# Services from api.wsystem.dev on Zero

> api.wsystem.dev serves 14 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/api.wsystem.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.wsystem.dev/health.json

## Services

- [EU VAT Number Validation via VIES (W System API)](https://www.zero.xyz/c/eu-vat-number-validation-via-vies-w-system-api-d003bd8b/llms.txt): $0.01/call via x402. Validates an EU VAT number against the official VIES system, returning validity status, registered business name, address, and a consultation (proof) number for all 27 EU member states plus Northern Ireland (XI).
- [EU EORI Number Validator (EC EOS)](https://www.zero.xyz/c/eu-eori-number-validator-ec-eos-8a210ec4/llms.txt): $0.01/call via x402. Validates an EU EORI number against the official European Commission EOS system, returning validity status plus name and address when disclosed by the registrant.
- [W System Sanctions Screening API](https://www.zero.xyz/c/w-system-sanctions-screening-api-5d33bd6e/llms.txt): $0.01/call via x402. Screens a person or company name against EU, UN, OFAC SDN, and UK sanctions lists using fuzzy matching with 0–100 similarity scores, refreshed daily
- [EU E-Invoice Routing Check (VIES + Peppol + Mandate)](https://www.zero.xyz/c/eu-e-invoice-routing-check-vies-peppol-mandate-57fd8d97/llms.txt): $0.02/call via x402. Determines whether a company can receive e-invoices by checking EU VAT validity, Peppol Directory registration, country-level B2B mandate status, and recommended format
- [Counterparty Due-Diligence Report (VAT + Sanctions + EORI + LEI + Peppol)](https://www.zero.xyz/c/counterparty-due-diligence-report-vat-sanctions-eori-lei-peppol-775fc68e/llms.txt): $0.49/call via x402. Runs a comprehensive due-diligence check on an EU company combining VAT validation, business register lookup, sanctions screening, EORI, GLEIF LEI, and Peppol status into a single risk verdict with sources and timestamp.
- [EU E-Invoice Validator (EN 16931 / XRechnung / ZUGFeRD)](https://www.zero.xyz/c/eu-e-invoice-validator-en-16931-xrechnung-zugferd-1a2814d3/llms.txt): $0.03/call via x402. Validates an EU e-invoice (UBL, CII, or ZUGFeRD/Factur-X PDF) against official EN 16931 and XRechnung rules, returning structured errors with rule IDs and plain-English fix descriptions.
- [W System KYB Check – EU VAT, EORI & Company Validation](https://www.zero.xyz/c/w-system-kyb-check-eu-vat-eori-company-validation-bccfd337/llms.txt): $0.045/call via x402. Runs a comprehensive Know Your Business (KYB) check on a company by validating its EU VAT number (via VIES), EORI number, company registry details, and sanctions exposure, returning a pass/fail verdict with reasons.
- [W System Batch Company/VAT/EORI Lookup](https://www.zero.xyz/c/w-system-batch-company-vat-eori-lookup-784a8716/llms.txt): $0.1/call via x402. Validates multiple EU VAT numbers (via VIES) and/or EORI numbers in a single batch POST request, returning validity, name, and address for each query.
- [EU E-Invoice Sandbox Send Flow](https://www.zero.xyz/c/eu-e-invoice-sandbox-send-flow-cf07d156/llms.txt): $0.08/call via x402. Runs a full EU e-invoice send pipeline in sandbox mode: VIES buyer check, sanctions screening, EN 16931 UBL creation/validation, Peppol routing, and sandbox transport with a signed evidence receipt — no real buyer is reached.
- [W System EU Company Registry Lookup](https://www.zero.xyz/c/w-system-eu-company-registry-lookup-a126d6f3/llms.txt): $0.01/call via x402. Looks up EU company information by company name or registration number from official European company registries
- [W System EORI Batch Validation](https://www.zero.xyz/c/w-system-eori-batch-validation-0e9619cb/llms.txt): $0.1/call via x402. Validates a batch of EU EORI numbers in a single POST call against the official EC EOS registry, returning validity status, name, and address for each.
- [W System Batch VAT Validation (VIES)](https://www.zero.xyz/c/w-system-batch-vat-validation-vies-6669491e/llms.txt): $0.1/call via x402. Validates multiple EU VAT numbers in a single batch call against the official VIES system, returning validity, name, and address for each.
- [EU E-Invoice Generator (UBL 2.1)](https://www.zero.xyz/c/eu-e-invoice-generator-ubl-2-1-153736fe/llms.txt): $0.08/call via x402. Converts simple JSON invoice data into a validated EU e-invoice in UBL 2.1 format (EN 16931, XRechnung, or Peppol BIS 3), with auto-computed totals and VAT breakdown
- [W System Batch Sanctions Screening API](https://www.zero.xyz/c/w-system-batch-sanctions-screening-api-f45a66c4/llms.txt): $0.1/call via x402. Screens a batch of person or company names against EU, UN, OFAC SDN, and UK official sanctions lists using fuzzy matching, returning match results with configurable similarity threshold.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)