paper.js/examples/Node.js/JSONtoPDF.js

var paper = require('paper'),
	path = require('path'),
	fs = require('fs');

var canvas = new paper.Canvas(612, 792, 'pdf');
paper.setup(canvas);
with (paper) {
	fs.readFile('./in.json', { encoding: 'utf8' }, function (err, data) {
		if (err)
			throw err; 
		project.importJSON(data);
		view.update();
		fs.writeFile(path.resolve(__dirname, 'out.pdf'), canvas.toBuffer(), function (err) {
			if (err)
				throw err;
			console.log('Saved!');
		});
	});
}