Szamlazz Invoicing

davepoon/szamlazz-invoicing

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.

1k tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

3248

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/davepoon/buildwithclaude --skill szamlazz-invoicing

The instruction itself

15 sections, as written by the author

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

How to use it

Copy the folder

Take davepoon/szamlazz-invoicing from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.

Install what it needs

The instructions reference pip. Without those the skill loads but fails at the first command.