Alistro
Neptun covers Alistro (France) through the CANDHIS (Cerema) 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: CANDHIS (Cerema) · Position: 42.2617, 9.6433
Request
curl -H "Authorization: Bearer mapi_YOUR_KEY" \
"https://neptun.marine-api.com/v1/levels?lat=42.2617&lon=9.6433&radius=5"