# UK Company Due Diligence Check

> UK Company Due Diligence Check is a paid API for AI agents from uk-company-check.fly.dev, paid per call via x402, $0.025/call, status unknown (last checked 2026-10-11).

Performs a comprehensive one-call due diligence check on a UK company using Companies House data, returning profile, directors, beneficial owners, charges, insolvency status, overdue filings, and risk flags.

## Facts

- Endpoint: GET https://uk-company-check.fly.dev/v1/uk/company/:number/check?utm_source=zero.xyz
- Price: $0.025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uk-company-due-diligence-check-095b5244
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JpgW-4pfKYXZRxlCbFFCG

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-company-due-diligence-check-095b5244
```

Example prompt: Can you run a full due diligence check on UK company number 00445790 — I want to know if it's safe to deal with, including any director red flags, beneficial owners, charges, or insolvency history?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call due diligence snapshot of a UK-registered company — combining profile, director history, ownership, charges, insolvency, and risk flags in one response. Prefer this over the raw Companies House profile endpoint when you need risk assessment beyond basic company info, or when checking for phoenix directors and PSCs matters. Ideal for supplier vetting, investor screening, fraud detection, and KYC workflows involving UK companies.

## Known failure modes

- Invalid or non-existent company number returns a 404 or empty result
- Company number format mismatch (e.g. missing leading zeros) may return no data
- Rate limiting or upstream Companies House API downtime may cause 503 errors
- Payment of 0.025 USDC required per call via x402; missing payment header results in 402 error
- Dissolved or struck-off companies may return limited data

## How this service works

Is this UK company legit and safe to deal with? One-call due-diligence check from Companies House: profile, directors and their track record at other companies (phoenix-company check), beneficial owners (PSCs), charges, insolvency, overdue filings and risk flags, with a source link for every fact.

## Output

A structured due diligence report covering: company profile (name, status, type, address), list of directors with their track record at other companies (phoenix-company indicators), persons with significant control (PSCs/beneficial owners), registered charges, insolvency events, overdue filing history, and aggregated risk flags — each fact accompanied by a source link to the underlying Companies House record.

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "number"
     ],
     "properties": {
      "number": {
       "type": "string",
       "description": "UK company number, e.g. 00445790 or SC123456"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uk-company-due-diligence-check-095b5244/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from uk-company-check.fly.dev](https://www.zero.xyz/host/uk-company-check.fly.dev/llms.txt)