MCP Invoice

mcp-invoice

Say "make an invoice for Acme, 12 hours at 90 EUR, due in 14 days" and get a real PDF you can send. This MCP server stores your business profile and your clients, allocates a sequential invoice number that is never reused, computes the subtotal, any discount, one tax line per VAT rate and the total in integer minor units, and renders an A4 PDF with your issuer and payment details, a wrapping item table and a proper totals block. It also tracks payments and, on Pro, reports what is overdue and by how many days. Everything is stored in plain JSON files on your own machine; nothing is uploaded anywhere.

Create numbered invoices with tax lines and a real PDF from chat -- no invoicing SaaS required.

60-second install

npm publish for @theluckystrike/mcp-invoice is pending. Until then, the .mcpb one-click bundle or a clone+build is the working path -- both are verified below.

One-click (.mcpb): download invoice.mcpb from the latest release and double-click it in Claude Desktop: https://github.com/theluckystrike/mcp-servers/releases/latest

Claude Desktop (claude_desktop_config.json):

{
  "mcpServers": {
    "invoice": {
      "command": "npx",
      "args": ["-y", "@theluckystrike/mcp-invoice"]
    }
  }
}

Claude Code:

claude mcp add invoice -- npx -y @theluckystrike/mcp-invoice

Cursor (.cursor/mcp.json):

{
  "mcpServers": {
    "invoice": {
      "command": "npx",
      "args": ["-y", "@theluckystrike/mcp-invoice"]
    }
  }
}

The npx form above starts working the moment the package is published. Until then, use the .mcpb bundle above, or build from source with exactly these three commands:

git clone https://github.com/theluckystrike/mcp-servers.git && cd mcp-servers
npm install
npm run build -w packages/mcp-license -w servers/invoice

Then point your client's command at node with one arg: the absolute path to servers/invoice/dist/index.js.

To run in Pro mode set MCP_LICENSE_KEY in the same config block, or call license_activate once with your key.

Tools

Tool	What it does
business_set	Store the issuer profile: name, address, email, VAT id, IBAN, bank, logo, default currency, default tax rate, payment terms, invoice prefix. tax_rate, vat_rate and vat are accepted as aliases for default_tax_rate, and any unrecognised field is reported back rather than dropped
client_add	Add or update a client (name, address, email, VAT id)
client_list	List stored clients with their ids
invoice_create	Create an invoice from line items; allocates the next number, computes discount, tax per rate and total. If the client is created from a bare name the response says the BILL TO block has no address and how to add one
invoice_from_hours	Shortcut: bill one client for N hours at an hourly rate
invoice_list	List invoices, filtered by status, client and issue-date range
invoice_get	Full stored record for one invoice number
invoice_mark_paid	Record a payment in full or in part; reports the balance due
invoice_pdf	Render the A4 PDF and return the file path. The response calls the file a PDF only when it is one
overdue_report	Unpaid invoices past due, days overdue, outstanding totals per currency. Free
license_status	Show free or Pro mode
license_activate	Activate a Pro key (verified offline)

Resource: invoices://open returns every unpaid or partly paid invoice as JSON.

What you can say

You say	Tool
"Set up my business: Acme Consulting, EUR, 23% VAT, 14 day terms."	business_set
"Add a client: Beta Corp, their VAT id is..., email billing@beta.example."	client_add
"List my clients."	client_list
"Invoice Acme for 12 hours at 90 EUR plus 300 EUR setup, 23% VAT, PDF."	invoice_create + invoice_pdf
"Bill Beta Corp for 5 hours at 120 EUR."	invoice_from_hours
"Show me every unpaid invoice from August."	invoice_list
"Pull up invoice INV-2026-0007."	invoice_get
"Mark INV-2026-0007 as paid in full."	invoice_mark_paid
"Which invoices are unpaid and overdue?"	overdue_report
"Am I on the free plan or Pro?"	license_status

Worked example

From docs/USER_VALUE_R2.md, the exact request tested end to end and independently checked against the arithmetic.

