Congressional roster
unitedstates/congress-legislators
Identity, term, district and official identifiers. Community-maintained normalization; verify time-sensitive changes.
OVERSEEDC RESEARCH STANDARD
Source registry
Every connected system, its collection scope, update model, known limitations and last successful synchronization.
District population
U.S. Census Bureau ACS via Census Reporter
Estimates include margins of error and do not represent a current population count.
Campaign finance
Federal Election Commission API
No successful hosted synchronization is recorded because a server-side FEC API key is not configured. Unitemized contributions do not expose donation counts.
Diplomatic missions
DC Government Open Data / Data.gov
Contact details may change; official mission websites remain authoritative.
Agency reference
USA.gov and official agency websites
Initial directory is intentionally limited and does not imply full federal coverage.