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Census data that works the way you write code.

PrairieCloud wraps the U.S. Census Bureau API in a clean REST interface — human-readable variable names, consistent JSON responses, and automatic margin-of-error pairing across all ACS vintages.

Census Bureau APIBefore
# Census Bureau API
# What variable is B01003_001E? Who knows.

curl "https://api.census.gov/data/2022/acs/acs5?get=NAME,B01003_001E&for=county:031&in=state:17&key=YOUR_CENSUS_API_KEY"

# Response (array of arrays, no field names):
[
  ["NAME","B01003_001E","state","county"],
  ["Cook County, Illinois","5173146","17","031"]
]
PrairieCloud APIAfter
# PrairieCloud API
# Variable names you can read at 2am.

curl -H "X-API-Key: YOUR_PC_API_KEY" \
  "https://api.prairiecloud.io/v1/data\
?variables=sex_and_age_total_population\
&geo=county:17031&vintage=2022"

# Response (JSON, named fields, MOE included):
{
  "data": {
    "county:17031": {
      "name": "Cook County, Illinois",
      "variables": {
        "sex_and_age_total_population": {
          "estimate": 5173146,
          "margin_of_error": null
        }
      }
    }
  }
}

Jump in

Why PrairieCloud

The Census Bureau API is a 2010-era XML service retrofitted for JSON. We didn't wrap it — we redesigned the interface.

🔤

Human-readable variable names

No more decoding ACS codebooks. Every variable ships with a plain-English name like sex_and_age_total_population. The cryptic B-codes are still there if you need them — but you won't.

📍

Geographic resolution by FIPS code

Query by state, county, tract, or block group using standard FIPS codes. Nest geographies naturally: /state/17/county/031 gives you Cook County. No TIGER workarounds.

📅

Multiple vintages with automatic MOE pairing

Request any available ACS vintage and receive margin-of-error fields automatically paired with their estimates. Time-series analysis without the manual join.

Ready to query?

Free tier. No credit card. 1,000 requests/month out of the box.

Get your free API key →