companies-house-uk

companies-house-uk is a skill for Claude Code from Nolpak14/getregdata. It costs 149 tokens per session (2,262 once invoked), scanned A, original, MIT.

A lookup tool for UK companies using Companies House, the United Kingdom's official company register. It returns company status, directors, beneficial owners, filings, addresses, and business activity codes.

In plain words
What is it for?
It helps with know-your-business checks, counterparty verification, director and beneficial-owner research, and reviewing UK company filings.
Why use it?
It brings key registration and ownership information together for checking whether a UK company is active and who controls it.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the regdata-company-lookup plugin — 28 skills shipped together

Good fit It helps with know-your-business checks, counterparty verification, director and beneficial-owner research, and reviewing UK company filings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nolpak14/getregdata/companies-house-uk
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Nolpak14/getregdata --skill companies-house-uk
Clone the repo
git clone --depth 1 https://github.com/Nolpak14/getregdata

Made for: Claude Code.

Or install regdata-company-lookup, the plugin that ships this one along with the rest of its 28 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for companies-house-uk

README.md
[![agentmods](https://agentmods.dev/badge/skills/nolpak14/getregdata/companies-house-uk/github.svg)](https://agentmods.dev/skills/nolpak14/getregdata/companies-house-uk)
Your own site
<a href="https://agentmods.dev/skills/nolpak14/getregdata/companies-house-uk"><img src="https://agentmods.dev/badge/skills/nolpak14/getregdata/companies-house-uk/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for companies-house-uk

Your own site · 80×15
<a href="https://agentmods.dev/skills/nolpak14/getregdata/companies-house-uk"><img src="https://agentmods.dev/badge/skills/nolpak14/getregdata/companies-house-uk.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 149 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,262 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00149 $0.02262
Opus 5 $0.00075 $0.01131
Sonnet 5 $0.00030 $0.00452
Haiku 4.5 $0.00015 $0.00226

Measured 10d ago against content hash 25f30134e15d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

companies-house-uk scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

# curl uses "-u KEY:" (trailing colon = empty password)
skills/companies-house-uk/SKILL.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

companies-house-uk

Free, official UK company data from the Companies House Public Data API. This skill needs no paid actor and no Apify token - just a free Companies House API key. Use it as the front door for UK entity verification, and route to the paid regdata actors when you need a jurisdiction that has no free API.

Persona

You are a KYB / due-diligence analyst verifying UK companies against the official register. You resolve a company to its registered identity, confirm it is active, identify its directors and its beneficial owners (persons with significant control), and read its filing history for signals - all from the authoritative source, Companies House, not a commercial aggregator.

What this gives you (for free)

  • Company profile - number, status (active / dissolved / liquidation), incorporation date, registered office, SIC codes, accounts and confirmation-statement due dates.
  • Officers - directors and secretaries, roles, appointment dates, nationality, occupation, partial date of birth.
  • PSC (beneficial owners) - persons or entities with significant control, with the nature of that control (e.g. ownership of 75-100% of shares, voting rights, right to appoint the board).
  • Filing history - the sequence of statutory filings (accounts, confirmation statements, officer changes, charges).

Data is Crown copyright under the Open Government Licence (free reuse with attribution). Read-only.

Authentication (free, one-time)

  1. Register a free account and create an application at https://developer.company-information.service.gov.ukManage applications → create an API key (a "REST API" / "Live" key).
  2. Auth is HTTP Basic with the API key as the username and a blank password:
export CH_KEY=your_companies_house_api_key
# curl uses "-u KEY:" (trailing colon = empty password)
curl -u "$CH_KEY:" "https://api.company-information.service.gov.uk/company/00445790"

There is no per-call charge. Rate limit is 600 requests per 5-minute window across all endpoints; exceeding it returns 429 Too Many Requests until the window resets. Batch and back off - there is no burst allowance.

Read the full file on GitHub · 158 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 158 lines · 149 tokens per session scan A 25f30134e15d

Subscribe to this mod's changes

companies-house-uk is a skill published in the GitHub repository Nolpak14/getregdata (6 stars, last pushed 1mo ago), licensed MIT. It adds 149 tokens to every session and 2,262 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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