hungary-invoice

Let AI agents report Hungarian invoice data to NAV Online Szamla 3.0 (szamla adatszolgaltatas).

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What it can do

  • Submit Invoice: Report a Hungary invoice to NAV Online Számla 3.0 (számla adatszolgáltatás) — the national invoice-data reporting API of the Hungarian tax authority (NAV). This is REPORTING, not issui
  • Query Transaction: Check the NAV processing status of an invoice-data submission by its transactionId (returned by submit_invoice). Status values (per invoice index): RECEIVED (NAV received it), PROCE

What data it sees

Do you need an account

No: the server works without sign-in

Let AI agents report Hungarian invoice data to NAV Online Szamla 3.0 (szamla adatszolgaltatas). Stateless remote MCP server: bring your own technical-user values, signatures computed per request, nothing stored. Submit invoice data with AFA math (27/18/5%), query transaction status.

How to connect

How to connect hungary-invoice to Claude

The server address to paste into Claude settings:

https://hungary-invoice--wishpool.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect hungary-invoice to ChatGPT

The server address to paste into ChatGPT settings:

https://hungary-invoice--wishpool.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect hungary-invoice to Cursor

The server address to paste into Cursor settings:

https://hungary-invoice--wishpool.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (2)

Raw names from tools/list. Only developers need these.

submit_invoiceReport a Hungary invoice to NAV Online Számla 3.0 (számla adatszolgáltatás) — the national invoice-data reporting API of the Hungarian tax authority (NAV). This is REPORTING, not issuing: the merchant issues the actual invoice to the buyer; this tool submits the invoice data to NAV as legally required and returns a transactionId. Bring your own technical-user credentials via headers, all self-minted in the Online Számla web portal (onlineszamla.nav.gov.hu -> Technical users): x-nav-login, x-nav-password, x-nav-signkey, x-nav-exchangekey, x-nav-taxnumber (your 8-digit tax number). Runs against the NAV TEST environment by default (no legal effect); set header x-nav-mode: prod to report real invoices. The server exchanges a token, builds the InvoiceData XML, signs the request (SHA3-512), submits a CREATE operation, and returns the transactionId — then call query_transaction to read the processing result. Amounts are in HUF; each line carries a NET unit price and a Hungarian ÁFA (VAT) rate (27, 18, 5, or 0) — the server computes per-rate net/VAT and the invoice gross total.
query_transactionCheck the NAV processing status of an invoice-data submission by its transactionId (returned by submit_invoice). Status values (per invoice index): RECEIVED (NAV received it), PROCESSING (validating), SAVED (stored — non-fatal warnings possible), DONE (successfully processed and stored — this is the success terminal), ABORTED (rejected — read validation_messages for the reason). Authenticates with your technical-user keys; safe to call anytime.