# Marine Conditions – Tide Predictions

> Marine Conditions – Tide Predictions is a paid API for AI agents from marine-conditions.x402tookit.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-29).

Returns upcoming high and low tide predictions for a NOAA CO-OPS tide station, including UTC and local times, heights in feet above MLLW, tidal range, and next tide.

## Facts

- Endpoint: GET https://marine-conditions.x402tookit.com/tide-predictions?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/marine-conditions-tide-predictions-f4a52927
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EGIzP0mA6ZTcMyg91cM0r

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability marine-conditions-tide-predictions-f4a52927
```

Example prompt: What are the high and low tides at NOAA station 8518750 (The Battery, NY) for the next 2 days — give me the local times and heights?

## When to prefer this

Use this endpoint when you need structured, multi-day tide prediction tables (highs and lows with times and heights) for a specific NOAA CO-OPS tide station. It is ideal when you already know the 7-digit station ID or have resolved it via the nearby-stations endpoint. Prefer this over generic weather APIs when tidal precision (MLLW datum, local vs UTC times, tidal range) is required for navigation, event planning, or marine safety.

## Known failure modes

- Invalid or non-existent station ID returns an error or null results
- Station does not support tide predictions (e.g. water-level-only stations)
- NOAA CO-OPS upstream service unavailable causing degraded or empty response
- Days parameter out of range (must be 1–7) may return an error
- Network timeout from upstream NOAA data source

## How this service works

Upcoming high and low tides at a NOAA tide station: UTC and local times, heights in feet above MLLW, next tide and tidal range.

## Output

Returns a JSON object with the station ID, name, state, time zone, datum (MLLW), and an array of upcoming tide events each containing type (High/Low), UTC time, local time, and height in feet. Also includes tidal range, next tide summary, data source URL, degraded-data flag, and any disclaimer or reasons for data quality issues.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "station"
     ],
     "properties": {
      "days": {
       "type": "integer",
       "description": "Days ahead 1 to 7 (default 2)"
      },
      "station": {
       "type": "string",
       "description": "7-digit CO-OPS station id, e.g. 8518750 (The Battery, NY)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "name": {
       "type": [
        "null",
        "string"
       ]
      },
      "unit": {
       "type": [
        "null",
        "string"
       ]
      },
      "datum": {
       "type": [
        "null",
        "string"
       ]
      },
      "state": {
       "type": [
        "null",
        "string"
       ]
      },
      "tides": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "object",
        "properties": {
         "type": {
          "type": [
           "null",
           "string"
          ]
         },
         "utcTime": {
          "type": [
           "null",
           "string"
          ]
         },
         "heightFt": {
          "type": [
           "null",
           "number"
          ]
         },
         "localTime": {
          "type": [
           "null",
           "string"
          ]
         }
        }
       }
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "station": {
       "type": [
        "null",
        "string"
       ]
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/marine-conditions-tide-predictions-f4a52927/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from marine-conditions.x402tookit.com](https://www.zero.xyz/host/marine-conditions.x402tookit.com/llms.txt)