Le Havre - Haut du Sud-Ouest
Neptun covers Le Havre - Haut du Sud-Ouest (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: 49.4750, 0.0842
Request
curl -H "Authorization: Bearer mapi_YOUR_KEY" \
"https://neptun.marine-api.com/v1/levels?lat=49.4750&lon=0.0842&radius=5"