PDF/A-3
Create Factur-X
POST
/v1/create/facturx
Build a Factur-X PDF/A-3b invoice from structured JSON input.
REST API · v1
E-Invoicing API Tools
One REST API for every European e-invoicing standard: Factur-X, ZUGFeRD, XRechnung, UBL and CII. Production endpoints to create, validate, convert, render and extract invoices, each with a free in-browser tool and a full API reference.
Create
Build compliant e-invoices with PDF/A-3b conformance from structured data.
PDF/A-3
Create ZUGFeRD
POST
/v1/create/zugferd
Generate ZUGFeRD hybrid PDFs at all conformance levels.
CII
UBL
Create XRechnung
POST
/v1/create/xrechnung
Build XRechnung CII or UBL XML for German B2G submissions.
XML
Create UBL
POST
/v1/create/ubl
Generate EN 16931 compliant UBL invoice XML.
XML
Create CII
POST
/v1/create/cii
Generate UN/CEFACT Cross Industry Invoice XML.
PDF/A-3
Create Order-X
POST
/v1/create/order-x
Build an Order-X hybrid PDF/A-3 purchase order from structured JSON input.
XML
Create Cross-Industry Order
POST
/v1/create/cio
Generate a standalone UN/CEFACT Cross-Industry Order XML purchase order.
Validate
Validate invoices against official EN 16931 standards and Schematron rules.
JSON
Validate Factur-X
POST
/v1/validate/facturx
Validate Factur-X invoices against EN 16931 and Schematron rules.
JSON
Validate ZUGFeRD
POST
/v1/validate/zugferd
Verify ZUGFeRD PDF/A-3 hybrid invoices end-to-end.
JSON
Validate XRechnung
POST
/v1/validate/xrechnung
Run KoSIT validator rules against XRechnung documents.
JSON
Validate UBL
POST
/v1/validate/ubl
Validate UBL invoices against EN 16931 syntax binding.
JSON
Validate CII
POST
/v1/validate/cii
Validate Cross Industry Invoice XML against EN 16931.
JSON
Validate Order-X
POST
/v1/validate/order-x
Validate Order-X hybrid PDFs and Cross-Industry Order XML purchase orders.
Validation PDF report
Same validation, returned as a printable PDF compliance report instead of JSON. The pass/fail verdict comes back in the X-Invoice-Valid response header. One credit per call.
PDF
Factur-X PDF report
POST
/v1/validate/facturx/report
Validate Factur-X and get a printable PDF compliance report.
PDF
ZUGFeRD PDF report
POST
/v1/validate/zugferd/report
Validate ZUGFeRD hybrid PDFs and download a PDF report.
PDF
XRechnung PDF report
POST
/v1/validate/xrechnung/report
Run KoSIT validation and get a printable PDF report.
PDF
UBL PDF report
POST
/v1/validate/ubl/report
Validate UBL and get a printable PDF compliance report.
PDF
CII PDF report
POST
/v1/validate/cii/report
Validate CII XML and get a printable PDF compliance report.
PDF
Order-X PDF report
POST
/v1/validate/order-x/report
Validate an Order-X purchase order and get a printable PDF report.
Render
Generate visual PDF previews from structured e-invoicing XML formats.
PDF
Preview any invoice XML as PDF
POST
/v1/render/xml/to/pdf
Render CII, UBL or XRechnung as a readable PDF, with the format detected automatically.
PDF
Preview XRechnung as PDF
POST
/v1/render/xrechnung/to/pdf
Render a human-readable PDF visualization from XRechnung XML.
PDF
Preview UBL as PDF
POST
/v1/render/ubl/to/pdf
Generate styled PDF previews from UBL invoice XML.
PDF
Preview CII as PDF
POST
/v1/render/cii/to/pdf
Render UN/CEFACT CII XML invoices as visual PDFs.
Convert
Deterministic syntax conversion between all EN 16931 formats, Schematron-validated on the way out.
XML
Convert UBL to CII
POST
/v1/convert/ubl/to/cii
Transform UBL invoices into UN/CEFACT CII XML, ready for ZUGFeRD and Factur-X embedding.
XML
Convert CII to UBL
POST
/v1/convert/cii/to/ubl
Transform UN/CEFACT CII XML into Peppol-ready UBL invoices.
XML
Convert UBL to XRechnung
POST
/v1/convert/ubl/to/xrechnung
Promote EN 16931 UBL to the German B2G CIUS, KoSIT-validated for ZRE and OZG-RE.
XML
Convert CII to XRechnung
POST
/v1/convert/cii/to/xrechnung
Promote EN 16931 CII to the German B2G CIUS, KoSIT-validated for ZRE and OZG-RE.
XML
Convert XRechnung to UBL
POST
/v1/convert/xrechnung/to/ubl
Turn XRechnung into plain EN 16931 UBL for recipients outside the German public sector.
XML
Convert XRechnung to CII
POST
/v1/convert/xrechnung/to/cii
Turn XRechnung into plain EN 16931 CII XML.
PDF/A-3
Convert XRechnung to ZUGFeRD
POST
/v1/convert/xrechnung/to/zugferd
Turn machine-only XRechnung XML into a human-readable ZUGFeRD hybrid PDF/A-3.