You: Invoice Acme for 12 hours of API work at 90 EUR plus a 300 EUR setup fee,
23% VAT, due in 14 days, and give me the PDF.

  invoice_create {
    client: "Acme", currency: "EUR", due_days: 14,
    items: [
      { description: "API work",  quantity: 12, unit_price: 90,  tax_rate: 23 },
      { description: "Setup fee", quantity: 1,  unit_price: 300, tax_rate: 23 }
    ]
  }
  -> INV-2026-0001, client "Acme" created with no address on file

  invoice_pdf { number: "INV-2026-0001" }
  -> /Users/you/.../invoice/pdf/INV-2026-0001.pdf

Assistant: Created INV-2026-0001 for Acme.
  API work    12 h  x  EUR 90.00   =  EUR 1080.00
  Setup fee    1    x  EUR 300.00  =  EUR 300.00
  Subtotal                            EUR 1380.00
  Tax 23% on EUR 1380.00               EUR 317.40
  Total                                EUR 1697.40
Note: Acme was created from a bare name with no address. Add one with
client_add before you send this. PDF: INV-2026-0001.pdf

The arithmetic: 12 x 90 = 1080.00, plus 300.00 = 1380.00 subtotal; 23% of 1380.00 = 317.40; total 1697.40 EUR. Every amount on the PDF and in the text response carries its currency code -- nothing is ever shown as a bare number.

Free vs Pro

	Free	Pro
Invoices	3 per calendar month	Unlimited
overdue_report	Yes, unlimited	Yes, unlimited
PDF	Carries the line "Generated with mcp-invoice by theluckystrike"	No branding
Logo on the PDF	No	Yes
Custom invoice prefix	No, fixed INV	Yes
Clients, tax lines, discounts, payments, multi-currency	Yes	Yes

Pro is a one-time $19, or $39 for every server in the collection, lifetime.

Get Pro: https://mcp.zovo.one/buy/invoice

Numbers and money

Invoice numbers are PREFIX-YYYY-NNNN. The counter is persisted per prefix and year and is written before the invoice is stored, so a crash burns a number rather than reusing one; existing numbers are also scanned so a restored data file can never hand back a number that is already on a sent document.

Every money value printed anywhere - line unit prices, line amounts, subtotal, discount, each tax line, the total and the balance due, in the text response and on the PDF - carries its currency code, for example EUR 1080.00. No amount is ever shown as a bare number.

All amounts are held as integer minor units. How many make one unit comes from an ISO 4217 table, not a guess: 2 for most currencies, 0 for JPY, KRW, VND, CLP, ISK and the rest of the zero-decimal list, 3 for BHD, IQD, JOD, KWD, LYD, OMR and TND, 4 for CLF and UYW. KWD 1.234 is 1234 minor units, not 123. The table is identical to the one in mcp-expense-tracker, because the two servers exchange amounts and a currency that is 3-decimal in one and 2-decimal in the other would rescale money by ten. HUF is 2 decimals: ISO 4217 gives it two minor digits even though it is usually quoted without them. Rounding is per line, then summed: each line's gross is rounded first, an invoice-level discount_percent is applied and rounded per line, tax is computed and rounded per line and then grouped into one line per rate, and the totals are plain integer sums of those already-rounded values. A printed total can therefore never disagree with the printed lines. Dates are ISO YYYY-MM-DD.

How it stores data

Business profile, clients, invoices and the number counter live under ${XDG_DATA_HOME:-~/.local/share}/mcp-servers/invoice/ as separate JSON files, plus a pdf/ subfolder holding the rendered PDFs. Every mutating call (business_set, client_add, invoice_create, invoice_from_hours, invoice_mark_paid) runs inside locked(), which takes an advisory lock file at .../invoice/.lock for the duration of the call -- this is what makes number allocation safe when two invoices are created in the same second, since the counter read, increment and invoice write all happen under one lock. Saves go to a temporary file and are renamed into place. To back up your invoicing data, copy the whole invoice/ data directory, including pdf/ if you want the rendered files too -- they can always be regenerated from the stored records with invoice_pdf.

