# EU E-Invoice API

> REST API that validates, parses and generates EU e-invoices: XRechnung, ZUGFeRD / Factur-X, Peppol BIS Billing 3.0, the French rules BR-FR, CIUS-RO, HR-CIUS, FatturaPA, KSeF FA(3) and plain EN 16931, with the official rule sets. Stateless, hosted in Germany, permanent free plan of 100 documents a month.

Use the API to check an e-invoice before sending it, to read a received e-invoice into JSON, or to create XRechnung, ZUGFeRD, Peppol, FatturaPA, KSeF and other formats from JSON. It validates, parses and generates documents only; delivery through Peppol, SDI, KSeF or a French platform is done by an access point or platform of your choice.

## Docs

- [Quickstart](https://einvoice-api.eu/docs/quickstart.md): API key, first validation call, response format
- [API guide](https://einvoice-api.eu/docs/api.md): endpoints, input, formats, rule sets, findings, errors, plans
- [Code examples](https://einvoice-api.eu/docs/examples.md): curl, Python, TypeScript, Java and C#
- [MCP server](https://einvoice-api.eu/docs/mcp.md): tools and configuration of @einvoiceapi/mcp for AI assistants
- [Validation rules](https://einvoice-api.eu/docs/rules.md): one public page per rule; the docUrl of each finding

## API

- [OpenAPI 3.1 (JSON)](https://einvoice-api.eu/openapi.json): complete API description
- [OpenAPI 3.1 (YAML)](https://einvoice-api.eu/openapi.yaml): the same in YAML
- [API reference](https://einvoice-api-main-f5141d8.zuplo.site/api): interactive reference in the developer portal

## Optional

- [Rule index](https://einvoice-api.eu/rules/): one page per validation rule
- [Free web validator](https://einvoice-api.eu/en/e-invoice-validator/): 5 files a day, no account
- [Leitweg-ID checker](https://einvoice-api.eu/en/leitweg-id-checker/): check and calculate the check digit
- [Peppol ID and EAS schemes](https://einvoice-api.eu/en/peppol-id-eas-codes/): check an ID, choose a scheme
- [Unit codes](https://einvoice-api.eu/en/unit-codes-rec-20/): common UN/ECE codes, check any code
- [Test results](https://einvoice-api.eu/en/conformance/): dated result against the official test material
- [Rule changes](https://einvoice-api.eu/rules/changes/): what changed per rule-set release (Atom: https://einvoice-api.eu/rules/changes/feed.xml)
- [Licences and notices](https://einvoice-api.eu/licences/): owners and licences of the rule sets
- [All documents in one file](https://einvoice-api.eu/llms-full.txt)
- [Source on GitHub](https://github.com/einvoiceapi/einvoice-api): examples and MCP server