DocFast API

Fast, simple HTML/Markdown to PDF API with built-in invoice templates.

Quick Start

npm install
npm run build
API_KEYS=your-key-here npm start

Endpoints

Convert HTML to PDF

curl -X POST http://localhost:3100/v1/convert/html \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"html": "<h1>Hello</h1><p>World</p>"}' \
  -o output.pdf

Convert Markdown to PDF

curl -X POST http://localhost:3100/v1/convert/markdown \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"markdown": "# Hello\n\nWorld"}' \
  -o output.pdf

Invoice Template

curl -X POST http://localhost:3100/v1/templates/invoice/render \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "invoiceNumber": "INV-001",
    "date": "2026-02-14",
    "from": {"name": "Your Company", "email": "you@example.com"},
    "to": {"name": "Client", "email": "client@example.com"},
    "items": [{"description": "Service", "quantity": 1, "unitPrice": 100, "taxRate": 20}]
  }' \
  -o invoice.pdf

Options

• format: Paper size (A4, Letter, Legal, etc.)
• landscape: true/false
• margin: {top, right, bottom, left} in CSS units
• css: Custom CSS (for markdown/html fragments)
• filename: Suggested filename in Content-Disposition header

Auth

Pass API key via Authorization: Bearer <key>. Set API_KEYS env var (comma-separated for multiple keys).

Docker

docker build -t docfast .
docker run -p 3100:3100 -e API_KEYS=your-key docfast