Colorado Information Marketplace API

Free to Use Varies (check documentation)

Overview

Colorado Information Marketplace is Colorado's official open data portal, offering free access to state government datasets on topics like public health, education, transportation, and demographics. No API key is required, making it simple to start querying right away. The portal uses the Socrata SODA API, which supports powerful filtering and pagination.

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Beginner Tip

Add ?=10 to any Socrata endpoint URL to limit your results while you explore the data structure—this avoids accidentally downloading thousands of rows.

Available Data

stock price and symbol
open/close/high/low values
trading volume
market cap
historical price data
color hex codes and names

Example Response

JSON Response
{
  "status": "success",
  "data": {
    "result": "Data from Colorado Information Marketplace",
    "description": "Colorado State Government Open Data",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

:id Internal Socrata row identifier for the record.
:created_at ISO 8601 timestamp when the record was first added to the dataset.
:updated_at ISO 8601 timestamp when the record was last modified.

Implementation Example

const url = "https://data.colorado.gov/";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

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

Common Errors & Troubleshooting

Throttled / 429 Too Many Requests Anonymous requests to the Socrata API have a low rate limit.
Register for a free Socrata app token and pass it with the X-App-Token header to get a higher rate limit.
400 Bad Request Invalid SoQL syntax in query parameters like or .
Check the Socrata SoQL reference for correct syntax and ensure column names match the dataset schema.
Wrong dataset endpoint Using an incorrect resource ID in the URL.
Navigate to the dataset on data.colorado.gov, click API, and copy the exact endpoint URL shown.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 10/20
🔒 Security 15/15
🛠 Developer XP 15/20
✓ Reliability 7/15
Response Time 861ms

Fully tested on Apr 5, 2026

Technical Specifications

Auth No Auth
HTTPS REQUIRED
CORS UNKNOWN
Category Government
Difficulty Beginner
Verified: 2026-04-04

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