# Maxwell International Weather Gridpoint API

> Maxwell International Weather Gridpoint API is a paid API for AI agents from api.maxwellinternational.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Returns official NWS gridpoint weather data including temperature and snowfall forecasts for a specific geographic grid cell

## Facts

- Endpoint: GET https://api.maxwellinternational.ai/v1/weather/gridpoint?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/maxwell-international-weather-gridpoint-api-fa62b908
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hCG5WifCoUMjRdA8cc6Tq

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 maxwell-international-weather-gridpoint-api-fa62b908
```

Example prompt: What are the temperature and snowfall forecasts for the NWS Boulder office grid point at X=63, Y=62 in Colorado?

## When to prefer this

Choose this endpoint when you need official US government NWS gridpoint weather data with time-series temperature and snowfall forecasts tied to a specific grid cell, especially when you already know the WFO office and grid coordinates. It is ideal for geospatial pipelines or location-aware agents that need authoritative forecast data at a sub-regional grid resolution rather than city-level approximations.

## Known failure modes

- Invalid or out-of-range grid coordinates return an error or empty values array
- Unsupported WFO office code may return not-found response
- NWS upstream API outage may cause stale or missing data
- Missing required query parameters returns schema validation error
- Payment failure (x402) blocks access before data is returned

## How this service works

NWS quantitative gridded forecast for a US point: time series for temperature, dewpoint, humidity, wind and gusts, sky cover, precipitation probability and amount, snowfall, ice, snow level, visibility, thunder probability, weather and hazards (about 7 days). Filter with fields= and hours=. 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 the WFO office code, grid X/Y coordinates, state and country, elevation in meters, and layered forecast data (temperature in degC and snowfall amount in mm) as time-series arrays keyed by ISO 8601 start/duration intervals, along with generation and update timestamps.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "weather.gridpoint",
  "wfo": "BOU",
  "gridX": 63,
  "gridY": 62,
  "state": "Colorado",
  "layers": {
   "temperature": {
    "uom": "degC",
    "values": []
   },
   "snowfallAmount": {
    "uom": "mm",
    "values": []
   }
  },
  "country": "United States",
  "updatedAt": "2026-09-26T06:46:32+00:00",
  "elevationM": 1587.0936,
  "timeFormat": "validTime is ISO 8601 start/duration (e.g. 2026-09-26T06:00:00+00:00/PT3H)",
  "generatedAt": "2026-09-26T07:40:15.716Z",
  "sourceClass": "official-api"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/maxwell-international-weather-gridpoint-api-fa62b908/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.maxwellinternational.ai](https://www.zero.xyz/host/api.maxwellinternational.ai/llms.txt)