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.
npx skills add Nolpak14/getregdata --skill companies-house-ukgit clone --depth 1 https://github.com/Nolpak14/getregdataWrote 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.
[](https://agentmods.dev/skills/nolpak14/getregdata/companies-house-uk)<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.
<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>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00149 | $0.02319 |
| Opus 5.5 | $0.00060 | $0.00928 |
| Sonnet 5.5 | $0.00030 | $0.00464 |
| Haiku 4.5 | $0.00015 | $0.00232 |
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 24d 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) How it starts
The opening of the file, as written. The whole thing — 163 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)
- Register a free account and create an application at https://developer.company-information.service.gov.uk → Manage applications → create an API key (a "REST API" / "Live" key).
- 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.
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.
- 24d ago Changed · +5 lines 66e0e549ed20
- 1mo ago First seen · 158 lines · 149 tokens per session scan A 25f30134e15d
companies-house-uk is a skill published in the GitHub repository Nolpak14/getregdata (6 stars, last pushed today), licensed MIT. It adds 149 tokens to every session and 2,319 once invoked, about $0.0006 per session on Opus 5.5. 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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