Invoices & PDFs from a single API call
Slipstack turns JSON into pixel-perfect invoices, receipts, and documents in milliseconds. Skip the brittle HTML-to-PDF stack and ship billing today.
No credit card required · Live in under 5 minutes
curl -X POST https://slipstack.dev/api/v1/pdf \
-H "Authorization: Bearer psk_live_xxx" \
-H "Content-Type: application/json" \
-d '{
"template": "invoice",
"data": {
"from": { "name": "Acme Inc", "email": "billing@acme.com" },
"to": { "name": "Globex LLC", "email": "ap@globex.com" },
"number": "INV-1024",
"dueDate": "2026-07-01",
"items": [
{ "description": "Pro plan (June)", "quantity": 1, "unitPrice": 49 },
{ "description": "Overage (1,200 docs)", "quantity": 1200, "unitPrice": 0.01 }
],
"taxRate": 8.5
}
}' --output invoice.pdfEverything billing needs, nothing it doesn't
One JSON call
POST your data, get a PDF back synchronously. No queues, no polling, no rendering servers to babysit.
Pixel-perfect templates
Professionally designed invoice and receipt layouts with your logo, colors, taxes, and discounts built in.
Built for serverless
Pure rendering engine — no Chromium binary, no 250MB cold starts. Deploys anywhere and returns in milliseconds.
Usage that scales
Start free, then pay only for what you render. Transparent per-document overage on paid plans.
Test & live keys
Separate test and live API keys so you can build confidently before charging a customer.
Your brand, not ours
Custom logos, accent colors, and fonts on paid plans. The output is yours, end to end.
Simple, usage-based pricing
Start free. Upgrade when you grow.
Ship invoicing this afternoon
Grab a key, paste the curl example, and you'll have a branded PDF in your hands before your coffee's cold.
Get your API key