Audience
Software teams and SaaS vendors that issue or check German e-invoices (XRechnung, ZUGFeRD)
About NormAPI
NormAPI is an e-invoicing API for software teams that issue or check German e-invoices in the XRechnung and ZUGFeRD formats.
It has two endpoints. Validation checks an invoice (UBL, CII or ZUGFeRD PDF) against the official KoSIT rule set and returns every finding as JSON, with its rule code, severity and location in the document. Generation turns invoice data sent as JSON into a validated XRechnung (UBL or CII) or ZUGFeRD PDF. Rule-set updates are included: KoSIT publishes a new version roughly every six months, and the version in force is reported with every result. A TypeScript client is available on npm.
The same validation runs in a free browser validator that needs no sign-up and never stores invoice content, and 137 of the 307 rules have a plain-language reference page explaining what they mean and how to fix them.
Validation is free. Generation costs EUR 49 a month for 500 invoices or EUR 149 for 2,500, and an account includes 25 generated invoices a month for free.
Other Popular Alternatives & Related Software
E‑Rechnungs-Studio
E-Rechnungs-Studio is a German web app for creating, converting, validating and viewing electronic invoices.
Users can upload an existing invoice PDF and convert it into an EN 16931-compatible e-invoice, including XRechnung and ZUGFeRD. The tool also includes an online validator for XRechnung XML files and ZUGFeRD PDFs, plus a viewer that makes structured invoice data readable.
It is designed for small businesses, freelancers, agencies, service providers and companies in Germany that need to handle individual e-invoices without installing full accounting software.
Core functions include PDF to XRechnung conversion, PDF to ZUGFeRD conversion, XRechnung validation, ZUGFeRD validation and readable e-invoice viewing.
Learn more about E‑Rechnungs-Studio
Coretool
Coretool is a browser-based invoicing application for German businesses, freelancers, sole traders, tradespeople, and small service businesses. Users can create and manage quotes and invoices, including XRechnung and ZUGFeRD e-invoices, track customers, send payment reminders, and organize appointments. The app supports GiroCode QR codes, digital quote signatures, and validation of e-invoice documents through its REST API. API-based workflows can connect with automation tools such as Make, Zapier, and n8n; availability of some platform-specific modules may depend on approval. Calendar feeds can be added to Google, Apple, or Outlook calendars. The optional Kalkulations-Assistent supports project estimates, material and labor calculations, and quote creation. Coretool runs in a web browser without local installation. Its free plan allows three invoices per month; Solo costs €9/month plus VAT and can be canceled monthly.
Learn more about Coretool
rechnungswandler.de
rechnungswandler.de is a browser-based e-invoicing tool for freelancers and small businesses, particularly in Germany. It converts invoice data entered in a form or extracted from PDF, Word, Excel and scanned PDF files into XRechnung or ZUGFeRD documents aligned with EN 16931. Users can review extracted fields and download the completed invoice; a viewer also opens and checks received e-invoices. Conversion and viewing run locally in the browser, so invoice files are not uploaded for these operations. Pro features include retaining the original document layout, batch conversion, saved customer details, reusable templates, payment reminders and validation reports. Optional AI assistance can suggest missing fields. Users can create invoices in the web form or adapt existing invoice files without installing desktop software. A free tier with usage limits and paid 24-hour, monthly and annual plans are available.
Learn more about rechnungswandler.de
Storecove
Send & receive e-invoices with PEPPOL. Safely send to international governments. For ERP: Connect your software to Peppol with an easy RESTful API.
Why E-invoicing?
- The costs of sending e-invoices is 59% cheaper and receiving costs are reduced by 64%.
- Paper invoicing requires paper filing, retention and storage space, which costs time and money. E-invoices are send from bookkeeping system to bookkeeping system, fully in the cloud without physical interference.
- You can no longer send PDF or paper invoices to governments, ministries or public entities. With Peppol you can send your e-invoices to governments worldwide, all according to the newly established European Directive.
Are you an ERP system / accounting software? You can enable e-invoicing for your own customers using an easy RESTful API. Customers can then send & receive e-invoices from within your own software, easily connect to the Peppol network and send e-invoices to government
Learn more about Storecove
Pricing
Starting Price:
€49 per month
Free Version:
Free Version available.
Integrations
API:
Yes, NormAPI offers API access
No integrations listed.
Company Information
NormAPI
normapi.de
Videos and Screen Captures
Other Useful Business Software
Paessler: Easy to Use With Enterprise Power. Free Trial
You shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
Product Details
Platforms Supported
Cloud
Training
Documentation
Support
Online
NormAPI Frequently Asked Questions
Q: What kinds of users and organization types does NormAPI work with?
NormAPI works with these users and organization types: Mid Size Business, Small Business, Enterprise, Freelance, Nonprofit, Government, and Startup.
Q: What languages does NormAPI support in their product?
NormAPI supports these languages: English and German.
Q: What kind of support options does NormAPI offer?
NormAPI offers support via online.
Q: Does NormAPI have an API?
Yes, NormAPI has an API.
Q: What type of training does NormAPI provide?
NormAPI provides training in the form of documentation.
Q: How much does NormAPI cost?
Pricing for NormAPI starts at €49 per month.
