UK Companies House due diligence and KYB (Registrum)

Connect it to your AI

Claude Code

claude mcp add --transport http uk-companies-house-mcp https://registrum.co.uk/api/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://registrum.co.uk/api/mcp

claude mcp add uk-companies-house-mcp -- npx -y @registrum/mcp@2.1.3

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "uk-companies-house-mcp": {
      "url": "https://registrum.co.uk/api/mcp"
    }
  }
}

Tools it offers

11 tools, as the server itself reported during our check on Oct 31, 2026.

• search_companySearch for UK companies by name. Returns a list of matching companies with their company number, status, type, and registered address. Use this first when you only have a company name and need its company number.
• get_companyGet an enriched profile for a UK company by its Companies House number. Returns name, status, type, incorporation date, registered address, SIC codes with descriptions, accounts status, confirmation statement status, and
• get_financialsGet structured financial data for a UK company, parsed from its iXBRL accounts filed at Companies House. Returns revenue, cost of sales, gross profit, operating profit, net profit, fixed assets, current assets, total equ
• get_directorsGet the current and past officers for a UK company. Despite the tool name, not every entry is a director: the list is the full officer register, so each entry carries an officer_role such as 'director', 'secretary', 'cor
• get_complianceCheck a UK company's ECCTA identity-verification status - who has verified their identity with Companies House, who is still pending, and who is overdue. The Economic Crime and Corporate Transparency Act requires every d
• get_pscGet the PSC (Persons with Significant Control) register for a UK company. Returns individuals, corporate entities, and legal persons who own 25%+ of shares, hold 25%+ of voting rights, or have significant influence or co
• get_bundleGet several views of one UK company in a single request: profile, ECCTA compliance, financials, PSCs and directors. Prefer this over calling get_company, get_compliance, get_financials, get_psc and get_directors separate
• get_psc_chainTrace the full ownership chain for a UK company by recursively following corporate entity PSCs. Returns a tree showing who ultimately controls the company - natural persons (UBOs), foreign entities, or legal persons - al
• get_networkMap the corporate network connected to a UK company via shared directors. Returns all companies connected through shared board members, up to the specified depth. Each connected company includes its name, number, status,
• searchSearch UK companies at Companies House by name or keywords. Returns an object with a results array; each result has id (company:<number>, pass it to fetch), title (company name, number and status) and url (the company pa
• fetchFetch one UK company by an id from search (company:<number>; a bare company number also works). Returns an object with id, title (company name), url (company page on registrum.co.uk), text (a plain-English summary follow

Questions