HTML
in, PDF
one POST, one job IDout.

# Convert a URL to a PDF — async job model
curl -X POST https://login.21pdf.com/v1/convert \
  -H "Authorization: Bearer $QPDF_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://example.com/invoice/8412",
    "options": {
      "page_size": "A4",
      "orientation": "portrait",
      "margin_top": "20mm",
      "wait_for_network_idle": true
    }
  }'
# → { "job_id": "5f1c3e2a-...", "status": "pending" }
# Then: GET /v1/jobs/{job_id}/download once status == "completed"

// No SDK yet — the raw HTTP API is the surface.
const res = await fetch("https://login.21pdf.com/v1/convert", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.QPDF_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    url: "https://example.com/invoice/8412",
    options: { page_size: "A4", wait_for_network_idle: true },
  }),
});
const { job_id } = await res.json();

# Standard library requests — no pip install needed from us.
import os, requests

r = requests.post(
    "https://login.21pdf.com/v1/convert",
    headers={"Authorization": f"Bearer {os.environ['QPDF_KEY']}"},
    json={
        "url": "https://example.com/invoice/8412",
        "options": {"page_size": "A4", "wait_for_network_idle": True},
    },
)
job_id = r.json()["job_id"]

// Plain net/http. No qpdf-go package exists; we'd rather you see that.
body, _ := json.Marshal(map[string]any{
    "url": "https://example.com/invoice/8412",
    "options": map[string]any{
        "page_size": "A4",
        "wait_for_network_idle": true,
    },
})
req, _ := http.NewRequest("POST", "https://login.21pdf.com/v1/convert", bytes.NewReader(body))
req.Header.Set("Authorization", "Bearer "+os.Getenv("QPDF_KEY"))