# wsystem-dev

**Canonical:** https://apis.io/providers/wsystem-dev/  
**Website:** https://wsystem.dev/  
**APIs profiled:** 1

W System provides a comprehensive e‑invoicing API suite for software teams, supporting European standards such as EN 16931, Peppol, and XRechnung. The platform offers invoice validation, generation of UBL documents, buyer identifier lookup, and sandbox testing with signed receipts. It targets developers needing to integrate invoicing, ERP, or shop software to meet upcoming regulatory deadlines across Belgium, France, Germany, the UK and other EU markets.

## Kin Score — 49.2 / 100 (developing)

Scored 2026-11-02 under rubric 0.26.0. Trend: flat (+0.0 from 49.2).

| Facet | Score |
|---|---|
| Discoverability | 56.7 |
| Contract Quality | 61.2 |
| Contract Governance | 22.0 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 32.7 |
| Access Clarity | 63.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 30.4 (matched via fallback).

## Agent readiness — 28.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: medium).

## APIs (8)

- **wsystem-dev Billing API** — The Billing API from wsystem-dev — 3 operation(s) for billing.
- **wsystem-dev Company API** — Official business-register lookup (FR, NO, FI, CZ, PL, EE; others via GLEIF LEI)
- **wsystem-dev E Invoice API** — EU e-invoice validation (EN 16931, XRechnung; UBL, CII, ZUGFeRD/Factur-X PDF) and creation (JSON -> UBL)
- **wsystem-dev EORI API** — EU EORI customs number validation via the EC EOS service
- **wsystem-dev Health API** — The Health API from wsystem-dev — 1 operation(s) for health.
- **wsystem-dev KYB API** — VAT + registry + sanctions in one call with a pass/review/fail verdict
- **wsystem-dev Sanctions API** — Name screening against EU, UN, OFAC SDN and UK sanctions lists (refreshed daily)
- **wsystem-dev VAT API** — EU VAT number validation via VIES (27 EU states + XI Northern Ireland)

## MCP servers (1)

- **wsystem-dev MCP Server** — Remote MCP server at api.wsystem.dev.

## Agentic access (1)

- **Wsystem Dev Agentic Access** — 28 operations · 12 acting · 1 human-in-the-loop

## Security (3)

- **Wsystem Dev Authentication** — 1 scheme
- **Wsystem Dev Domain Security** — TLSv1.3 · HSTS · DMARC
- **Wsystem Dev Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Wsystem Dev Plans Pricing**

## Tags

Company, E-Invoicing, European, Compliance

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/wsystem-dev/). Scores are computed from the provider's own public artifacts under a published rubric.