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Halowerk Entity Monitor – UK Companies House Search & Filing Tracker
x402
Halowerk Entity Monitor – UK Companies House Search & Filing Tracker is a paid API for AI agents from finanz.halowerk.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Searches UK companies by name or monitors a specific company's Companies House profile and filing history, returning new filings since a given baseline transaction ID or filing date.
Price / call$0.005
Success—
StatusUnknown
How this service works
In search mode, finds UK companies by name. In monitor mode, fetches the current company profile and filing history and compares it with the transaction id or filing date supplied by the caller. The response states whether the baseline was found and lists filings newer than that baseline. This is a pull comparison, not a subscription or push alert. Requests are rate-limited in code below the Companies House ceiling of 600 requests per five minutes.
Output
In search mode: a list of UK companies matching the provided name. In monitor mode: the company's current Companies House profile, its filing history, a flag indicating whether the supplied baseline (transaction ID or filing date) was found, and a list of filings newer than that baseline.
Example use cases
Due diligence filing check
“I'm doing due diligence on a potential partner — can you pull the Companies House profile for 'Starling Bank Limited' and list any filings made since filing date 2024-01-01?”
Ongoing supplier monitoring
“Monitor 'Monzo Bank Limited' on Companies House and tell me if anything new has been filed since the last transaction ID I have, which is txn_9f3a21b.”
Finding the right registered entity
“I'm not sure of the exact registered name — can you search Companies House for companies matching 'Wise' so I can pick the right legal entity?”
Technical details
Endpoint
POSThttps://finanz.halowerk.com/v1/entity-monitorWhen to prefer
Choose this endpoint when you need to search for UK-registered companies by name or track changes to a specific company's Companies House filing record since a known checkpoint. It is purpose-built for UK corporate registry data with built-in change detection, making it superior to generic web scraping or raw Companies House API calls for agent-based monitoring workflows. Not suitable for non-UK companies, SEC filings, or subscription-based push alerts.
Side effects
- Company not found on Companies House — returns empty results or not-found flag
- Baseline transaction ID or filing date not matched in filing history — baseline-found flag set to false
- Rate limit approached — requests are throttled below Companies House ceiling of 600 per 5 minutes
- Invalid or missing mode parameter — request rejected or undefined behavior
- Network or Companies House API unavailability — upstream error returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | |
| query | string | Company name for action=search. |
| action | string | |
| company_number | string | Companies House number for action=monitor. |
| known_filing_date | string | Fallback baseline date, YYYY-MM-DD. |
| known_latest_transaction_id | string | Last transaction id seen by the caller. |
Tags
x402
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