Connect UK Companies House to Copilot Studio
Query UK Companies House directly from Copilot Studio. Arlet links the two through one MCP connection and takes care of API keys.
Connects your AI client to the Companies House Public Data API (api.company-information.service.gov.uk), the official register of companies in England, Wales, Scotland and Northern Ireland.
Tools (all read-only):
- search_companies: search the register by name or number and get company numbers, status, type, incorporation date and registered address.
- get_company_profile: full profile of one company (status, type, SIC codes, accounts and confirmation statement due dates, registered office, previous names).
- list_officers: current and resigned directors and secretaries with role, appointment/resignation dates, nationality and occupation.
- list_filing_history: filings (accounts, confirmation statements, officer changes, charges, resolutions ...) with an optional category filter.
- list_persons_with_significant_control: PSC register entries (individuals, corporate entities, legal persons) with their natures of control.
Authentication: HTTP Basic with your own API key (free registration at the Companies House Developer Hub; 600 requests per 5 minutes per key).
Licence: Companies House data is Crown copyright and reusable under the Open Government Licence v3.0. Each response carries the source and licence.
How to connect UK Companies House to Copilot Studio
- 1
In the Arlet dashboard, open Data tools, find UK Companies House, set the API key issued by UK Companies House and switch it on.
- 2
Sign in to Copilot Studio with your work account, create a new agent (or open an existing one), and in the Build tab choose Tools → + → Add → Model Context Protocol (MCP) in the right panel.
- 3
In the Add MCP server form, enter "Arlet" as the Server name, https://mcp.arlet.dev/mcp/ as the Server URL, choose OAuth 2.0 for Authentication and "Dynamic (detected)" for Configuration type, then click Add. No Client ID / Secret is needed.
- 4
On the Select a connection screen, choose Create new connection → Create, then sign in with Google on the Arlet authorization screen and click Allow. Click Add to attach the tool to the agent, then Publish to use it from Microsoft 365 Copilot.
Requires a Microsoft work account and a Copilot Studio license (or trial). MCP is available only for agents using generative orchestration and not in Copilot Studio in Teams.