# UK Companies House Counterparty Preflight Check

> UK Companies House Counterparty Preflight Check is a paid API for AI agents from 138-197-9-7.sslip.io, paid per call via x402, $0.01/call, status down (last checked 2026-10-30).

Performs a preflight risk check on a UK company by company number, returning status (NORMAL, REVIEW, or NOT_FOUND) based on Companies House data including company status, registered office, and overdue accounts/confirmation statements.

## Facts

- Endpoint: GET https://138-197-9-7.sslip.io/v1/uk_company_counterparty_preflight?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uk-companies-house-counterparty-preflight-check-bde5e5b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xiIYjs730zsiZYXuh03Yw

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 uk-companies-house-counterparty-preflight-check-bde5e5b3
```

Example prompt: Can you do a quick preflight check on UK company number 12345678 — I want to know if they're in good standing, whether their accounts and confirmation statements are up to date, and whether we should flag them for review before onboarding?

## When to prefer this

Choose this endpoint when you need a fast, single-call preflight risk signal for a UK-registered company before initiating a business relationship, payment, or onboarding flow. It is ideal for automated KYB pipelines, supplier screening, and investment due diligence where you need a simple NORMAL/REVIEW/NOT_FOUND verdict rather than raw Companies House data. Prefer this over direct Companies House API calls when you want a pre-interpreted risk signal with overdue filing detection already handled.

## Known failure modes

- NOT_FOUND returned when company number does not exist or is malformed
- REVIEW status returned for companies that are dissolved, struck off, or have overdue filings
- API may return errors if Companies House upstream is unavailable
- Payment required error (402) if x402 payment header is missing or insufficient
- Invalid company number format may result in error or NOT_FOUND

## How this service works

UK Companies House company-level counterparty preflight: status, RO, accounts/confirmation overdue → NORMAL|REVIEW|NOT_FOUND

## Output

Returns a status string of NORMAL (company is active and filings are current), REVIEW (company has issues such as overdue accounts, overdue confirmation statement, dissolved status, or other red flags), or NOT_FOUND (company number does not exist in Companies House). May also include detail on registered office validity and specific overdue filing types.

## 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": [
      "company_number"
     ],
     "properties": {
      "company_number": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uk-companies-house-counterparty-preflight-check-bde5e5b3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 138-197-9-7.sslip.io](https://www.zero.xyz/host/138-197-9-7.sslip.io/llms.txt)