https://www.govtrack.us/
GovTrack.us: Tracking the U.S. Congress and the White House
Tracking legislation and votes in the United States Congress and actions by the White House.
the uwhite housegovtracktrackingcongress
https://temboo.com/library/Library/GovTrack/CommitteeMember/
Library - GovTrack - CommitteeMember API :: Temboo
Returns records indicating the current membership of a Member of Congress on a committee or subcommittee.
librarygovtrackapi