api.geoprimitives.dev marine hazards

https://api.geoprimitives.dev/v1/marine/hazards

answers 402

Give it a latitude, a longitude and a radius in metres and it answers with every charted underwater rock, obstruction and wreck inside that circle, nearest first, each with its charted depth, its water level effect, its name where the chart names it, and the geodesic distance from your position. Parameters go in the query string: this is a GET, there is no body. NOT FOR NAVIGATION, stated first be

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.

Price: $0.005
Network: base
Pay to: 0x76A51b5Dd3729950B3b60c17f19252d221968FCe
Spec dialect: v2 (declares x402Version 2)
Transport: PAYMENT-REQUIRED header
HTTP method: GET
Response latency: 987 ms
Payment options: 1 usable of 1
Last checked: 2026-09-06T01:13:20.052Z (2h ago)
Category: finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.geoprimitives.dev%2Fv1%2Fmarine%2Fhazards"