Unire più PDF in un solo file

curl -X POST https://api.kit.forhosting.com/pdf/merge \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"pdfs":["https://ejemplo.com/a.pdf","https://ejemplo.com/b.pdf"]}'

const res = await fetch("https://api.kit.forhosting.com/pdf/merge", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "pdfs": [
      "https://ejemplo.com/a.pdf",
      "https://ejemplo.com/b.pdf"
    ]
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/pdf/merge",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "pdfs": [
        "https://ejemplo.com/a.pdf",
        "https://ejemplo.com/b.pdf"
    ]
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/pdf/merge", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => &#39;{"pdfs":["https://ejemplo.com/a.pdf","https://ejemplo.com/b.pdf"]}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"pdfs":["https://ejemplo.com/a.pdf","https://ejemplo.com/b.pdf"]}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/pdf/merge", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)