IsItWater
FreemiumLiveLast verified 24 Sept 2026
Tells you whether a latitude/longitude point is on water or land, using OpenStreetMap data.
Example request
curl -G 'https://api.isitwater.com/v1/locations/water' -d 'latitude=41.9029192' -d 'longitude=-70.2652276' -H "Authorization: Bearer $API_KEY"
Free tier, in plain English
New accounts get 1,000 free credits; after that it's credit-based pay-as-you-go with no subscription.
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