Mainz
Neptun covers Mainz (Germany) through the PEGELONLINE (WSV) 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: PEGELONLINE (WSV) · Position: 50.0040, 8.2753
Values at build time
| water level | 1.34 m |
Snapshot taken at build time: 14.09.2026 10:00 UTC. Query the API for live values.
Request
curl -H "Authorization: Bearer mapi_YOUR_KEY" \
"https://neptun.marine-api.com/v1/levels?lat=50.0040&lon=8.2753&radius=5"