Bintray JCenter is sunsetting on 1st May 2021, so it's great to download all older artifacts in the correct order and hierarchy. use below script.

download_artifacts_from_jcenter.py

import requests
import os
from bs4 import BeautifulSoup


def checkChild(parentdir, url):

    r = requests.get(url)

    if r.headers.get('Content-Type') != 'text/html;charset=UTF-8':
        file = open(parentdir, "wb")
        file.write(r.content)
        return

    soup = BeautifulSoup(r.content, 'lxml')

    for row in soup.find_all('a'):
        href = row.get('href')
        path = os.path.join(parentdir, href)

        if path.find(str(".jar")) == -1 and path.find(str(".aar")) == -1 and path.find(str(".pom")) == -1 and path.find(str(".xml")) == -1 and path.find(str(".zip")) == -1:
            os.makedirs(path)

        checkChild(path, url + str(href))

# Replace below from your own bintray url
URL = "https://abc.bintray.com/abc/artifact_id"

checkChild(os.getcwd(), URL)

requirements.txt

beautifulsoup4
requests