Limits and honest caveats

• Free tier allows 3 invoices per calendar month; the counter resets on the 1st. overdue_report and everything else (clients, tax lines, discounts, payments, multi-currency) is unrestricted on free.
• Free PDFs carry a small "Generated with mcp-invoice" footer line; Pro removes it and adds a logo.
• Creating an invoice for a client name the server has never seen creates that client with no address -- the response says so and names client_add as the fix, but nothing blocks you from sending a PDF with a bare-name BILL TO block if you ignore the note.
• There is no email-sending, payment-link or accounting-software sync in this server: it produces the PDF and the record; getting it to the client is up to you.
• Currency conversion is not performed anywhere -- an invoice's currency is fixed at creation and every line must use amounts already in that currency.

Troubleshooting

• npx hangs or fails to find the package: npm publish for this package is pending. Use the .mcpb bundle or the clone-and-build path above until it lands.
• Using the .mcpb bundle: it installs into Claude Desktop directly; there is no separate config step.
• Using the clone path: the server binary is servers/invoice/dist/index.js after npm run build. Point your client's command at node with that absolute path as the only argument.
• Node version: requires Node >= 18. Check with node -v.
• No business profile yet: invoicing is never blocked by it. invoice_create and invoice_from_hours issue the document with the placeholder issuer "Your business" and say so in one line; run business_set {name, address, vat_id, iban} and render the PDF again to replace it.
• PDF render fails or looks wrong: invoice_pdf uses pdfkit, a pure-JS renderer with no native dependency, so failures are almost always a missing or malformed business_set field (check invoice_get first) rather than an environment issue.
• "3 invoices this month" hit unexpectedly: the free cap is per calendar month across all clients, not per client. invoice_list shows what already counted against it.
• Nothing shows up / silent failures: logs go to stderr only, never stdout. In Claude Desktop check Settings -> Developer -> the server's log file; in Claude Code check the terminal or --mcp-debug.

Privacy

All data stays local, in ${XDG_DATA_HOME:-~/.local/share}/mcp-servers/invoice/. There are no network calls: license keys are verified offline with a public key compiled into the package, and PDFs are rendered on your machine.

Pairs with

• mcp-time-tracker -- invoice_summary output there maps directly onto invoice_create line items here.
• mcp-spreadsheet -- pull line items or client lists out of a sheet before invoicing.
• mcp-price-tracker -- invoice a client for something you tracked the price of.
• office-suite -- all four servers behind one install, one config entry.
• Guide: Create an invoice PDF from a chat message with an MCP server

FAQ

Can I put several VAT rates on one invoice? Yes. Tax rate is per line item. The totals block prints one tax line per distinct rate, so a 23% line and a 0% reverse-charge line appear separately and the total adds up.

Is the PDF good enough to send to a client's accounts department? It is a single page A4 with issuer and client blocks, dates, a line table with per-line tax, subtotal, tax lines, total, and payment details with IBAN and reference. Add the client's address with client_add first, otherwise BILL TO shows only the name.

What is the invoice number format and can I change it? INV-YYYY-NNNN, allocated in sequence and never reused. The prefix is configurable with business_set; a prefix other than INV is a Pro feature.

Does anything get uploaded when the PDF is rendered? No. Rendering is local with pdfkit, and the invoice records live in ~/.local/share/mcp-servers/invoice/. The server makes no network calls at all.

How exact is the money arithmetic? Amounts are integer minor units. Each line is rounded once, then lines are summed, so 12 h at 90 EUR plus 300 EUR with 23% VAT gives 1380.00 plus 317.40 = 1697.40 with no floating point residue.

Built by theluckystrike.