Geocoding — entry 057 of 80
IsItWater (formerly OnWater)
OnWater.io rebranded to IsItWater.com (a Noreaster Group product); the old onwater.io host now 301-redirects there. It answers whether a given latitude/longitude sits on land or water using OpenStreetMap-derived data, returning JSON with a boolean and a feature list (e.g. "ocean", "lake"). Access requires a Bearer API key with no recurring free tier — signup grants 1,000 one-time free credits, then it's pay-as-you-go from $1 per 2,500 calls with credits that never expire; a live probe shows no CORS header, so it needs a server-side call.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingMeteredBilled per request beyond a limited free quota.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score55
Authentication15/25API key required
Pricing11/20Metered / usage-based pricing
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/onwater/"><img src="https://greatapis.com/badge/onwater.svg" alt="Scored 55 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.