# W System EU Business Data, free, Without a key, POST /kyb/check: Business verification API

> EU e-invoicing and business-data API: VAT/VIES and EORI validation, KYB, sanctions screening, EN 16931 e-invoice validation, Peppol lookup. Pay per call via x402 or use an API key, MCP server available.

W System EU Business Data's business verification API on its Without a key plan. It costs $0.00 per 1,000 companies. W System EU Business Data's docs list 6 of the 11 key fields we check: Registered name, Entity number, Entity type, Status, Formation date, Principal address.
We haven't run W System EU Business Data through [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt) yet.
This plan is free. We rank 903 plans for business verification APIs by price. Half the plans cost $7.895 per 1,000 companies or less.
[CharityAPI's $15 monthly plan](https://datacircle.dev/business-verification-apis/charityapi/15-monthly-paid-get-api-organizations-ein/llms.txt) is the cheapest paid plan per 1,000 companies. CharityAPI's plan covers companies in the United States only. CharityAPI's $15 monthly plan charges nothing per call. You get as many companies as CharityAPI's rate limit allows.
[Scoris's €19 pack](https://datacircle.dev/business-verification-apis/scoris/19-pack/llms.txt) covers any number of companies in 8 countries only. Scoris's €19 pack costs more up front than CharityAPI's $15 monthly plan.
[GovFiles](https://datacircle.dev/business-verification-apis/govfiles/top-up/llms.txt), [Didit](https://datacircle.dev/business-verification-apis/didit/top-up-from-50/llms.txt) and [CompanyData.com](https://datacircle.dev/business-verification-apis/companydata-com/249-monthly/llms.txt) are the best business verification API providers in the Datacircle benchmark for companies in any country.

- This page: https://datacircle.dev/business-verification-apis/w-system-eu-business-data/free-without-a-key-post-kyb-check
- [Business verification API: the 12 best providers compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://wsystem.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `POST https://api.wsystem.dev/kyb/check`
- API key: not needed
- Its API docs: https://wsystem.dev/kyb-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Sold by: W System EU Business Data (https://wsystem.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 55%
- Registered name: ✓
- Entity number: ✓
- Entity type: ✓
- Status: ✓
- Formation date: ✓
- Principal address: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Validate one EU VAT number (VIES) · Validate up to 100 EU VAT numbers · Look up a company in official EU business registers · Batch company-registry lookup (max 25 queries) · Screen a name against EU, UN, OFAC and UK sanctions lists · Batch sanctions screening (max 50 names) · Validate one EU EORI number (EC EOS) · Validate up to 100 EU EORI numbers · Validate an EU e-invoice (EN 16931, XRechnung, UBL, CII, ZUGFeRD/Factur-X PDF) · Read an incoming EU e-invoice (UBL, CII, ZUGFeRD/Factur-X PDF) into JSON · Create a valid EU e-invoice (UBL 2.1) from simple JSON · "Can I e-invoice this company?" VAT + Peppol + country mandate lookup · Counterparty due-diligence report (VAT, register, sanctions, EORI, LEI, Peppol) with risk flags · SANDBOX: verify buyer -> create -> validate -> route -> transmit (mock or partner Peppol sandbox) -> signed evidence receipt

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: EU e-invoicing and business-data API: VAT/VIES and EORI validation, KYB, sanctions screening, EN 16931 e-invoice validation, Peppol lookup. Pay per call via x402 or use an API key, MCP server available.

## Data

- Freshness: live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- Countries: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden
- Keep data: no limit
- Use data: Do not use the Service unlawfully, try to get around quotas (for example by rotating IP addresses), resell raw access without permission, or send loads that harm the Service or the official sources behind it.

