example URL
$a = Invoke-WebRequest -Uri "https://global.apis.naver.com/commentBox/cbox/web_neo_list_jsonp.json?ticket=webtoon&templateId=default_new&pool=cbox&_callback=blab&lang=en&country=&objectId=w_1499_33&categoryId=&pageSize=30&indexSize=30&groupId=&listType=OBJECT&pageType=default&token=null&consumerKey=BasdOXg&snsCode=null&page=1&initialize=true&userType=&useAltSort=true&replyPageSize=30&sort=favorite&_=156493" -Headers @{"Referer"="https://www.webtoons.com/en/fantasy/castle-swimmer/episode-33/viewer?title_no=1499&episode_no=33"; "User-Agent"="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36"} $a.content
$c = Invoke-WebRequest -Uri "https://global.apis.naver.com/commentBox/cbox/web_neo_list_jsonp.json?ticket=webtoon&templateId=default_new&pool=cbox&_callback=a&lang=en&country=&objectId=c_117474_116&categoryId=&pageSize=30&indexSize=30&groupId=&listType=OBJECT&pageType=default&token=null&consumerKey=BasdOXg&snsCode=null&page=1&initialize=true&userType=&useAltSort=true&replyPageSize=30&sort=favorite&_=156493" -Headers @{"Referer"="https://www.webtoons.com"; "User-Agent"="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36"}
$c.content
note it is objectId=c for challenge and objectId=w for non challenge
To get list of episodes, need to scrape webpage.
What we do is https://www.webtoons.com/en/challenge/i-wish-i-were-you/list?title_no=117474&page=12 start at page 1 and increase until no new comics are found.
need to find easy javascript html scraping library.
loading a comment reply Invoke-WebRequest -Uri "https://global.apis.naver.com/commentBox/cbox/web_neo_list_jsonp.json?ticket=webtoon&templateId=default_new&pool=cbox&_callback=jQuery17046051372282569436_1565219908479&lang=en&country=&objectId=c_117474_116&categoryId=&pageSize=10&indexSize=10&groupId=&listType=OBJECT&pageType=default&token=null&consumerKey=BiqLr39tq3iAWWxuiOXg&snsCode=null&parentCommentNo=91600052&page=1&userType=&_=1565219930232" -Headers @{"Sec-Fetch-Mode"="no-cors"; "Referer"="https://www.webtoons.com/en/challenge/i-wish-i-were-you/chapter-81/viewer?title_no=117474&episode_no=116"; "User-Agent"="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36"}