Listed in the following categories:
E-Invoice
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NormAPI Costs

5.0 (1)
Validate, read and generate XRechnung and ZUGFeRD against the official KoSIT rule set. REST API, free validator, apps for Claude and ChatGPT. Hosted in the EU.

NormAPI Pricing

Last edited: November 2026
  • Validator
    Free
    Validate XRechnung and ZUGFeRD and read incoming e-invoices, no sign-up. A free account adds 50 generated invoices a month.
    Every rule violation explained in plain language
    Checked against the official KoSIT rule set
  • Starter
    19.00 €/ Month
    500 generated invoices a month, then a stop until month end or a one-click upgrade. 190 € paid yearly. Validation API for automated tests, email support.
    XRechnung (UBL, CII) and ZUGFeRD PDF from JSON
    Every invoice validated before delivery
    ZUGFeRD PDF on your own letterhead
  • Business
    49.00 €/ Month
    2,500 generated invoices a month, then a stop until month end or a one-click upgrade. 490 € paid yearly.
    Everything in Starter
    Priority support
  • Scale
    149.00 €/ Month
    10,000 generated invoices a month, then 0.02 € each up to a cap you set in your account. No stop in the middle of an invoice run. 1,490 € paid yearly.
    Everything in Business
    Cancel monthly, no contract
  • Volume
    599.00 €/ Month
    900,000 generated invoices a year on a 12-month term, then 0.01 € each. 5,990 € for the year paid in advance.
    Individual contract with SLA and DPA
    Price fixed for the term
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