# Strale KYB Essentials UK

> Strale KYB Essentials UK is a paid API for AI agents from api.strale.io, paid per call via x402, $1.62/call, status unknown (last checked 2026-09-14).

Looks up essential Know Your Business (KYB) data for a UK-registered company using its Companies House number, with an audit trail.

## Facts

- Endpoint: POST https://api.strale.io/x402/v2/solutions/kyb-essentials-uk
- Price: $1.62/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-kyb-essentials-uk-aa1a2ffa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ulbQrQ75XO-NjQ6DEw5tm

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 strale-kyb-essentials-uk-aa1a2ffa -d '<json body>'
```

Example prompt: Can you run a KYB check on the UK company with Companies House number 09876543 and tell me if it's active and who the directors are?

## When to prefer this

Choose this endpoint when you need fast, structured KYB data for a UK company and have its Companies House number ready. Ideal for compliance workflows, vendor onboarding, or due diligence where an audit trail with cryptographic integrity is required. Prefer this over manual Companies House lookups when you need machine-readable JSON with guaranteed audit records.

## Known failure modes

- Invalid or malformed Companies House number returns an error
- Company number not found in Companies House registry
- Rate limiting or payment failure (x402 micropayment rejected)
- Upstream Companies House API unavailability causing timeout or partial data

## How this service works

The trust layer for AI agents — 250+ independently tested data capabilities across 27 countries. Execute capabilities via REST, MCP, A2A, or x402 micropayments. Every call returns an audit record with cryptographic chain hashing.

## Output

Returns structured JSON with essential KYB data for the UK company (e.g. company name, status, registered address, incorporation date, company type, officer details) plus a cryptographically hashed audit record for compliance traceability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "vat_number": {
   "type": "string",
   "description": "EU VAT number with country prefix (e.g. ATU14189108). Optional — used for VIES validation when the registry lookup does not return one (e.g. AT, SK); auto-derived from registry data where possible."
  },
  "company_number": {
   "type": "string",
   "description": "UK Companies House number"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-kyb-essentials-uk-aa1a2ffa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)