einvoicing

A source-available invoice, quote, project and time-tracking app built with Laravel

phase4 - AS4 client and server for integration into existing systems. Specific support for Peppol and CEF eDelivery built-in.

API REST open source NestJS para facturacion electronica Ecuador SRI. Facturas, NC, ND, Retenciones, Guias de Remision. Firma XAdES-BES, Multi-tenant, BullMQ, Docker.

Java library for reading and writing UBL 2.0, 2.1, 2.2, 2.3, 2.4 and 2.5 documents

A generic Java AS2 library, servlet and server

A Node.js library for creating ZUGFeRD/Factur-X compliant documents. Generating XML and embedding it into PDF/A files, enabling seamless e-invoicing and digital document compliance.

Oxalis-NG (Oxalis - Next Generation) - Open-Source implementation of OpenPeppol AS4 profile

Advanced modules for the SILE typesetting system: A path for making books from front cover to back cover, invoices, and more, using lightweight markup.

A JavaScript library for creating and parsing electronic invoices compliant with the eInvoicing Directive, EN 16931, and popular extensions

Go KSeF 2.0 API Client library

ebInterface development repository for XSD and XSLT artifacts

Scribo — free, AI-native EN 16931-compliant e-invoicing. ZUGFeRD/XRechnung (Germany) and US plain PDF live; Factur-X, Facturae, Peppol BIS UBL coming soon. Available as MCP server, Claude/Codex skill, CLI, HTTP API, and web app.

Scribo MCP server — generate EN 16931-compliant e-invoices (ZUGFeRD, XRechnung, US plain PDF; Factur-X, Facturae, Peppol coming soon) from Claude, Cursor, Cline, ChatGPT & any MCP client. Free, hosted, no signup. Registry metadata, schemas & examples.

Scribo Claude/Codex skill — generate EN 16931-compliant e-invoices (ZUGFeRD, XRechnung, US plain PDF; Factur-X, Facturae, Peppol BIS UBL coming soon) via the public Scribo HTTP API

Scribo public HTTP API — documentation. Free EN 16931-compliant e-invoicing API (ZUGFeRD, XRechnung, US plain PDF; Factur-X, Facturae, Peppol BIS UBL coming soon).

Scribo CLI — the official npm package for generating EN 16931-compliant e-invoices (ZUGFeRD, XRechnung, plain US PDF) from the terminal and CI. Install: npm i -g @causaprima/scribo-cli

Usefull classes for PEPPOL programming in NET Core.

A Library containing all UBL types for C#NET Core. See PEPPOL

SP01 Middleware (eSeal Solution) is the simplest way to connect your business to Egyptian Tax Authority (ETA)

Reproducible EN16931 validation oracles — ConnectingEurope 1.3.16 fixtures, SVRL receipts, and mutants.