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SiteCheck Tides API
x402
SiteCheck Tides API is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-16).
Returns NOAA tide predictions (high/low water times and heights) for a US coastal station by location or station ID
Price / call$0.002
Success—
StatusUnknown
How this service works
Tide predictions (high and low water, metres above MLLW, UTC times) for 1 to 7 days at the NOAA station nearest a point, or at a station id, from NOAA CO-OPS (US public domain). Give lat and lon, or a place name. Coverage is US coasts, Great Lakes and territories only; a point more than 100 km from a station is a 404, not charged. search=name lists stations.
Output
Returns a JSON object with tide predictions (high/low) for up to 7 days: each prediction includes a UTC timestamp, type (high or low), and height in meters relative to MLLW (mean lower low water). Also includes station metadata (ID, name, state, lat/lon), datum description, total prediction count, and data source attribution. Coverage is US coasts and territories only.
Example use cases
Coastal boating trip planning
“I'm heading out on my boat from Charleston, SC this Saturday and Sunday — can you pull the tide predictions for those 2 days so I know when the inlet is navigable?”
Beach visit timing
“We're going to Ocean City, MD tomorrow and want to hit the beach at low tide — what time is low tide there, and can you give me the full tide schedule for the day?”
Finding nearby NOAA tide stations
“I need to know which NOAA tide stations are near San Francisco Bay — can you search for stations with 'san' in the name and list them for me?”
Technical details
Endpoint
GEThttps://api.sitecheck-api.workers.dev/api/tides?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need authoritative NOAA tide predictions for any US coastal or territorial location. It supports flexible lookup by station ID, place name (geocoded), lat/lon coordinates, or station name search. Prefer this over generic weather APIs when you specifically need tidal high/low cycle times and heights in meters referenced to MLLW datum, especially for boating, fishing, beach planning, or marine operations.
Side effects
- No station found for given place name or coordinates — returns empty or error
- Station ID not recognized — invalid 7-digit NOAA ID returns error
- Search fragment fewer than 3 characters — rejected by validation
- Location outside US coasts/territories — not covered by NOAA CO-OPS
- Days parameter out of range (must be 1–7) — may return error or default
- No input provided (station, place, lat/lon, or search required) — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"days": 2,
"count": 11,
"datum": "MLLW (mean lower low water), metres, times in UTC",
"point": {
"from": "station id"
},
"source": "NOAA CO-OPS Data API (predictions, public domain)",
"station": {
"id": "8518750",
"lat": 40.7006,
"lon": -74.0142,
"name": "NEW YORK (The Battery)",
"state": "NY"
},
"coverage": "US coasts and territories only",
"checkedAt": "2026-10-15T14:00:30.759Z",
"predictions": [
{
"time": "2026-10-15T03:45Z",
"type": "high",
"heightM": 1.277
},
{
"time": "2026-10-15T09:35Z",
"type": "low",
"heightM": 0.321
},
{
"time": "2026-10-15T15:58Z",
"type": "high",
"heightM": 1.5
}
]
}
}Tags
x402
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