# 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).

Performs Know Your Business (KYB) verification for UK companies using a Companies House registration number, returning structured compliance data with an audit trail.

## Facts

- Endpoint: POST https://api.strale.io/x402/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-b4535916
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uvaDstjpoD1swjkSa7Prg

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-b4535916 -d '<json body>'
```

Example prompt: Can you run a KYB essentials check on UK company number 12345678 and tell me if it's compliant and in good standing?

## When to prefer this

Use this endpoint when you need structured, audit-trailed KYB data specifically for UK-registered companies identified by a Companies House number. Prefer this over generic business search APIs when you need compliance-ready output with financial validation signals for UK entities.

## Known failure modes

- Invalid or malformed Companies House number returns a 4xx validation error
- Company not found in Companies House registry returns a not-found error
- Payment failure or insufficient USDC balance prevents the call from completing
- Rate limiting or service unavailability returns a 5xx error
- Dissolved or struck-off companies may return limited data

## How this service works

Company data, compliance checks, financial validation. Structured JSON with audit trails. Every capability independently quality-scored.

## Output

A structured JSON object containing UK company data pulled from Companies House, compliance indicators, financial validation signals, and an audit trail — all quality-scored and ready for downstream compliance workflows.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "company_number"
 ],
 "properties": {
  "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-b4535916/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)