About Számlázz.hu MCP by usefulapi
A hosted MCP server for using Számlázz.hu from MCP clients. It supports invoice and receipt lookup as well as issuing, reversing and payment operations, and requires the Számla Agent add-on and an Agent key.
Key features
- 01Retrieve invoices and PDFs
- 02Retrieve receipts and taxpayer data
- 03Issue and reverse invoices
- 04Delete pro forma invoices
- 05Register invoice payments
- 06Create, reverse, and email receipts
Use cases
- 01Inspect an invoice or download its PDF
- 02Check Hungarian taxpayer details
- 03Record a payment on an invoice
- 04Issue or reverse an invoice or receipt
MCP support
Exposes Számlázz.hu invoice, receipt, taxpayer, and payment operations as tools for MCP clients through a hosted endpoint. Authentication uses OAuth and the user's Számlázz.hu credentials.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://szamlazz-hu.usefulapi.io/mcpclaude mcp add --transport http io-usefulapi-szamlazz-hu https://szamlazz-hu.usefulapi.io/mcp{"mcpServers":{"io-usefulapi-szamlazz-hu":{"type":"http","url":"https://szamlazz-hu.usefulapi.io/mcp"}}}Open in Cursor{"servers":{"io-usefulapi-szamlazz-hu":{"type":"http","url":"https://szamlazz-hu.usefulapi.io/mcp"}}}Open in VS Code{"mcpServers":{"io-usefulapi-szamlazz-hu":{"type":"http","url":"https://szamlazz-hu.usefulapi.io/mcp"}}}{"mcpServers":{"io-usefulapi-szamlazz-hu":{"serverUrl":"https://szamlazz-hu.usefulapi.io/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
11| Parameter | Type | Required | Description |
|---|---|---|---|
| external_id | string | No | The external id (szamlaKulsoAzon) given when the invoice was created. |
| order_number | string | No | The order number given when the invoice was created. |
| invoice_number | string | No | Invoice number, e.g. E-TST-2026-1. |
Details
From the project READMESzámlázz.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/mcpto log in. - VS Code: Add to VS Code.
- Cursor and other clients: add the URL as a remote MCP server:
{
"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
| Tool | Type | What it does |
|---|---|---|
szamlazz_get_invoice | read | Get an invoice |
szamlazz_get_invoice_pdf | read | Get the PDF of an invoice |
szamlazz_check_taxpayer | read | Check a Hungarian taxpayer |
szamlazz_get_receipt | read | Get a receipt |
szamlazz_create_invoice | write | Issue an invoice (fiscal, cannot be undone) |
szamlazz_reverse_invoice | write | Reverse (storno) an invoice (fiscal, cannot be undone) |
szamlazz_delete_proforma | write | Delete a pro forma invoice |
szamlazz_register_payment | write | Register payments on an invoice |
szamlazz_create_receipt | write | Issue a receipt (fiscal, cannot be undone) |
szamlazz_reverse_receipt | write | Reverse (storno) a receipt (fiscal, cannot be undone) |
szamlazz_send_receipt | write | E-mail a receipt |
szamlazz_usage_status | meta | Usage status (free-tier meter) |
szamlazz_request_feature | meta | Request a missing feature |
szamlazz_upgrade | meta | Upgrade to Pro (unlimited*) |
szamlazz_cancel_subscription | meta | Cancel 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
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 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.
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.