Blank Invoice Maker — MCP Server
An MCP server that lets any AI assistant (Claude, and other MCP clients) create invoices with Blank Invoice Maker — the free, no-signup, no-watermark invoice generator.
Ask your assistant to make an invoice, and it returns a link that opens blankinvoicemaker.com with the invoice fully pre-filled, ready to review and download as a PDF.
Privacy by design. The invoice data travels inside the link's URL fragment (
#invoice=…) and is decoded entirely in your browser. Nothing is uploaded — consistent with Blank Invoice Maker's no-account, no-server-storage model.
Tools
| Tool | What it does |
|---|---|
list_templates | Lists the industry invoice templates available at blankinvoicemaker.com/templates (slug, name, description, URL). |
create_invoice | Builds an invoice from your details and returns a pre-filled blankinvoicemaker.com link to review and download. |
create_invoice example
"Invoice Globex LLC for 10 hours of design at $90/hr and one $120 hosting setup, net 14, in GBP."
The assistant calls create_invoice with:
{
"business": { "name": "Acme Studio", "email": "hi@acme.studio" },
"client": { "name": "Globex LLC", "email": "ap@globex.com" },
"items": [
{ "description": "Design work", "quantity": 10, "unitPrice": 90, "unit": "hours" },
{ "description": "Hosting setup", "quantity": 1, "unitPrice": 120 }
],
"currency": "GBP",
"paymentTerms": "Net 14"
}
…and returns a https://blankinvoicemaker.com/#invoice=… link that opens the editor pre-filled.
Installation
Requires Node.js 18+.
Claude Desktop
Add to your claude_desktop_config.json:
{
"mcpServers": {
"blank-invoice-maker": {
"command": "npx",
"args": ["-y", "blank-invoice-maker-mcp"]
}
}
}
Other MCP clients
Run the server over stdio:
npx -y blank-invoice-maker-mcp
How it works
create_invoice maps your input into the invoice structure used by blankinvoicemaker.com, compresses it with lz-string, and appends it to the site URL as a #invoice= fragment. Opening the link hydrates the editor in your browser — no signup, no watermark, no data leaving your machine.
Development
npm install
npm run build # compile TypeScript to dist/
npm test # build + run the unit tests
npm start # run the server over stdio
Keeping templates in sync
src/templates-data.ts is generated from the Blank Invoice Maker template registry:
BIM_APP_DIR=/path/to/blank-invoice-maker npm run generate:templates
Links
- App: https://blankinvoicemaker.com
- Templates: https://blankinvoicemaker.com/templates
- Model Context Protocol: https://modelcontextprotocol.io