szamlazz-invoicing

Apps & Automation

Issue, cancel, and fetch Hungarian invoices via the szamlazz.hu Agent API. Handles VAT calculation, NAV taxpayer lookup, partner caching, and PDF generation. Use when the user mentions számla, számlázás, invoice, sztornó, díjbekérő, proforma, or wants to bill a customer.

QUICK START

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Source SKILL.md: https://github.com/davepoon/buildwithclaude/blob/HEAD/plugins/all-skills/skills/szamlazz-invoicing/SKILL.md

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Szamlazz.hu Hungarian Invoicing

Issue, cancel (storno), download, and manage Hungarian invoices directly from Claude Code via the szamlazz.hu Agent API.

Built by SocialPro — a Hungarian AI automation and digital marketing agency specializing in custom AI integrations for SMEs.

When to Use This Skill

User wants to issue a Hungarian invoice (számla)
User wants to create a proforma / díjbekérő
User wants to cancel (storno) an existing invoice
User wants to download an invoice PDF
User wants to look up a Hungarian company by tax number (NAV)
User mentions szamlazz.hu, számlázás, or billing in a Hungarian context

Prerequisites

Plugin: socialpro-szamlazz installed
Python 3.9+ with PyYAML (pip install pyyaml)
szamlazz.hu account with an Agent API key (generate at szamlazz.hu → Beállítások → Számla Agent kulcsok)

Installation

/plugin marketplace add socialproKGCMG/socialpro-plugins
/plugin install szamlazz@socialpro-plugins

What This Skill Does

First-run setup — detects missing config, asks 3 questions (API key, seller tax number with NAV auto-lookup, bank account with auto-detection), writes seller.yaml
Invoice creation — parses natural language, resolves customer from partner cache or NAV, calculates net/VAT/gross with Decimal precision, shows mandatory confirmation, fires XML to API, saves PDF
Storno — cancels an existing invoice by number
Proforma — creates a díjbekérő (proforma invoice)
PDF download — re-downloads an invoice PDF by number
NAV lookup — queries the National Tax Authority for company data by tax number

How to Use

Issue an Invoice

/szamlazz állíts ki egy számlát Példa Kft.-nek 150 000 Ft-ról webfejlesztésről

Cancel (Storno)

/szamlazz sztornózd a SOC-2026-0042 számlát

Proforma / Díjbekérő

/szamlazz díjbekérő Acme Ltd-nek 500 EUR-ról konzultációért

Download PDF

/szamlazz töltsd le a SOC-2026-0042 PDF-jét

NAV Taxpayer Lookup

/szamlazz ki ez a cég: 12345678-2-42

Key Features

Feature	Details
Invoice types	Regular, proforma (díjbekérő), storno
VAT rates	27% / 18% / 5% / 0% / AAM + KATA support
NAV lookup	Auto-fetches company name and address from tax number
Partner cache	Customers remembered by tax ID in local `partners.yaml`
Cross-platform	macOS, Linux, Windows
Rounding	`Decimal` with `ROUND_HALF_UP` to 2 decimals
Error handling	7 most common szamlazz.hu errors translated with recovery steps
Security	API key in OS credential store, never echoed to stdout

Error Codes

Code	Meaning	Fix
3	Auth failed	Regenerate Agent key at szamlazz.hu
54, 55	e-Számla cert	Retry with `eszamla=false`
57, 259-264	Calculation mismatch	Recalculate with Decimal rounding
136	Unpaid balance	Pay szamlazz.hu subscription

Tips

The plugin activates on both Hungarian and English trigger words
Invoices are legal documents — the skill always shows a confirmation before issuing
Partner cache is local-only and never committed to git
For foreign currency invoices, set penznem and the MNB exchange rate is used automatically
Maximum 5 retry attempts per session to prevent infinite loops