# BillOS API Reference

BillOS is a bookkeeping service registered with the Israel Tax Authority (רשות המסים) software registry. It issues legally valid Israeli tax documents (tax invoices, invoice/receipts, receipts, credit notes) with gapless numbering, digital signatures, an immutable audit trail, and the regulatory OPENFRMT (מבנה אחיד) export. Your app talks to it over a simple JSON HTTP API; BillOS takes care of the compliance.

**Base URL:** `https://api.billos.co.il/v1`

The original address, `/api/books/v1` on the PestOS API host, keeps answering forever: an integration connected against it never has to move. New integrations use the base URL above.

This document is the complete consumer reference. Every example is a runnable `curl`. And the [console](https://docs.billos.co.il/console) shows everything under your key (businesses, traffic, webhook deliveries) with the key itself as the sign-in.

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