Send JSON.Get a PDF.

curl https://pdfoven.com/v1/pdf \
  -H "Authorization: Bearer $PDFOVEN_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "template_id": "tpl_invoice",
    "data": { "number": "INV-2041", "to": { "name": "Acme Inc." } }
  }' \
  -o invoice.pdf

const res = await fetch("https://pdfoven.com/v1/pdf", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.PDFOVEN_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    template_id: "tpl_invoice",
    data: { number: "INV-2041", to: { name: "Acme Inc." } },
  }),
});

await fs.writeFile("invoice.pdf", Buffer.from(await res.arrayBuffer()));

import os, requests

res = requests.post(
    "https://pdfoven.com/v1/pdf",
    headers={"Authorization": f"Bearer {os.environ['PDFOVEN_KEY']}"},
    json={
        "template_id": "tpl_invoice",
        "data": {"number": "INV-2041", "to": {"name": "Acme Inc."}},
    },
)
open("invoice.pdf", "wb").write(res.content)

$res = Http::withToken(env('PDFOVEN_KEY'))
    ->post('https://pdfoven.com/v1/pdf', [
        'template_id' => 'tpl_invoice',
        'data' => ['number' => 'INV-2041', 'to' => ['name' => 'Acme Inc.']],
    ]);

Storage::put('invoice.pdf', $res->body());

body := strings.NewReader(`{"template_id":"tpl_invoice","data":{"number":"INV-2041"}}`)
req, _ := http.NewRequest("POST", "https://pdfoven.com/v1/pdf", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("PDFOVEN_KEY"))
req.Header.Set("Content-Type", "application/json")

res, err := http.DefaultClient.Do(req)

Works as-is with your free key: tpl_invoice is a built-in template every account can use.

curl https://pdfoven.com/v1/pdf/merge \
  -H "Authorization: Bearer $PDFOVEN_KEY" \
  -F files=@cover.pdf \
  -F files=@report.pdf \
  -o merged.pdf

Try them without code: merge, compress, watermark and fill a form, free and with no signup.