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Start free. No card, and often no key.
The Antarctica Open API is fully keyless, the Census Intelligence API answers 500 requests a day without a key, and PropData and PropSports expose keyless sample routes so you can see real responses before you subscribe.
US Census Intelligence API
API product
ACS demographics, income, housing and employment by ZIP, county and state.
Free · free tier
Antarctica Open API
Free API
Keyless Antarctic stations, geography, sea ice, live weather and wildlife.
Free · no key
PropData U.S. Property API
API product
Resolve any U.S. address, parcel or coordinate into production property intelligence.
FROM
$79/mo
PropSports API
API product
One key for MLB, NFL, NBA, WNBA, NHL, tennis, soccer and golf.
FROM
$29/mo
UFC Intelligence API
API product
Fighters, cards, bout stats, Fight DNA and Matchup DNA for MMA products.
Request access · from $79/mo
Market Intelligence
Included capability
ZIP, state, rent and listing-market signals.
Included with PropData U.S. Property API
PropData MCP Connector
Included capability
Give Claude, ChatGPT, Cursor and any MCP client live U.S. property intelligence.
Included with PropData U.S. Property API