Open States API v3

REST discovered

Details

URL: https://v3.openstates.org/
Spec: https://v3.openstates.org/openapi.json
Spec (json): https://api.apis.guru/v2/specs/openstates.org/2021.11.12/openapi.json
Docs: https://docs.openstates.org/api-v3/

Authentication

Open States API key api_key discovered Get key ↗

X-API-KEY: <credential> /?apikey=<credential>

Create or sign in to your Open States/Plural account, then go to API key profile to register and manage your API key. The API v3 docs say API keys are required; the site history page notes open.pluralpolicy.com provides API key registration and management.