API

Data API for Researchers & Developers

Programmatic access to politician voting records, issue scores, and district-level opinion data.

Politician Scores

Issue-by-issue voting position scores for every current member of Congress, normalized to a consistent −2 to +2 scale across 13 policy areas.

District Aggregates

Aggregate public opinion data for congressional districts — where voters in a district actually stand on each issue. User-identifiable fields are removed after 90 days.

Roll Call Source Data

The underlying vote records used to generate each score, with bill identifiers and vote dates for full auditability.

Who Uses This

  • Academic researchers — studying voting patterns, political polarization, or constituent-representative alignment
  • Journalists & newsrooms — building issue trackers or interactive voter guides
  • Civic tech developers — apps that help voters research candidates or track how their representatives vote
  • Nonprofits & advocacy groups — analyzing voting records on specific policy areas

District-Level Voter Data

Are you a candidate, incumbent, or organization interested in district-level voter data? Tell us about your use case and we'll be in touch.