# US National Weather Service Forecast (Vextorium)

> US National Weather Service Forecast (Vextorium) is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-16).

Returns the official NWS 7-day or hourly weather forecast for any US coordinate pair, including temperature in °F and °C, wind, precipitation probability, and active weather alerts.

## Facts

- Endpoint: POST https://api.vextorium.com/tiempo-eeuu-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-national-weather-service-forecast-vextorium-c2384e8e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wC2ge15CoREaJHrPOc6fe

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 us-national-weather-service-forecast-vextorium-c2384e8e -d '<json body>'
```

Example prompt: What's the 7-day weather forecast for coordinates 40.7128, -74.0060 in the US — give me temperature in both Fahrenheit and Celsius, wind, and any active weather alerts?

## When to prefer this

Choose this endpoint when you need official US government NWS forecast data for a specific US coordinate, especially when authoritative accuracy, precipitation probability, wind details, and weather alerts are needed. Prefer over general weather APIs when the source credibility (NWS/NOAA) matters or when you need both °F and °C without conversion. Not suitable for locations outside the United States.

## Known failure modes

- Coordinates outside the United States return no data or an error (NWS only covers US territory)
- Invalid or out-of-range latitude/longitude values return a validation error
- NWS upstream API downtime may result in a service unavailable response
- Missing required lat or lon fields returns a schema validation error

## How this service works

Official US National Weather Service forecast for coordinates in the United States: next 7 days or hourly, temperature (F and C), wind, chance of rain, plus active weather alerts.

## Output

Returns a JSON object with the location name, timezone, an array of forecast periods (each with start time, period name, temperature in °F and °C, wind description, precipitation probability percentage, short summary, and detailed text), plus an array of any active weather alerts for that location.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "lat": {
   "type": "number"
  },
  "lon": {
   "type": "number"
  },
  "horas": {
   "type": "boolean",
   "description": "Hourly forecast"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "lugar": "New York, NY",
  "avisos": [],
  "fuente": "National Weather Service de EE. UU. (dominio público)",
  "previsiones": [
   {
    "inicio": "2026-10-02T10:00:00-04:00",
    "nombre": "Today",
    "unidad": "F",
    "viento": "5 to 10 mph SW",
    "detalle": "A chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 83. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.",
    "resumen": "Mostly Sunny then Chance Showers And Thunderstorms",
    "temperatura": 83,
    "temperatura_c": 28.3,
    "prob_lluvia_pct": 35
   },
   {
    "inicio": "2026-10-02T18:00:00-04:00",
    "nombre": "Tonight",
    "unidad": "F",
    "viento": "9 to 14 mph NW",
    "detalle": "A chance of showers and thunderstorms before 2am. Mostly cloudy. Low around 63, with temperatures rising to around 65 overnight. Northwest wind 9 to 14 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.",
    "resumen": "Chance Showers And Thunderstorms",
    "temperatura": 63,
    "temperatura_c": 17.2,
    "prob_lluvia_pct": 52
   }
  ],
  "zona_horaria": "America/New_York"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-national-weather-service-forecast-vextorium-c2384e8e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)