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Open States API v3

Civic & Legal Free key (no card)

AuthenticationFree key (no card)
Rate limitFree tier reported around 500 requests/day; check your dashboard for current limits.

Documentation: docs.openstates.org ยท Checked Sep 13, 2026

About

Open States (now run by Plural Policy) tracks bills, votes, legislators, committees, and events across all 50 state legislatures plus D.C. and Puerto Rico. The state-level equivalent of the Congress.gov API. The v3 API returns clean JSON you can search by bill number, sponsor, subject, or state. A free key gets you in, with a few hundred requests a day.

Details

Free to start. You may need a free key, but no credit card.

Auth: Free key (no card)

Rate limit: Free tier reported around 500 requests/day; check your dashboard for current limits.

Verified: 2026-09-13

Best for: personal developer business fun

Read the docs Back to catalog

Setup

  1. Sign up for a free key on the Open States signup page.
  2. Read the v3 docs to learn the main endpoints: bills, people, votes, events.
  3. Call an endpoint with your key, e.g. bills filtered by state and session.
  4. Use the 'jurisdiction' parameter to switch between states.
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