# Erechio

**Canonical:** https://apis.io/providers/erechio/  
**Website:** https://erechio.de  
**APIs profiled:** 1

Erechio provides a free REST API for validating German e‑invoices according to XRechnung and ZUGFeRD standards, using the official KoSIT rules. Users can upload invoices via the browser or API, receive detailed error explanations in German, and test up to 50 documents per month without payment. The service is hosted in Nürnberg, Germany, and offers a public endpoint at https://api.erechio.de. An English quickstart is at https://erechio.de/en/api.html; the German docs are the full reference. The free test key (50 documents per month) is open to everyone; paid plans are for businesses based in Germany.

## Kin Score — 39.2 / 100 (thin)

Scored 2026-11-13 under rubric 0.28.0.

| Facet | Score |
|---|---|
| Discoverability | 66.1 |
| Contract Quality | 63.2 |
| Contract Governance | 22.0 |
| Operational Transparency | 14.3 |
| Developer Ergonomics | 33.3 |
| Access Clarity | 25.5 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 18.6 (matched via fallback).

## Agent readiness — 28.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | derived |
| OpenAPI Examples | verified |
| Rate Limit Signal | verified |
| Event Surface Described | no |
| Agent Skills | no |
| 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 | na |
| MCP Tool Quality | na |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (2)

- **Erechio Prüfen API** — E-Rechnung prüfen
- **Erechio Status API** — Zustand des Dienstes

## Agentic access (1)

- **Erechio Agentic Access** — 2 operations

## Security (2)

- **Erechio Authentication** — apiKey/http · 2 schemes
- **Erechio Domain Security** — TLSv1.3 · DMARC

## Tags

German, e-invoice, Validation, XRechnung, ZUGFeRD, KoSIT

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