Számlázz.hu MCP by usefulapi

io.usefulapiPublished by usefulapi.ioOfficial publisherv1.23.5Updated Nov 8, 2026

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

The publisher's own server: Ably MCP by usefulapi

VerifiedStreamable HTTPWeb executableFinanceBusiness & Commerce

Overview

Számlázz.hu MCP by usefulapi's hosted MCP server (szamlazz-hu.usefulapi.io), published by usefulapi.io; no sign-in required; Streamable HTTP; 11 tools.

No AI overview yet: these facts come from the registry entry and the server itself.

Publisher
usefulapi.io
Endpoint
szamlazz-hu.usefulapi.io
Last checked

Installation

In SourceWeft

  1. Open Számlázz.hu MCP by usefulapi in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.usefulapi%2Fszamlazz-hu/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "sz-ml-zz-hu-by-usefulapi": {
      "type": "http",
      "url": "https://szamlazz-hu.usefulapi.io/mcp"
    }
  }
}

README

Számlázz.hu MCP by usefulapi

Use Számlázz.hu through the Számla Agent API from Claude, Cursor, or any MCP client — get invoices and their PDFs, receipts and taxpayer data, plus issuing and reversing invoices, deleting pro formas, registering payments, and creating, reversing and sending receipts. Needs the Számla Agent add-on and an Agent key. Hosted, no local install: connect with your own Számlázz.hu credentials.

Live endpoint: https://szamlazz-hu.usefulapi.io/mcp · Homepage: https://usefulapi.io/szamlazz-hu

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://szamlazz-hu.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http szamlazz-hu https://szamlazz-hu.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
json
{  "mcpServers": {    "szamlazz-hu": {      "url": "https://szamlazz-hu.usefulapi.io/mcp"    }  }}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Számlázz.hu credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/szamlazz-hu/

Tools

ToolTypeWhat it does
szamlazz_get_invoicereadGet an invoice
szamlazz_get_invoice_pdfreadGet the PDF of an invoice
szamlazz_check_taxpayerreadCheck a Hungarian taxpayer
szamlazz_get_receiptreadGet a receipt
szamlazz_create_invoicewriteIssue an invoice (fiscal, cannot be undone)
szamlazz_reverse_invoicewriteReverse (storno) an invoice (fiscal, cannot be undone)
szamlazz_delete_proformawriteDelete a pro forma invoice
szamlazz_register_paymentwriteRegister payments on an invoice
szamlazz_create_receiptwriteIssue a receipt (fiscal, cannot be undone)
szamlazz_reverse_receiptwriteReverse (storno) a receipt (fiscal, cannot be undone)
szamlazz_send_receiptwriteE-mail a receipt
szamlazz_usage_statusmetaUsage status (free-tier meter)
szamlazz_request_featuremetaRequest a missing feature
szamlazz_upgrademetaUpgrade to Pro or Pro+
szamlazz_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro (per Agent key)$9/mo or $90/yr (2 months free)Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with szamlazz_upgrade (it returns a Stripe Checkout link). Cancel any time with szamlazz_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running szamlazz_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT © usefulapi. Not affiliated with or endorsed by Számlázz.hu.

Source: servers/szamlazz-hu/README.md at commit 4046075

Tools

11

szamlazz_get_invoice

Get an invoice

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 check whether an invoice exists before issuing again. Számla Agent action-szamla_agent_xml.

Parametersexternal_idorder_numberinvoice_number

szamlazz_get_invoice_pdf

Get the PDF of an invoice

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.

Parametersexternal_idorder_numberinvoice_number

szamlazz_check_taxpayer

Check a Hungarian taxpayer

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).

Parameterstax_numberrequired

szamlazz_get_receipt

Get a receipt

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.

Parameterspdfreceipt_numberrequired

szamlazz_create_invoice

Issue an invoice (fiscal, cannot be undone)

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 (előlegszámla). The tool computes net, VAT and gross of every line from net_unit_price and vat_rate. preview true builds the PDF only and creates NO document (check the reply: a returned invoice_number means a document WAS created). This call is NEVER retried: if the result is unclear, look the invoice up (szamlazz_get_invoice by order_number or external_id) before issuing again; always send external_id or order_number so that you can. Setting send_email_to_buyer e-mails the PDF to the buyer. Számla Agent action-xmlagentxmlfile.

Parameterskindpaidlinesrequiredprefixcommentpreviewcurrencydue_daterequiredlanguagee_invoicebuyer_cityrequiredbuyer_namerequired+19 more

szamlazz_reverse_invoice

Reverse (storno) an invoice (fiscal, cannot be undone)

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. Számla Agent action-szamla_agent_st.

Parametersreasone_invoiceissue_dateinvoice_numberrequired

szamlazz_delete_proforma

Delete a pro forma invoice

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.

Parametersorder_numberinvoice_number

szamlazz_register_payment

Register payments on an invoice

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 Agent action-szamla_agent_kifiz.

Parameterscurrencyrequiredpaymentsrequiredinvoice_numberrequiredreplace_existing

szamlazz_create_receipt

Issue a receipt (fiscal, cannot be undone)

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 receipt prefix must be a receipt-only prefix (capital letters and digits, e.g. NYGTA), not an invoice prefix. call_id is required: the vendor refuses a second receipt with the same call_id (error 338), which protects against a duplicate. NEVER retried automatically: if the result is unclear, ask the user, then repeat the call with the SAME call_id (error 338 means the receipt already exists; find it in Számlázz.hu). Számla Agent action-szamla_agent_nyugta_create.

Parameterslinesrequiredprefixrequiredcall_idrequiredcommentorder_numberpayment_methodrequired

szamlazz_reverse_receipt

Reverse (storno) a receipt (fiscal, cannot be undone)

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_nyugta_storno.

Parameterscall_idreceipt_numberrequired

szamlazz_send_receipt

E-mail a receipt

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.

Parametersbodyemailsubjectreply_toreceipt_numberrequired

Version history

20
  1. v1.23.5LatestNov 8, 2026
  2. v1.23.4Nov 7, 2026
  3. v1.22.3Nov 5, 2026
  4. v1.22.2Nov 5, 2026
  5. v1.22.1Nov 4, 2026
  6. v1.22.0Nov 3, 2026
  7. v1.21.1Nov 3, 2026
  8. v1.20.0Nov 1, 2026
  9. v1.18.0Oct 31, 2026
  10. v1.17.0Oct 31, 2026
  11. v1.16.2Oct 30, 2026
  12. v1.16.0Oct 30, 2026
  13. v1.11.0Oct 26, 2026
  14. v1.8.3Oct 25, 2026
  15. v1.8.0Oct 25, 2026
  16. v1.7.0Oct 24, 2026
  17. v1.4.0Oct 23, 2026
  18. v1.3.4Oct 22, 2026
  19. v1.3.3Oct 21, 2026
  20. v1.0.0Oct 12, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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