Census.gov API
Government · Operational · 30d uptime 100%
The Census Bureau's mission is to serve as the nation's leading provider of quality data about its people and economy.
Trust signals
Pricing
FREE
Auth
NONE
CORS
No
Rate limit
500 requests/day per API key
Health
439ms
Trust score
87 (B)
Last checked Oct 19, 2026 · uptime 24h 100% / 7d 100% / 30d 100%
Strong candidate; weakest signal is CORS.
Links
- Homepagewww.census.gov
- Documentationwww.census.gov/data/developers
- Base URLwww.census.gov/data/developers/data-sets.html
Integration checklist
- Auth is NONE
- No CORS — route calls through your backend.
- Rate limit: 500 requests/day per API key