All servers · Buy Pro $19 · Source · Claude Desktop bundle (.mcpb)
Make a QR code or a barcode in the conversation you are already in. Paste a URL and get a QR code you can put on a flyer. Give a client's invoice an EPC payment code their banking app scans and fills in for them. Print an EAN-13 for a product, a Code 128 for a shelf label, a WiFi code for the office wall, a vCard for a conference badge. Everything is drawn on your machine: no upload, no account, no API key, and no network call of any kind.
Claude Desktop, ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or
%APPDATA%\Claude\claude_desktop_config.json (Windows):
{
"mcpServers": {
"barcode": { "command": "npx", "args": ["-y", "@theluckystrike/mcp-barcode"] }
}
}
Claude Code:
claude mcp add barcode -- npx -y @theluckystrike/mcp-barcode
Cursor, .cursor/mcp.json:
{
"mcpServers": {
"barcode": { "command": "npx", "args": ["-y", "@theluckystrike/mcp-barcode"] }
}
}
| tool | what it does |
|---|---|
qr_create |
Text or a URL as a QR code, at any error correction level, SVG or PNG |
qr_wifi |
A code that joins a WiFi network when scanned |
qr_vcard |
A code that adds a contact (vCard 3.0) |
qr_payment_sepa |
An EPC069-12 payment code a euro banking app scans: IBAN, name, amount, reference |
invoice_payment_qr |
The payment code for an invoice, using the IBAN and name from your shared business profile |
barcode_create |
Code 128, EAN-13, EAN-8 or UPC-A, with the check digit computed or verified |
barcode_batch |
Many codes in one call, into a directory (Pro) |
code_list |
What you have generated, and how much of this month's free allowance is left |
license_status, license_activate |
Free or Pro, and activating a key |
| Free | Pro | |
|---|---|---|
| Codes per calendar month | 20 | Unlimited |
| SVG (prints at any size) | Yes | Yes |
| PNG | No | Yes, 32 to 4000 px |
barcode_batch |
No | Yes, up to 500 rows a call |
| QR, WiFi, vCard, SEPA payment codes, all four barcode symbologies | Yes | Yes |
Get Pro: https://mcp.zovo.one/buy/barcode - $19 one time, or $39 for every server in the suite, lifetime. Keys verify offline; nothing is sent anywhere.
Give barcode_create twelve digits and the thirteenth is computed for you. Give it thirteen and the thirteenth is
checked:
Error: EAN-13 check digit is wrong: "5901234123450" ends in 0, but the first 12 digits give 7.
Pass 5901234123457, or pass the first 12 digits and the check digit is computed. Nothing was written.
The alternative, silently redrawing the code the caller asked for, prints a label that scans as a different product, and nobody finds out until the till. The same rule applies to the IBAN in a payment code: it is validated with ISO 7064 mod 97 before anything is drawn, so a transposed pair of digits is caught here rather than by a payment that goes nowhere.
A typical EPC payment record (IBAN, beneficiary, EUR 120.50, an invoice number) is 73 bytes. QR codes come in fixed capacity steps, so raising the error correction level does not raise the code size smoothly:
| level | recoverable | QR version | modules a side | change |
|---|---|---|---|---|
| L | 7% | 4 | 33 | baseline |
| M | 15% | 4 | 33 | no change at all |
| Q | 25% | 6 | 41 | +24% |
| H | 30% | 7 | 45 | +36% |
L and M land in the same version 4 symbol: at this payload size the extra recovery data still fits in the same
box, so choosing L over M buys nothing and gives up half the damage tolerance. That is why M is the default
here. Q and H are worth asking for only when the code will be printed small, on something that creases, or
behind a logo. On a 300 px PNG the same step costs bytes too: 2,419 at M against 3,462 at H.
The same payment code written both ways, at five sizes:
| requested size | PNG bytes | SVG bytes |
|---|---|---|
| 128 px | 1,481 | 2,079 |
| 256 px | 2,186 | 2,079 |
| 512 px | 3,589 | 2,079 |
| 1024 px | 7,585 | 2,081 |
| 2048 px | 21,688 | 2,081 |
An SVG carries the module grid, not the pixels, so its size barely moves: the two extra bytes at 1024 px are the width attribute getting longer. Below roughly 200 px a PNG is smaller; above it the PNG grows without limit and the SVG does not, and the SVG is the one that stays sharp when a printer scales it up. That is the reason the free tier is the SVG tier rather than a small-PNG tier: for the thing most people do with a code, put it in a document and print it, SVG is the better file, not the consolation prize.
Everything stays on your machine. There is no network code in this server at all: no fetch, no HTTP client,
no telemetry. Codes are written where you say, and a small register of what was generated lives under
~/.local/share/mcp-servers/barcode/ (or $XDG_DATA_HOME). License keys verify offline with a public key.
Built by theluckystrike. Support: support@zovo.one
Exact config path, entry and caveats: Claude Desktop · Claude Code · Cursor · VS Code · Windsurf · Cline · Claude.ai and Claude Desktop connectors · all clients
MCP Barcode vs qrcode and Barcode Generator API: which MCP server to pick · all comparisons
How to track billable hours inside Claude Code and Cursor · Create an invoice PDF from a chat message with an MCP server · Ask questions about an Excel or CSV file from Cursor or Claude · Watch a product price with Claude and get told when it drops · What the free tier includes and what Pro adds · Log expenses and mileage in Claude, split VAT, rebill to an invoice · Convert currencies in Claude with real ECB rates, no API key · Generate Word proposals and contracts from a chat message · Find a meeting time across time zones without doing the arithmetic · Write a resume and a cover letter from chat, without inventing anything · Bill a retainer on a schedule without a billing SaaS · Assemble a contract from your own clause library, in chat · Connect MCP servers to Claude.ai, Claude Desktop, Cursor and VS Code without installing anything · Merge, split and stamp PDFs from chat, and why some come back as glyph numbers · Read a .ics calendar in Claude: free and busy, conflicts, and billable meetings · Run a kanban board in Claude, with time tracking on the same task · Resize, compress and watermark images from a chat message · Categorize and reconcile a bank CSV export from chat · Send a quote from chat, then turn the yes into an invoice · Put a SEPA payment QR code on an invoice from chat · All guides