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API Terms/Geo & Location/OnWater / IsItWater

OnWater / IsItWater

onwater.io

A REST API that returns whether a given latitude and longitude coordinate is on water or land.

The OnWater / IsItWater API uses bearer token authentication; has usage based pricing; offers a free tier (1,000 free credits on signup). Verified 2026-07-12 with per-field source links.

Geo & Location Verified 2026-07-12 medium confidence
Base URL
https://api.isitwater.com/v1
isitwater.com ↗
Auth
bearer_token
isitwater.com ↗
Free tier
1,000 free credits on signup
isitwater.com ↗
Pricing model
usage_based
isitwater.com ↗
Pricing
Pay-as-you-go, starting at $1 for 2,500 API calls, as low as $0.15 per 1,000 calls; credits never expire; no subscriptions
isitwater.com ↗
Rate limits
not documented null
no source
OpenAPI spec
not documented null
no source
MCP server
not documented null
no source