---
title: "Run a KYB check: registry, sanctions, VAT/VIES and domain"
method: POST
path: "/v1/kyb/check"
---

# Run a KYB check: registry, sanctions, VAT/VIES and domain

`POST /v1/kyb/check`

## Request

- Base URL: `https://api.limitguard.ai`
- URL: `https://api.limitguard.ai/v1/kyb/check`
- Auth: one of:
  - API key in header `X-API-Key`
  - none

Know Your Business verification: company registration, sanctions screening, VAT/VIES, and domain analysis in one call.

## Request body

- object
  - `entity_id` string, required: Internal entity identifier
  - `registration_number` string, required: Company registration number
  - `country` string, required: ISO 3166-1 alpha-2 country code
  - `entity_name` string: Legal entity name (optional)
  - `vat_number` string: VAT number for VIES verification
  - `domain` string: Company domain for web presence check

## Response `200`

Success

## Other responses

- `402`: Payment required. The x402 v2 challenge is in the base64 PAYMENT-REQUIRED header and the JSON body; pay and retry with PAYMENT-SIGNATURE, or send X-API-Key with prepaid balance.

---

[API](https://skmtc.dev/limitguard/apis/limitguard-ai.md) · [All operations](https://skmtc.dev/limitguard/apis/limitguard-ai/llms.txt) · [OpenAPI document](https://skmtc.dev/limitguard/apis/limitguard-ai/revisions/8f9718bce4a1?raw)