Free plugin connecting WooCommerce to invoice-api.xhub.io for compliant e-invoices (XRechnung, ZUGFeRD, PDF) per EU mandates.

devxhubio

<p>This is a <strong>free</strong> plugin that connects WooCommerce to the <a href="https://invoice-api.xhub.io" rel="nofollow ugc">invoice-api.xhub.io</a> e-invoicing service. The plugin itself is fully open source under GPLv2-or-later. To generate invoices you need an active subscription with invoice-api.xhub.io — service plans start at modest monthly tiers, see <a href="https://console.invoice-api.xhub.io" rel="nofollow ugc">console.invoice-api.xhub.io</a> for current pricing.</p>
<p>This is the same model used by Stripe, PayPal, Mollie, Mailchimp, and Zapier WordPress plugins: free open-source connector + paid third-party service.</p>
<p>It targets the EU e-invoicing mandates rolling out between 2025 and 2028 — Germany (XRechnung/ZUGFeRD, mandatory B2B receive 2025, send 2027/28), France (Factur-X, mandatory 2026/27), Italy (FatturaPA, mandatory since 2019), and 11 more countries.</p>
<h4>Supported formats (live now)</h4>
<ul>
<li>PDF (all 14 countries)</li>
<li>XRechnung (DE)</li>
<li>ZUGFeRD (DE, AT)</li>
</ul>
<h4>Coming Q3 2026</h4>
<p>The invoice-api.xhub.io API roadmap adds these formats from Q3 2026 onwards. The plugin will surface them in the format dropdown automatically once the backend supports generation:</p>
<ul>
<li>Factur-X (FR)</li>
<li>FatturaPA (IT)</li>
<li>Facturae (ES)</li>
<li>ebInterface (AT)</li>
<li>UBL (BE, NL, BG, RO)</li>
<li>ISDOC (CZ)</li>
<li>NAV (HU)</li>
</ul>
<p>In the meantime PDF works for all 14 countries — that’s the universal fallback while the country-specific formats roll out.</p>
<h4>How it works</h4>
<ol>
<li>You install the plugin and add your invoice-api.xhub.io API key.</li>
<li>You configure the default country, format, and seller details.</li>
<li>When an order reaches the configured trigger (default: completed), the plugin POSTs the order to the API and stores the returned invoice file on the order.</li>
<li>The customer-facing email gets the invoice file attached automatically (configurable).</li>
<li>The order edit screen has a meta box to manually generate, re-generate, and download the invoice.</li>
</ol>
<h4>What this plugin does NOT do</h4>
<ul>
<li>It does not host an OCR or template engine — generation is delegated to the API.</li>
<li>It does not bypass WooCommerce taxes — tax rates are derived from line totals as WooCommerce computes them.</li>
<li>It does not submit invoices to government portals (Peppol, FatturaPA SDI, KSeF). The XML/PDF is produced on the server and stored on the order; submission is your responsibility.</li>
<li>It does not work without an API key — sign up at https://invoice-api.xhub.io to obtain one.</li>
</ul>
<h4>External services</h4>
<p>This plugin relies on the third-party service <strong>invoice-api.xhub.io</strong> to generate the invoice files (XRechnung XML, ZUGFeRD PDF, Factur-X PDF, etc.). It is required for the plugin to function — invoice generation cannot happen locally because the service produces standards-compliant e-invoices using server-side libraries that are not bundled with this plugin.</p>
<p><strong>Endpoint:</strong> <code>https://service.invoice-api.xhub.io/api/v1/invoice/{country}/{format}/generate</code></p>
<p><strong>What is sent:</strong> for every order processed (auto on a status transition you configure, or manually via the meta box):</p>
<ul>
<li>Seller information from your plugin settings: company name, VAT ID, street, postal code, city, country, email, IBAN, BIC (if configured)</li>
<li>Buyer information from the order’s billing address: name (or company), street, city, postal code, country code, email</li>
<li>Order line items: description, quantity, unit price, tax rate, tax category, net/tax/gross amounts</li>
<li>Order metadata: invoice number, dates, currency, payment terms, country-specific fields (e.g. Leitweg-ID for DE)</li>
</ul>
<p><strong>What is NOT sent:</strong> WordPress user accounts, password hashes, payment-gateway credentials, server logs, plugin/theme lists.</p>
<p><strong>When data is sent:</strong> only after you have configured an API key (no calls happen on activation or before configuration), and only at one of: (a) the configured order status transition, (b) when you click “Generate” / “Re-generate invoice” in the order meta box.</p>
<p><strong>Service provider:</strong> xhub.io — see the Privacy / GDPR section below for the full data-flow description.</p>
<p>By configuring your API key and saving the plugin settings, you consent to this data being transmitted to invoice-api.xhub.io for the sole purpose of generating compliant e-invoices.</p>
<h4>Privacy / GDPR</h4>
<p>The plugin stores the generated invoice file (base64-encoded) and metadata on the WooCommerce order itself, using order custom fields prefixed with <code>_invoice_api_xhub_</code>. This includes the buyer’s billing details that are part of the invoice payload and will appear in the generated XML/PDF.</p>
<p>When a WordPress administrator processes a personal-data export request (Tools <span aria-hidden="true" class="wp-exclude-emoji">→</span> Export Personal Data), the plugin contributes the invoice number, generation timestamp, format, and filename for each order belonging to the requested email address.</p>
<p>When a personal-data erasure request is processed, the plugin deletes the stored invoice payload and all associated metadata for orders belonging to the requested email address.</p>


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