Tools (5)

get_tide_predictions
get_water_levels
get_station_data
search_stations
report_feedback

get_tide_predictions

Get tide predictions for a NOAA CO-OPS station.

Returns predicted high/low tide times and heights, or water level predictions
at regular intervals. Use 'hilo' interval for high/low tide times, or a numeric
interval for evenly-spaced predictions.

Args:
station: NOAA station identifier.
begin_date: Start date (yyyyMMdd).
end_date: End date (yyyyMMdd).
datum: Tidal datum reference level.
interval: Prediction granularity.
units: Measurement units.

Returns:
Predictions with time, value (water level), and type (high/low if hilo).

Parameter	Type	Required	Description
`station`	`string`	required	NOAA station ID (e.g. '9414290' for San Francisco, '8518750' for The Battery NYC).
`begin_date`	`string`	required	Start date in yyyyMMdd format (e.g. '20260320').
`end_date`	`string`	required	End date in yyyyMMdd format (e.g. '20260321'). Max 1 year for high/low.
`datum`	`string`	optional	Tidal datum reference. Common: MLLW (default), MSL, NAVD, MHHW. (default: "MLLW")
`interval`	`string`	optional	Prediction interval: 'hilo' for high/low only, 'h' for hourly, or minutes (1,5,6,10,15,30,60). (default: "hilo")
`units`	`string`	optional	Units: 'metric' (meters, Celsius) or 'english' (feet, Fahrenheit). (default: "metric")

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "get_tide_predictions",
    "arguments": {
      "station": "example",
      "begin_date": "example",
      "end_date": "example"
    }
  }
}

get_water_levels

Get observed (actual) water level data from a NOAA tide station.

Returns real-time or historical water level observations at 6-minute intervals.
Compare with predictions to see storm surge, wind effects, or other anomalies.

Args:
station: NOAA station identifier.
begin_date: Start date (yyyyMMdd).
end_date: End date (yyyyMMdd).
datum: Tidal datum reference level.
units: Measurement units.

Returns:
Observations with time, value (water level), sigma (std dev), and quality flag.

Parameter	Type	Required	Description
`station`	`string`	required	NOAA station ID (e.g. '9414290' for San Francisco).
`begin_date`	`string`	required	Start date in yyyyMMdd format.
`end_date`	`string`	required	End date in yyyyMMdd format. Max 1 month for 6-minute data.
`datum`	`string`	optional	Tidal datum reference. Common: MLLW (default), MSL, NAVD. (default: "MLLW")
`units`	`string`	optional	Units: 'metric' or 'english'. (default: "metric")

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "get_water_levels",
    "arguments": {
      "station": "example",
      "begin_date": "example",
      "end_date": "example"
    }
  }
}

get_station_data

Get meteorological observations from a NOAA coastal station.

Retrieves current or recent readings for water temperature, air temperature,
wind speed/direction, barometric pressure, and other environmental parameters.

Args:
station: NOAA station identifier.
product: Type of meteorological data.
date: Time filter.
units: Measurement units.

Returns:
Readings with time and measured values (varies by product).

Parameter	Type	Required	Description
`station`	`string`	required	NOAA station ID (e.g. '9414290').
`product`	`string`	required	Data product: 'water_temperature', 'air_temperature', 'wind', 'air_pressure', 'humidity'.
`date`	`string`	optional	Date filter: 'latest' for most recent, 'today', 'recent' (last 72h). (default: "latest")
`units`	`string`	optional	Units: 'metric' or 'english'. (default: "metric")

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "get_station_data",
    "arguments": {
      "station": "example",
      "product": "example"
    }
  }
}

search_stations

Search for NOAA tide prediction stations.

Find stations by US state. Returns station IDs, names, and coordinates
that can be used with other tide tools.

Args:
state: US state abbreviation to filter by.
max_results: Maximum results.

Returns:
List of stations with id, name, state, latitude, longitude.

Parameter	Type	Required	Description
`state`	`any`	optional	Filter by US state abbreviation (e.g. 'CA', 'NY', 'FL').
`max_results`	`integer`	optional	Maximum number of stations to return (1-500). (default: 50)

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "search_stations",
    "arguments": {}
  }
}

report_feedback

Report a bug, feature request, or general feedback for this data source.

Use this when something doesn't work as expected, when you'd like
a new feature, or when you have suggestions for improvement.

Args:
feedback: Describe the issue or suggestion.
feedback_type: One of 'bug', 'feature_request', or 'general'.

Parameter	Type	Required	Description
`feedback`	`string`	required
`feedback_type`	`string`	optional	(default: "general")

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "report_feedback",
    "arguments": {
      "feedback": "example"
    }
  }
}

Quick Start

Shell

curl -X POST "https://context.gnist.ai/mcp/noaa-tides/" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Gnist-API-Key: YOUR_API_KEY" \
  -d '{"jsonrpc": "2.0", "method": "tools/call", "id": 1, "params": {"name": "get_tide_predictions", "arguments": {"station": "example", "begin_date": "example", "end_date": "example"}}}'

Python

import httpx

resp = httpx.post(
    "https://context.gnist.ai/mcp/noaa-tides/",
    headers={"Gnist-API-Key": "YOUR_API_KEY", "Content-Type": "application/json"},
    json={
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "get_tide_predictions",
    "arguments": {
      "station": "example",
      "begin_date": "example",
      "end_date": "example"
    }
  }
},
)
print(resp.json())