FastOpenData turns a swamp of Census CSVs, TIGER shapefiles, and outdated FTP servers into a single, clean, fast HTTP interface. Stop reinventing the wheel.
# Any U.S. address curl https://api.fastopendata.io/v1/lookup \ -H "Authorization: Bearer $API_KEY" \ -d '{"address": "350 5th Ave, New York, NY"}'
FastOpenData{
"address": "350 5th Ave, New York, NY 10118",
"tract": "36061010900",
"county": "New York County, NY",
"acs": {
"median_household_income": 94800,
"pct_college_educated": 0.71,
"population_density_sqmi": 72140
},
"geo": {
"lat": 40.7484, "lon": -73.9967,
"timezone": "America/New_York"
},
// + 200 more fields …
}
No SDK. No schema to learn. No data pipeline to maintain.
POST a freeform address string or a lat/lon pair. The API geocodes, resolves to a Census tract, and enriches — all in one call.
ACS demographics, TIGER geography, OSM points of interest, USAspending contracts, and more — prejoined, normalized, typed, and refreshed weekly.
Filter by ?fields= to return only what your app uses. Every field has a stable name, a type signature, and a source citation.
Every dataset is kept up to date automatically — no cronjobs on your end.
Income, education, housing, commute, and 80+ demographic variables at the tract level from the American Community Survey.
Census tract and county boundaries, congressional districts, ZIP code tabulation areas, and urban/rural classifications.
Points of interest counts within configurable radii — transit stops, hospitals, schools, parks, and grocery stores.
Federal contract and grant awards aggregated by tract — total awards, agency breakdown, and per-capita figures.
Air quality index history, Superfund site proximity, and lead-paint exposure risk percentiles by Census tract.
CDC PLACES chronic disease prevalence, mental health indicators, and healthcare access metrics at the tract level.
The data is public. The joins are our problem. Get a free API key and query your first address in under five minutes.