Göteborg-Krossholmen
Neptun covers Göteborg-Krossholmen (Sweden) through the SMHI network. One GET request returns its readings as JSON — in the same shape as every other network Neptun serves, so you write the parsing once.
Source: SMHI · Position: 57.6913, 11.7712
Request
curl -H "Authorization: Bearer mapi_YOUR_KEY" \
"https://neptun.marine-api.com/v1/levels?lat=57.6913&lon=11.7712&radius=5"