Welcome to CapitolMath

CapitolMath gathers U.S. legislative data — bills, roll-call votes, legislators, committees and hearings in all 50 states and the U.S. Congress — and adds measures of its own on top: political lean, legislative velocity, and bipartisan and popularity indices.

You don't need to sign in to look around. Every state, bill, vote, legislator and analysis is open to anyone. Signing in adds watching bills and email notifications; a Full license adds saved views, exports and API keys.

What you can do here#

• Follow legislation. Search and filter bills in any state, compare a bill's versions, and read its full action history.
• Know the people. See how each legislator votes, what they sponsor, and where they sit on the economic and social scales.
• Keep track. Save the filters you use as views, collect bills into lists, and watch the ones you want emailed about.
• Work as a team. Track the bills your organization works on with your position, priority, status and owner; decide on new bills from an Inbox; write notes, assign tasks and send reports.
• Publish. Build scorecards that grade legislators on the votes you care about, and embed widgets on your own site.
• Build on the data. Pull it into your own tools with the REST API, webhooks and bulk datasets.

How this help is organized#

Help is a set of books, each for a kind of work:

• Using CapitolMath — bills, officials, committees and the calendar; saved views, lists and watching bills.
• Tracking — your organization's own work on bills: My work and the Inbox, tracked items, notes, tasks and reports.
• Administering your organization — members, roles and licenses, groups, billing and the audit log.
• Data & methodology — where the data comes from and how each measure is worked out.

Press ⌘K (Ctrl K on Windows) on any page to search help without leaving what you're doing. For endpoint-by-endpoint detail, see the API reference.

Where to start#

• New to an organization someone invited you to? Read Roles and licenses to see what your role and license let you do.
• Tracking bills with your team? Start with Getting started with tracking.
• Reading a legislator's or a bill's lean? Political lean scoring explains the 1–5 scale.
• Wondering how fresh the data is? See Data sources.