Yahoo doesn't provide an API to it's groups, this can make finding out information about Yahoo groups pretty hard without visiting the group pages and checking manually.
This site aims to fill that gap by providing a public, but third-party, API to finding out the public information about Yahoo groups.
The (Unofficial) Yahoo groups public data API provides a JSON API for finding out publicly available Yahoo group data. If the information you need is publicly visible on a Yahoo groups page, this API can provide it as json. give it a go and see what it can do:
Put the following in a file and run it with