receivership, with dates and the insolvency practitioners handling it. (cost: 1 credit)
- `company_officers`: Directors and secretaries for a company number, with appointment and resignation dates. (cost: 1 credit)
- `company_profile`: 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`: Persons with significant control (beneficial owners) for a company number. (cost: 1 credit)
- `company_search`: Search Companies House by name. Returns company number, status, type, incorporation date, address. (cost: 1 credit)
- `disqualified_officers`: Search the UK register of disqualified company directors by name. Check whether a person has been banned from running a company, for KYB, onboarding and fraud screening. (cost: 1 credit)
- `kyb_check`: Full KYB (know your business) check on a UK company number in one call: profile and status, officers, owners (PSCs), overdue filings, registered charges, insolvency, a disqualified-director screen on the board, and Gazette notices, with a risk summary. For supplier onboarding, due diligence and anti-fraud. (cost: 6 credits)
- `officer_appointments`: All directorships a person holds or has held across UK companies (Companies House appointments). Find every company a director is tied to, for due diligence and conflict checks. Pass a name or an officerId. (cost: 1 credit)