M2
Neptun covers M2 (Ireland) through the Marine Institute 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: Marine Institute · Position: 53.4836, -5.4302
Request
curl -H "Authorization: Bearer mapi_YOUR_KEY" \
"https://neptun.marine-api.com/v1/levels?lat=53.4836&lon=-5.4302&radius=5"