# Companies House UK Company Search

> Companies House UK Company Search is a paid API for AI agents from company.payapi.market, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Searches UK companies by name via Companies House, returning matches with company number, status, type, incorporation date, and registered address.

## Facts

- Endpoint: POST https://company.payapi.market/company-search
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/company-payapi-market-49fce102
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XA0Vtlwmm0OJX0f3w8A3L

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability company-payapi-market-49fce102 -d '<json body>'
```

Example prompt: Can you search Companies House for UK companies matching the name 'Acorn Digital Solutions' and show me up to 10 results including their company number, status, type, and registered address?

## When to prefer this

Use this endpoint when you need to search for UK-registered companies by name using official Companies House data. Ideal for due diligence, verifying business legitimacy, enriching CRM records with official company data, or resolving a company name to its official registration number. Prefer this over generic web searches when authoritative, structured UK company registry data is required.

## Known failure modes

- No matches found for the given query — returns empty results array
- Query string too vague or too short returns large number of unrelated matches
- Limit parameter outside 1–50 range returns a validation error
- Companies House API downstream outage returns a 5xx error
- Malformed request body returns a 400 bad request error

## How this service works

Search UK companies by name via Companies House — returns matches with number, status, type, incorporation date, address.

## Output

Returns a list of up to 50 matching UK companies, each including company name, Companies House number, status (e.g. active, dissolved), company type (e.g. ltd, plc), incorporation date, and registered address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "maximum": 50,
   "minimum": 1,
   "description": "Maximum number of matches to return (1-50)."
  },
  "query": {
   "type": "string",
   "description": "Company name (or partial name) to search."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/company-payapi-market-49fce102/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from company.payapi.market](https://www.zero.xyz/host/company.payapi.market/llms.txt)