Sources
Each record returned by the API includes provider, classification, source URL, retrieval time, and cache status. LegiScan appears only when state legislation is enabled.
U.S. Census Geocoder
official
https://geocoding.geo.census.gov/geocoder/Congress.gov
official
https://www.congress.gov/FEC
official
https://www.fec.gov/House Clerk
official
https://clerk.house.gov/U.S. Senate
official
https://www.senate.gov/LegiScan
third party
https://legiscan.com/Congressional trade disclosures
third party
https://disclosures-clerk.house.gov/