Invoices Documentation
Learn how to validate, send, and receive e-invoices with the Postscale Invoices API. XRechnung, ZUGFeRD, and EN 16931 compliance made simple.
Getting Started with Postscale Invoices
Overview of Postscale Invoices, prerequisites, and your first validation API call.
Validation API Reference
POST /v1/invoices/validate — request format, response schema, error codes, and usage examples.
Inbound Invoice Processing
How Postscale detects e-invoices in incoming email, extracts structured data, and delivers it via webhooks.
Sending E-Invoices
POST /v1/invoices/send — generate compliant XRechnung invoices from JSON and deliver them via email.
XRechnung & EN 16931 Reference
E-invoicing formats, field mapping, Leitweg-ID, and compliance notes for XRechnung, ZUGFeRD, and EN 16931.