Open Data & Free API

Name: US City Climate Data
Creator: CityCheck
License: https://creativecommons.org/licenses/by/4.0/

All CityCheck data is freely available via REST API. No API key, no rate limits, no signup. Use it in your apps, research, AI agents, or analysis.

OpenAPI Spec llms.txt AI Plugin Manifest

City Safety & Crime Rates

FBI-calibrated safety grades (A+ to F), risk levels, violent and property crime rates, national and state percentiles for 3,200+ US cities.

3,212 cities

Source: FBI Uniform Crime Report (2023)

Endpoints

GET/api/v1/safety/cities— All cities

GET/api/v1/safety/city/{state}/{city}— Single city

GET/api/v1/safety/state/{state}— State overview

GET/api/v1/safety/compare/{slug}— Compare two cities

GET/api/v1/safety/safest— Safest cities

Cost of Living

Cost-of-living indices across 6 categories: overall, housing, groceries, transportation, healthcare, and utilities. National average = 100.

200+ cities

Source: BEA Regional Price Parities, C2ER, Census ACS

Endpoints

GET/api/v1/cost-of-living— All cities (JSON)

GET/api/v1/cost-of-living?city={slug}— Single city

GET/api/v1/cost-of-living?state={state}— Filter by state

Download CSV View JSON

Climate & Weather

Monthly climate normals: average high/low temperature, precipitation, snowfall, wind speed, humidity, and sunshine hours.

200+ cities

Source: NOAA, NWS historical weather station data

Endpoints

GET/api/v1/climate— All cities (JSON)

GET/api/v1/climate?city={City, State}— Single city

GET/api/v1/climate?state={state}— Filter by state

Download CSV View JSON

Activity Listings

Verified local activities with real prices, hours, addresses, and constraint data. 6 verticals: kids/family, recreation, entertainment, services, food, dog-friendly.

19 cities

Source: CityCheck verified listings

Endpoints

GET/api/v1/cities— Cities with listings

GET/api/v1/cities/{city}/listings— City listings

GET/api/v1/search?q={query}— Natural language search

Quick Start

No API key needed. Just fetch any endpoint:

Get safety data for Denver

curl https://citycheck.live/api/v1/safety/city/colorado/denver

Compare cost of living

curl https://citycheck.live/api/v1/cost-of-living?city=denver-colorado

Download all climate data as CSV

curl -o climate.csv https://citycheck.live/api/v1/climate?format=csv

License & Attribution

All CityCheck data is available under Creative Commons Attribution 4.0. You are free to use, share, and adapt the data for any purpose, including commercial use. Please attribute CityCheck (citycheck.live) in your work.

Questions about our data? Read our methodology or view data sources.