Merge API — Free Tier + Pay-As-You-Go

curl -X POST https://api.convertintomp4.com/v1/convert/merge \
  -H "X-Api-Key: ck_your_api_key" \
  -F "file=@page1.pdf" \
  -F "file=@page2.pdf" \
  -F "file=@page3.pdf" \
  -F "mergeType=pdf"

import { readFileSync } from "node:fs";

const apiKey = process.env.CIM4_API_KEY;

// Two or more "file" parts, merged in upload order.
const form = new FormData();
for (const name of ["page1.pdf", "page2.pdf", "page3.pdf"]) {
  form.append("file", new Blob([readFileSync(name)]), name);
}
form.append("mergeType", "pdf");

const { jobId } = await fetch(`https://api.convertintomp4.com/v1/convert/merge`, {
  method: "POST",
  headers: { "X-Api-Key": apiKey },
  body: form,
}).then((r) => r.json());

let job;
do {
  await new Promise((r) => setTimeout(r, 2000));
  job = await fetch(`https://api.convertintomp4.com/v1/status/${jobId}`, {
    headers: { "X-Api-Key": apiKey },
  }).then((r) => r.json());
} while (job.status !== "completed" && job.status !== "failed");

console.log("Merged:", job.result?.downloadUrl);

import time, requests

api_key = "ck_your_api_key"
names = ["page1.pdf", "page2.pdf", "page3.pdf"]

# Two or more "file" parts, merged in upload order.
files = [("file", (n, open(n, "rb"), "application/pdf")) for n in names]
job = requests.post(
    "https://api.convertintomp4.com/v1/convert/merge",
    headers={"X-Api-Key": api_key},
    files=files,
    data={"mergeType": "pdf"},
).json()

while True:
    status = requests.get(
        f"https://api.convertintomp4.com/v1/status/{job['jobId']}",
        headers={"X-Api-Key": api_key},
    ).json()
    if status["status"] in ("completed", "failed"):
        break
    time.sleep(2)

print("Merged:", status.get("result", {}).get("downloadUrl"))