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Maxwell International Weather Forecast API
x402
Maxwell International Weather Forecast API is a paid API for AI agents from api.maxwellinternational.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-30).
Returns a multi-period weather forecast (temperature, wind, conditions) for a given location using official NWS grid data
Price / call$0.005
Success—
StatusUnknown
How this service works
NWS daily/period forecast (about 7 days, day and night periods) for a US point or grid. From the NWS (US and territories), cached and refreshed about every 3 hours; a location not yet cached answers 404, is not charged, and is queued.
Output
Returns a JSON object containing multiple forecast periods (e.g. Tonight, Tomorrow, Tomorrow Night), each with start/end times, daytime flag, temperature in °F and °C, wind speed and direction, short forecast summary, and detailed forecast text. Also includes NWS WFO office code, grid coordinates (gridX/gridY), state, country, cache hit/miss status, and generation timestamp. Source class indicates official NWS API data resolved from lat/lon.
Example use cases
Outdoor event planning weather check
“I'm planning an outdoor concert in Boulder, Colorado this Saturday. Can you pull the official NWS weather forecast for 40.015°N, 105.27°W and tell me the temperature, wind conditions, and whether it'll be clear or rainy for the evening periods?”
Packing forecast for upcoming travel
“I'm flying into Denver next week and want to know what the weather will be like. Fetch the forecast for 39.8561°N, 104.6737°W and give me the temperature highs and lows and wind conditions for each period.”
Agricultural frost risk monitoring
“Can you check the overnight low temperature forecast for my farm location at 40.1°N, 103.5°W in eastern Colorado? I need the temperature in Fahrenheit and the detailed forecast text for the overnight periods to decide if I need to protect my crops.”
Technical details
Endpoint
GEThttps://api.maxwellinternational.ai/v1/weather/forecast?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need official US National Weather Service forecast data resolved from latitude/longitude coordinates, with structured multi-period forecasts including both Fahrenheit and Celsius temperatures, wind details, and human-readable forecast text. Prefer this over general weather APIs when NWS authority and official forecast grid data are required, or when building US-focused weather-dependent decision systems.
Side effects
- Coordinates outside NWS coverage area (non-US locations) may return no forecast data
- NWS upstream API outage causing failed grid resolution
- Cache miss with slow upstream response
- Invalid or missing query parameters returning 400 error
- Coordinates in ocean or non-continental US grid areas returning no WFO match
- Payment failure (402) if x402 micropayment not processed correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"sku": "weather.forecast",
"wfo": "BOU",
"cache": "hit",
"gridX": 63,
"gridY": 62,
"state": "Colorado",
"country": "United States",
"periods": [
{
"name": "Tonight",
"endTime": "2026-09-26T06:00:00-06:00",
"isDaytime": false,
"startTime": "2026-09-25T21:00:00-06:00",
"windSpeed": "5 to 8 mph",
"temperature": 53,
"temperatureC": 11.7,
"shortForecast": "Mostly Clear",
"windDirection": "SSW",
"temperatureUnit": "F",
"detailedForecast": "Mostly clear. Low around 53, with temperatures rising to around 55 overnight...."
}
],
"updatedAt": null,
"generatedAt": "2026-09-26T03:52:17.125Z",
"sourceClass": "official-api",
"resolvedFrom": "latlon"
}
}Tags
x402
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