PDF/A-3
Convert XRechnung to Factur-X
POST
/v1/convert/xrechnung/to/facturx
Turn XRechnung XML into a Factur-X hybrid PDF/A-3 with French XMP branding.
PDF/A-3
Convert UBL to ZUGFeRD
POST
/v1/convert/ubl/to/zugferd
Turn UBL XML into a ZUGFeRD hybrid PDF/A-3 with a readable invoice page.
PDF/A-3
Convert UBL to Factur-X
POST
/v1/convert/ubl/to/facturx
Turn UBL XML into a Factur-X hybrid PDF/A-3 with a readable invoice page.
PDF/A-3
Convert CII to ZUGFeRD
POST
/v1/convert/cii/to/zugferd
Turn CII XML into a ZUGFeRD hybrid PDF/A-3 with a readable invoice page.
PDF/A-3
Convert CII to Factur-X
POST
/v1/convert/cii/to/facturx
Turn CII XML into a Factur-X hybrid PDF/A-3 with a readable invoice page.
XML
Convert Factur-X to UBL
POST
/v1/convert/facturx/to/ubl
Read the invoice inside a Factur-X PDF and return it as UBL XML.
XML
Convert Factur-X to CII
POST
/v1/convert/facturx/to/cii
Read the invoice inside a Factur-X PDF and return it as standalone CII XML.
XML
Convert ZUGFeRD to UBL
POST
/v1/convert/zugferd/to/ubl
Read the invoice inside a ZUGFeRD PDF and return it as UBL XML.
XML
Convert ZUGFeRD to CII
POST
/v1/convert/zugferd/to/cii
Read the invoice inside a ZUGFeRD PDF and return it as standalone CII XML.
Extract & Embed
Read invoice data from PDFs and embed XML attachments into PDF/A-3. Not sure which route? The invoice extraction overview compares the three.
JSON
AI
Parse Invoice JSON
POST
/v1/parse/json
AI-powered structured JSON extraction from any invoice PDF, scanned or native.
JSON
Extract JSON from XML
POST
/v1/extract/json
Deterministic JSON parsing of embedded or standalone CII / UBL invoice XML.
XML
Extract XML from PDF
POST
/v1/extract/xml
Pull the embedded CII XML attachment out of Factur-X and ZUGFeRD PDFs.
ZIP
Extract Attachments
POST
/v1/extract/attachments
Download the embedded supporting documents (BG-24) of an XRechnung, Factur-X, ZUGFeRD, UBL, or CII e-invoice as a ZIP archive.
PDF/A-3
Embed XML as Factur-X
POST
/v1/embed/facturx
Combine a PDF and a CII XML into a Factur-X compliant PDF/A-3 with branded XMP metadata.
PDF/A-3
Embed XML as ZUGFeRD
POST
/v1/embed/zugferd
Combine a PDF and a CII XML into a ZUGFeRD compliant PDF/A-3 with branded XMP metadata.
Email Delivery
Create or embed an e-invoice and email it from your own domain, in one call.
Email
PDF/A-3
Create and email ZUGFeRD
POST
/v1/create/zugferd/email
Create a ZUGFeRD PDF/A-3 from JSON and email it from your own domain.
Email
PDF/A-3
Create and email Factur-X
POST
/v1/create/facturx/email
Create a Factur-X PDF/A-3 from JSON and email it from your own domain.
Email
XML
Create and email XRechnung
POST
/v1/create/xrechnung/email
Create an XRechnung from JSON and email the XML from your own domain.
Email
XML
Create and email UBL
POST
/v1/create/ubl/email
Create a UBL invoice from JSON and email the XML from your own domain.
Email
XML
Create and email CII
POST
/v1/create/cii/email
Create a CII invoice from JSON and email the XML from your own domain.
Email
PDF/A-3
Embed and email Factur-X
POST
/v1/embed/facturx/email
Embed your CII XML into your own PDF as Factur-X and email the result.
Email
PDF/A-3
Embed and email ZUGFeRD
POST
/v1/embed/zugferd/email
Embed your CII XML into your own PDF as ZUGFeRD and email the result.
Frequently Asked Questions
What e-invoicing standards does the API support?
The API supports Factur-X, ZUGFeRD, XRechnung, UBL, and UN/CEFACT CII , covering all major European e-invoicing standards required for B2B and B2G compliance.
Can I create and validate invoices with the same API?
Yes. The API provides dedicated endpoints for creating invoices from structured JSON, validating existing XML or PDF invoices against official rules, converting between formats, rendering PDF previews, and extracting invoice data.
How do I get started with the InvoiceXML API?
Sign up for a free account to receive an API key. No credit card is required. You can then authenticate requests with your key and start calling any endpoint immediately. The documentation covers request/response formats, code samples, and error handling.
Is the API suitable for high-volume invoice processing?
Yes. The API is built for production workloads with a 99.99% uptime SLA. Paid plans include higher rate limits and priority support. The 30-day free trial needs no credit card and is suitable for evaluating and building your integration.
Is data processed in Europe?
Yes. All data is processed on EU-based infrastructure and the service is fully GDPR compliant. Invoice data is never stored beyond the duration of a single API request.
Start free today
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Validate, convert and embed compliant e-invoices through one API. Start your 30-day free trial. No credit card required.
GDPR Compliant
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Setup in minutes
Peppol UBL
Factur-X
EN 16931
142 / 142 passed
Compliant
PDF/A-3 embedded