Read and create Vyfakturuj invoices and contacts: search, number series, payment methods, tags. Hosted by usefulapi — connect from Claude, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"vyfakturuj": {
"url": "https://vyfakturuj.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"vyfakturuj": {
"type": "http",
"url": "https://vyfakturuj.usefulapi.io/mcp"
}
}
}Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
The login page asks for your Vyfakturuj login e-mail and Vyfakturuj API key.
Create the key in Vyfakturuj under Nastavení → Propojení s dalšími systémy → API a webhook (app.vyfakturuj.cz/nastaveni/propojeni/api). Use the API key, not your account password. The API is part of the Ideal and Profi plans, and every call counts against your plan's monthly API request limit. Your key is used only to call the Vyfakturuj API on your behalf; it is never shown to anyone.
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: the login page asks for your Vyfakturuj login e-mail and Vyfakturuj API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
| Tool | Type | What it does |
|---|---|---|
vyfakturuj_list_invoices | read | List invoices Search documents (faktury, zalohove faktury, proformy, objednavky ...); pass sort=date_created~desc for the newest first. Each row has id, number, type, dates, customer, VS, currency, total, flags and flags_decoded (paid, sent_to_customer, cancelled, ...) and the public/PDF URLs; use vyfakturuj_get_invoice for the whole document with items. Filter by free text q, customer id, document type, number, variable symbol (VS), currency or creation date range. Paged with rows_limit/rows_offset. GET /invoice/. |
vyfakturuj_get_invoice | read | Get an invoice One document with all fields: supplier and customer blocks, items (text, quantity, unit_price, vat_rate, totals), dates, VS, bank details, total, flags and flags_decoded, payment method, public page, PDF and online-payment URLs. GET /invoice/{id}/. |
vyfakturuj_create_invoice | write | Create an invoice (issues a real numbered document) WRITE. Creates a document in Vyfakturuj. Vyfakturuj has NO draft state: the document is issued at once and takes the next number of its number series (delete or cancel it in Vyfakturuj if wrong). Does NOT send an e-mail to the customer, does NOT mark it paid and moves no money; automatic reminders and paid notices are switched off for it (disable_automated_mails). Name the customer with id_customer (an address-book contact, from vyfakturuj_list_contacts) or with the customer_* fields. Items need text and unit_price. Optional id_number_series / id_payment_method come from vyfakturuj_list_number_series / vyfakturuj_list_payment_methods; the account defaults apply otherwise. Prices are net unless calculate_vat is 2 (gross). POST /invoice/. |
vyfakturuj_list_contacts | read | List contacts Search the address book (adresar): id, name, company, ICO (IC), DIC, address, e-mail (mail_to), phone, default days_due. Filter by free text q, ICO, DIC, name, e-mail or phone. Paged with rows_limit/rows_offset. GET /contact/. |
vyfakturuj_get_contact | read | Get a contact One address-book contact with every field (billing and delivery address, ICO/DIC, e-mails, default texts and days_due). GET /contact/{id}/. |
vyfakturuj_create_contact | write | Create a contact WRITE. Adds a contact to the address book (it is not a customer message: nothing is sent). Give at least a name (the address-book label) or company or last name. Returns the new contact with its id. POST /contact/. |
vyfakturuj_get_template | read | Get a recurring-invoice template One template / recurring invoice (sablona, pravidelna faktura) by id: its items, customer, schedule and settings. The API has no list endpoint for templates, so the id comes from the user (the number in the template's URL in Vyfakturuj). GET /template/{id}/. |
vyfakturuj_list_payment_methods | read | List payment methods The payment methods of the account (id_payment_method, name, type: 1 bank transfer, 2 cash, 4 cash on delivery, 8 card, ...). Use the id in vyfakturuj_create_invoice. GET /settings/payment-method/. |
vyfakturuj_list_number_series | read | List number series The numbering series (ciselne rady) of the account: id_number_series, the document type it is for, name and the number pattern. Use the id in vyfakturuj_create_invoice. GET /settings/number-series/. |
vyfakturuj_list_tags | read | List tags The tags (stitky) of the account: id_tag, name and colour. Invoices carry an id_tag. GET /settings/tags/. |
vyfakturuj_usage_status | Usage status (free-tier meter) Report the caller's current free-tier usage this month: calls used, monthly limit, remaining, and whether the cap is reached. Read-only; does not count against the meter. | |
vyfakturuj_request_feature | Request a missing feature Tell usefulapi that the user needs something the Vyfakturuj tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. | |
vyfakturuj_upgrade | Upgrade to Pro (unlimited) Subscribe to the Pro plan for UNLIMITED Vyfakturuj tool calls (the free tier caps monthly usage). Choose monthly ($9/month) or yearly ($90/year — 2 months free) billing. Returns a Stripe Checkout link to open in your browser; after payment your account upgrades automatically. Does not count against the meter. | |
vyfakturuj_cancel_subscription | Cancel the Pro subscription Cancel the caller's Vyfakturuj Pro subscription at the end of the paid period (no refund for the current period; unlimited calls continue until then, then the free tier applies). Requires confirm: true. Run vyfakturuj_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 100 tool calls / month |
| Proper user | $9/mo · $90/yr | Unlimited |
Pro covers this Vyfakturuj server only. Subscribe with vyfakturuj_upgrade (it returns a Stripe Checkout link). Cancel any time with vyfakturuj_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running vyfakturuj_upgrade before then undoes the cancel. Or write to [email protected].
No. usefulapi is an independent service. It is not affiliated with or endorsed by Vyfakturuj. The server calls the Vyfakturuj API with your own Vyfakturuj access, so it sees only the data that your account can see.
The login page asks for your Vyfakturuj login e-mail and Vyfakturuj API key. See Before you connect for where to find them.
No. 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: the login page asks for your Vyfakturuj login e-mail and Vyfakturuj API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Vyfakturuj API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Vyfakturuj.
Yes, if you approve it. 2 of the 10 Vyfakturuj tools can create or change data. The other 8 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 100 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls, for this Vyfakturuj server only. Run vyfakturuj_usage_status to see how many calls you used.
Ask the AI to run vyfakturuj_upgrade: it returns a Stripe Checkout link. To cancel, run vyfakturuj_cancel_subscription. Pro continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with vyfakturuj_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.