## Plan

- Pay: $0
- You get: 20 credits a day
- Enough for: 20 calls a day

## Rate limit

- Per day: 20
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: company, Content-Type header "application/json". Optional: requester, threshold
- Method: POST
- Path: /kyb/check

## About the plan

- Plan: Without a key
- Who can get it: anyone

## The 35 fields the plan's answer can hold

lookup status, country, registry ID, name, legal form, status, active, address, postal code, city, registration date, VAT ID, activity code, activity, website, employees, LEI, source, source URL, normalized status, raw status, input, company name, verdict, verdict reasons, VAT status, VAT valid, VAT registered name, VAT registered address, VIES consultation number, VIES request date, sanctions status, sanctions top score, sanctions matches, sanctions lists date

## W System EU Business Data's plans (8)

- [W System EU Business Data, free, Without a key, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/free-without-a-key-post-kyb-check/llms.txt): $0.00 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- [W System EU Business Data, free API key, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/free-api-key-post-kyb-check/llms.txt): $0.00 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- [W System EU Business Data, pay as you go, Pay per call (x402), POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/pay-as-you-go-pay-per-call-x402-post-kyb-check/llms.txt): $45.00 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- [W System EU Business Data, €19 monthly, Starter, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/19-monthly-starter-post-kyb-check/llms.txt): $21.381 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- [W System EU Business Data, €49 monthly, Peppol Starter, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/49-monthly-peppol-starter-post-kyb-check/llms.txt): $55.14 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- [W System EU Business Data, €49 monthly, Pro, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/49-monthly-pro-post-kyb-check/llms.txt): $11.028 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- [W System EU Business Data, €199 monthly, Peppol Growth, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/199-monthly-peppol-growth-post-kyb-check/llms.txt): $44.787 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)
- [W System EU Business Data, €599 monthly, Peppol Scale, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/599-monthly-peppol-scale-post-kyb-check/llms.txt): $33.703 per 1,000, 55% complete, live (sanctions status, sanctions top score, sanctions matches, sanctions lists date: 1 day)

## W System EU Business Data's calls (3)

- `POST /company/batch`: [W System EU Business Data, free, Without a key, POST /company/batch](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/free-without-a-key-post-company-batch/llms.txt)
- `GET /company`: [W System EU Business Data, free, Without a key, GET /company](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/free-without-a-key-get-company/llms.txt)
- `POST /kyb/check`: [W System EU Business Data, free, Without a key, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/free-without-a-key-post-kyb-check/llms.txt)

## W System EU Business Data's APIs (1)

- [W System EU Business Data: business verification API pricing, 8 plans, POST /kyb/check](https://datacircle.dev/business-verification-apis/w-system-eu-business-data/free-without-a-key-post-kyb-check/llms.txt)

## W System EU Business Data: business verification API alternatives

- [IsValid, €9 monthly, Starter, GET /v0/pl/krs](https://datacircle.dev/business-verification-apis/isvalid/9-monthly-starter-get-v0-pl-krs/llms.txt): $0.034 per 1,000, 55% complete, live
- [NeuralVerge, $1,000 monthly, Enterprise, POST /functions/v1/run-lei-lookup-companies-search](https://datacircle.dev/business-verification-apis/neuralverge/1000-monthly-enterprise-post-functions-v1-run-lei-lookup-companies-search/llms.txt): $1.00 per 1,000, 55% complete, live
- [Parse, $1,000 monthly, Company, GET /scraper/8ceea6f9-34d2-4d7f-adf1-fc7bdd90b476/search_entities](https://datacircle.dev/business-verification-apis/parse/1000-monthly-company-get-scraper-8ceea6f9-34d2-4d7f-adf1-fc7bdd90b476-search-entities/llms.txt): $10.00 per 1,000, 55% complete, live
- [Scavio, top-up from $25](https://datacircle.dev/business-verification-apis/scavio/top-up-from-25/llms.txt): $10.00 per 1,000, 45% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-06.

- https://api.wsystem.dev/billing/plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://api.wsystem.dev/company?q=552032534&country=FR&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://api.wsystem.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://wsystem.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://wsystem.dev/eu-company-registry-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://wsystem.dev/kyb-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://wsystem.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://wsystem.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://wsystem.dev/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing