Invoice-api.xhub is a REST API for generating, validating, and archiving compliant e-invoices (XRechnung, ZUGFeRD, Peppol) across 28 countries. See features,…
Invoice-api.xhub is a developer-first REST API for electronic invoicing compliance, built by BeeBack UG. Instead of hand-rolling XML workflows for country-specific e-invoice mandates, developers send a JSON request and the API returns a compliant invoice in the required format. The platform supports generation, parsing, validation (including KoSIT schema validation for German formats), and format conversion across major European e-invoice standards including XRechnung, ZUGFeRD, Factur-X, FatturaPA, and Peppol UBL, with coverage cited across 28 countries and 12+ invoice formats. It also offers GoBD-compliant long-term archiving with 10-year retention and direct distribution through the Peppol network. Pre-built integrations connect the API to e-commerce platforms (Shopify, WooCommerce, Shopware, JTL-Shop, Magento, PrestaShop) and automation tools (n8n, Zapier, Make, Airtable, HubSpot), with a documented n8n template library for workflows like archiving inbound invoices or generating an XRechnung from a spreadsheet row. The product is aimed at developers and businesses in the EU (especially Germany) that need to meet e-invoicing regulatory mandates without building compliance logic in-house, and offers a free tier for testing plus paid usage-based plans with a live API playground and dashboard.
Key Features
Invoice Creator API — Generate compliant e-invoices in XRechnung, ZUGFeRD, Factur-X, FatturaPA, and Peppol UBL formats from a single JSON request.
Validator API — Validate e-invoices against KoSIT and other national schemas to confirm regulatory compliance before submission.
Parser API — Extract structured data from existing e-invoices for downstream processing or reconciliation.
Format Converter — Convert invoices between supported e-invoice formats (e.g. ZUGFeRD to XRechnung) via the Converter endpoint.
Visualizer — Render e-invoices as human-readable PDF or HTML documents for review and customer delivery.
GoBD-Compliant Archiving — Long-term invoice archiving with 10-year retention, built to meet German GoBD recordkeeping requirements.
Peppol Gateway — Send and receive e-invoices directly over the Peppol network for cross-border B2G/B2B distribution.
E-Commerce Integrations — Pre-built connectors for Shopify, WooCommerce, Shopware, Magento, PrestaShop, and JTL-Shop automatically generate compliant invoices for orders.
Automation Platform Integrations — Native support for n8n (with ready-made workflow templates), Zapier, Make, Airtable, and HubSpot for invoice automation without custom code.
Webhooks & Dashboard — Real-time webhooks and an account dashboard (Starter+) for monitoring API usage, invoices, and account activity.
Pros & Cons
Pros
Covers a wide range of EU e-invoice formats (XRechnung, ZUGFeRD, Factur-X, FatturaPA, Peppol) from a single API
Free tier with no credit card required, plus a live API playground for testing before committing
Pre-built integrations for major shop platforms (Shopify, WooCommerce, Shopware, Magento, PrestaShop, JTL-Shop) and automation tools (n8n, Zapier, Make, Airtable, HubSpot)
Includes GoBD-compliant archiving with 10-year retention, addressing a compliance need many teams would otherwise build separately
Transparent, published self-serve pricing with a 14-day trial on paid tiers
Cons
Free tier is limited to 20 API calls total, which only covers basic evaluation, not real usage
Paid tiers are metered by API call volume, so cost can scale quickly for high-volume invoicing
Site content is presented primarily in German with an English toggle, and depth of English documentation may lag the German version
As a developer API rather than an end-user application, it requires engineering effort to integrate rather than being usable out of the box by non-technical teams