# Vextorium US Weather Forecast

> Vextorium US Weather Forecast is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-19).

Returns current and upcoming weather forecasts for any US location by latitude/longitude, sourced from the US National Weather Service

## Facts

- Endpoint: POST https://api.vextorium.com/v1/us-weather?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-us-weather-forecast-43bdcca0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GefEwlx4ybuOFu4-LCcua

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 vextorium-us-weather-forecast-43bdcca0 -d '<json body>'
```

Example prompt: What's the weather forecast for coordinates 40.7128° N, 74.0060° W — include the rain probability and hourly breakdown if available.

## When to prefer this

Choose this endpoint when you need structured US weather forecasts sourced directly from the authoritative US National Weather Service (NOAA), without needing an API key. It is ideal for US-only location-based weather queries where you have latitude/longitude coordinates and want structured forecast data including precipitation probability, wind, and temperature in both Fahrenheit and Celsius. Prefer this over generic weather APIs when you need official government-sourced data for US locations at a very low per-call cost.

## Known failure modes

- Coordinates outside the US (NWS only covers US territories) — likely returns an error or empty forecast
- Invalid or malformed lat/lon values — schema validation error
- NWS upstream outage — service unavailable or timeout
- Coordinates in remote US areas with no NWS grid coverage — empty or null forecast
- Missing required lat or lon fields — request rejected with validation error

## How this service works

232 pay-per-call data APIs for AI agents: official statistics and economy (ECB, Fed, Eurostat, World Bank, SEC, BOE, INE), crypto prices and sentiment, Spanish public data, compliance (sanctions, VAT, IBAN, LEI), science, weather, web and developer tools and local AI text tools. Pay in USDC via x402.

## Output

A JSON object containing the resolved place name, data source (US National Weather Service), timezone, any active weather warnings, and an array of forecast periods. Each forecast period includes a name (e.g. 'Today', 'Tonight'), temperature in Fahrenheit and Celsius, wind speed and direction, precipitation probability as a percentage, a short summary, and a detailed narrative description. Optionally includes hourly breakdowns.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "place": "New York, NY",
  "source": "US National Weather Service (public domain)",
  "timezone": "America/New_York",
  "warnings": [],
  "forecasts": [
   {
    "name": "Today",
    "unit": "F",
    "wind": "5 to 10 mph SW",
    "start": "2026-10-02T10:00:00-04:00",
    "detail": "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.",
    "summary": "Mostly Sunny then Chance Showers And Thunderstorms",
    "temperature": 83,
    "rain_prob_pct": 35,
    "temperature_c": 28.3
   },
   {
    "name": "Tonight",
    "unit": "F",
    "wind": "9 to 14 mph NW",
    "start": "2026-10-02T18:00:00-04:00",
    "detail": "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.",
    "summary": "Chance Showers And Thunderstorms",
    "temperature": 63,
    "rain_prob_pct": 52,
    "temperature_c": 17.2
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-us-weather-forecast-43bdcca0/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)