# Eckari UK Companies House Search

> Eckari UK Companies House Search is a paid API for AI agents from api.eckari.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-09).

Search the UK Companies House register by company name or keyword, returning matching companies with number, status, type, dates and address.

## Facts

- Endpoint: GET https://api.eckari.com/v1/companies/uk/search?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eckari-uk-companies-house-search-3a6d0cae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZQX3qjbyVddUIOmnLqVke

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 eckari-uk-companies-house-search-3a6d0cae
```

Example prompt: Can you search Companies House for 'Tesco PLC' and give me the company number, status, and registered address?

## When to prefer this

Use this endpoint when you have only a company name or keyword and need to resolve it to a Companies House company_number before calling per-company detail endpoints. Prefer this over per-company lookup endpoints when the company number is unknown. Use the returned company_number from this search to chain into profile, filings, or accounts endpoints. Best suited for UK-registered entities; not applicable for companies registered outside the UK.

## Known failure modes

- Query too short (under 2 chars) — returns validation error
- No matching companies found — returns empty items array with total=0
- offset exceeds 10,000 — returns validation error
- Rate limiting or payment failure via x402 — returns 402 Payment Required
- Companies House API downstream outage — returns 5xx error
- Query returns unexpected company types not handled by caller

## How this service works

Search the UK Companies House register by name or keyword and return matching companies with company number, register status and a derived is_active, type, incorporation and cessation dates and the register's one-line address snippet. Use this first when you only have a name, then call the per-company capabilities with the returned company_number. Ordering is the register's own, echoed as match_rank — a position, not a relevance score. Use when: Look up a UK company by name.

## Output

Returns a paginated list of matching companies, each with: company_name, company_number, status (e.g. active, dissolved, closed), is_active (boolean), type (e.g. ltd, plc, uk-establishment), date_of_creation, date_of_cessation (null if still active), and address_snippet. Also returns pagination metadata (total results, offset, has_more, next_offset) and echoes the original query. Results are ordered by the register's own match_rank (position, not relevance score).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "maxLength": 200,
       "minLength": 2,
       "description": "Company name or keyword to search for."
      },
      "limit": {
       "type": "integer",
       "maximum": 50,
       "minimum": 1,
       "description": "Maximum results to return (1-50). Default 10."
      },
      "offset": {
       "type": "integer",
       "maximum": 10000,
       "minimum": 0,
       "description": "Zero-based offset into the register's result set for paging. Pass back page.next_offset from the previous response; page.has_more says whether there is one."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "page": {
    "limit": 5,
    "total": 356,
    "offset": 0,
    "has_more": true,
    "returned": 5,
    "next_offset": 5
   },
   "items": [
    {
     "type": "plc",
     "status": "active",
     "is_active": true,
     "match_rank": 1,
     "company_name": "TESCO PLC",
     "company_number": "00445790",
     "address_snippet": "Tesco House, Shire Park, Kestrel Way, Welwyn Garden City, United Kingdom, AL7 1GA",
     "date_of_creation": "1947-11-27",
     "date_of_cessation": null
    },
    {
     "type": "ltd",
     "status": "active",
     "is_active": true,
     "match_rank": 2,
     "company_name": "KFORD TYRES (GORNAL) LTD",
     "company_number": "09384423",
     "address_snippet": "2 Dawley Brook Road, Kingswinford, England, DY6 7BD",
     "date_of_creation": "2015-01-12",
     "date_of_cessation": null
    },
    {
     "type": "ltd",
     "status": "dissolved",
     "is_active": false,
     "match_rank": 3,
     "company_name": "TESCO AQUA (FINCO2) LIMITED",
     "company_number": "05888957",
     "address_snippet": "1 More London Place, London, SE1 2AF",
     "date_of_creation": "2006-07-27",
     "date_of_cessation": "2025-11-12"
    },
    {
     "type": "uk-establishment",
     "status": "closed",
     "is_active": false,
     "match_rank": 4,
     "company_name": "TESCO AQUA (1LP) LIMITED",
     "company_number": "BR008975",
     "address_snippet": "New Tesco House, Cheshunt, Delamare Road, EN8 9SL",
     "date_of_creation": "2006-08-09",
     "date_of_cessation": null
    },
    {
     "type": "ltd",
     "status": "active",
     "is_active": true,
     "match_rank": 5,
     "company_name": "TESCO ATRATO DEPOT PROPCO LIMITED",
     "company_number": "06969533",
     "address_snippet": "Tesco House, Shire Park, Kestrel Way, Welwyn Garden City, United Kingdom, AL7 1GA",
     "date_of_creation": "2009-07-22",
     "date_of_cessation": null
    }
   ],
   "query": {
    "q": "Tesco plc"
   }
  },
  "meta": {
   "source": "companies_house",
   "version": "2.0.0",
   "freshness": "live",
   "capability": "company.uk.search"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eckari-uk-companies-house-search-3a6d0cae/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.eckari.com](https://www.zero.xyz/host/api.eckari.com/llms.txt)