Les Pierres Noires
Neptun covers Les Pierres Noires (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: 48.2903, -4.9683
Request
curl -H "Authorization: Bearer mapi_YOUR_KEY" \
"https://neptun.marine-api.com/v1/levels?lat=48.2903&lon=-4.9683&radius=5"