MCP server

Számlázz.hu MCP by usefulapi

io.usefulapi/szamlazz-hu

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Read Számlázz.hu invoices, PDFs, receipts, taxpayers; issue, reverse and pay invoices and receipts.

Working at last checkVerified publisher: usefulapi.ioAbout 4,752 tokens per request once connected11 tools

Website Source

https://szamlazz-hu.usefulapi.io/mcp

At a glance

Type: MCP server
Publisher: usefulapi.io (verified by the MCP Registry)
Status: Working at last check
Tools: 11
Token cost: About 4,752 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http szamlazz-hu https://szamlazz-hu.usefulapi.io/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.szamlazz-hu]
url = "https://szamlazz-hu.usefulapi.io/mcp"

Gemini CLI

{"mcpServers":{"szamlazz-hu":{"httpUrl":"https://szamlazz-hu.usefulapi.io/mcp"}}}

Cursor

{"mcpServers":{"szamlazz-hu":{"url":"https://szamlazz-hu.usefulapi.io/mcp"}}}

VS Code

{"servers":{"szamlazz-hu":{"type":"http","url":"https://szamlazz-hu.usefulapi.io/mcp"}}}

Antigravity

agy mcp add szamlazz-hu https://szamlazz-hu.usefulapi.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"szamlazz-hu","server_url":"https://szamlazz-hu.usefulapi.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"szamlazz-hu","server_url":"https://szamlazz-hu.usefulapi.io/mcp"}

Tools

szamlazz_check_taxpayer ~166 tokens
Look up a Hungarian taxpayer in the NAV register by the first 8 digits of the tax number (the törzsszám): whether the number is valid, the taxpayer's name, VAT status and addresses. Számla Agent action-szamla_agent_taxpayer (data from the NAV Online Invoice platform).
szamlazz_create_invoice Moves money · ~1715 tokens
ISSUES a real invoice in Számlázz.hu. A final invoice is reported to NAV (Online Számla) and can only be cancelled by a reversal (szamlazz_reverse_invoice), never deleted. kind: invoice (default), proforma (díjbekérő; not fiscal, can be deleted with szamlazz_delete_proforma), prepayment (előlegszáml
szamlazz_create_receipt ~787 tokens
ISSUES a real HUF receipt (nyugta). Receipts are fiscal (NAV reporting) and can only be cancelled by szamlazz_reverse_receipt, never deleted. Give each line's whole-forint gross_total and vat_rate: the tool derives net, VAT and unit price (net + VAT equals gross exactly, as the vendor demands). The
szamlazz_delete_proforma Deletes data · ~194 tokens
DELETES one pro forma invoice (díjbekérő) by its number or by its order number (give exactly one). Only pro forma invoices can be deleted; a real invoice is never touched (use szamlazz_reverse_invoice). Cannot be undone. Számla Agent action-szamla_agent_dijbekero_torlese.
szamlazz_get_invoice ~268 tokens
Read the data of one issued invoice (seller, buyer, lines, totals, VAT breakdown, payments) by invoice number, order number or your external id (give exactly one; for an order number with several invoices the last one is returned). Only invoices issued in this Számlázz.hu account. Also use it to che
szamlazz_get_invoice_pdf ~220 tokens
Download the PDF of one issued document (invoice, pro forma, ...) by invoice number, order number or your external id (give exactly one). Returns the totals and the PDF as an embedded resource. Számla Agent action-szamla_agent_pdf.
szamlazz_get_receipt ~158 tokens
Read one issued receipt (nyugta) by receipt number: lines, payments, totals, whether it was reversed. Optionally the PDF. Számla Agent action-szamla_agent_nyugta_get.
szamlazz_register_payment ~489 tokens
Records 1-5 payments (kifizetés) on one of your own issued invoices or pro forma invoices, which updates its paid amount and outstanding balance. By default the payments are ADDED to the existing ones; replace_existing true REPLACES all earlier payment entries of the invoice. Not fiscal. Számla Agen
szamlazz_reverse_invoice ~272 tokens
ISSUES a reversal (storno) invoice that cancels one issued invoice. Fiscal: it is reported to NAV and cannot be undone; the original stays in the books. A reversal needs the invoice number of a real invoice. NEVER retried: if the result is unclear, check with szamlazz_get_invoice before trying again
szamlazz_reverse_receipt ~208 tokens
ISSUES a reversal (storno) receipt that cancels one issued receipt. Fiscal and irreversible; a receipt can be reversed once, and a reversal receipt cannot be reversed. NEVER retried: if the result is unclear, check with szamlazz_get_receipt before trying again. Számla Agent action-szamla_agent_nyugt
szamlazz_send_receipt Sends messages · ~275 tokens
E-MAILS an already issued receipt (PDF) to a customer. Without the e-mail fields, the vendor re-sends the receipt with the settings of the earlier e-mail. The e-mail cannot be recalled. Számla Agent action-szamla_agent_nyugta_send.

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