Data USA API

Overview

Measurement Record

What actually happened when we called this API from our own infrastructure. Every value below was recorded by the request, not copied from the provider's documentation.

Request

GET https://api.datausa.io/tesseract/members?cube=acs_yg_total_population_5&level=State

Result

HTTP 200 · application/json · 2,386 bytes

Response time

175 ms (median of 3) · fastest 171 ms

Transport

TLSv1.3 · TLS_AES_256_GCM_SHA384 · certificate issued by Let's Encrypt

Browser CORS

Allowed — Access-Control-Allow-Origin: *

Served by

nginx/1.18.0 (Ubuntu)

Recorded

2026-08-10

Fields Returned

Top-level fields present in the response we captured, with the type and value we actually received.

Captured Response

Captured from a real request to https://api.datausa.io/tesseract/members?cube=acs_yg_total_population_5&level=State on 2026-08-10. Long arrays and nested objects are truncated to keep the shape readable.

{
  "name": "State",
  "caption": "State",
  "depth": 1,
  "annotations": {},
  "properties": [
    {
      "name": "Area",
      "caption": "Area",
      "type": "i64",
      "annotations": {}
    }
  ],
  "dtypes": {
    "State ID": "str",
    "State": "str"
  },
  "members": [
    {
      "key": "",
      "caption": ""
    }
  ]
}

Implementation Example

Calls a real endpoint of this API. Replace any placeholder credentials with your own key.

const url = "https://datausa.io/api/data?drilldowns=Nation&measures=Population&year=latest";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

import requests

url = "https://datausa.io/api/data?drilldowns=Nation&measures=Population&year=latest"
headers = {}

response = requests.get(url, headers=headers, timeout=30)
response.raise_for_status()
data = response.json()
print(data)

curl "https://datausa.io/api/data?drilldowns=Nation&measures=Population&year=latest"

What Can You Build?

// Fetch government/public data
const response = await fetch(`https://datausa.io/about/api`);
const data = await response.json();
const records = data.results || data.data || data.records || [];
const items = Array.isArray(records) ? records : [records];
items.slice(0, 5).forEach(item => {
  console.log('Record:', item.title || item.name || JSON.stringify(item));
});

// Visualize government data
const response = await fetch(`https://datausa.io/about/api`);
const data = await response.json();
console.log('Data source: Data USA');
const stats = data.statistics || data.data || data;
document.getElementById('gov-dashboard').innerHTML =
  `<pre>${JSON.stringify(stats, null, 2)}</pre>`;

// Query government datasets
const response = await fetch(`https://datausa.io/about/api`);
const data = await response.json();
const results = data.results || data.items || [];
console.log(`Found ${results.length || 'N/A'} records`);
results.slice(0, 3).forEach(r => {
  console.log(`📋 ${r.title || r.name}: ${r.description || ''}`);
});

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

How This API Fails

We deliberately sent this API a broken request and recorded exactly what came back on 2026-08-10. Knowing the shape of an error before you hit it makes error handling much easier to write.

{
  "detail": "Not Found"
}

{
  "error": true,
  "detail": "Failed attempt to get a Cube object with name '!!!invalid!!!': Entity doesn't exist",
  "debug_mode": true,
  "type": "InvalidEntityName",
  "traceback": [
    "Traceback (most recent call last):\n",
    "  File \"/app/lib/python3.12/site-packages/starlette/_exception_handler.py\", line 42, in wrapped_app\n    await app(scope, receive, sender)\n",
    "  File \"/app/lib/python3.12/site-packages/starlette/routing.py\", line 73, in app\n    response = await f(reques
…

Common Errors & Troubleshooting

Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.