Halmstad 2
Neptun covers Halmstad 2 (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: 56.6512, 12.8447
Request
curl -H "Authorization: Bearer mapi_YOUR_KEY" \
"https://neptun.marine-api.com/v1/levels?lat=56.6512&lon=12.8447&radius=5"