# Polyform Hourly Weather Forecast

> Polyform Hourly Weather Forecast is a paid API for AI agents from api.polyform.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-10).

Returns an hour-by-hour weather forecast for any US coordinate for the next 48 hours, sourced from the National Weather Service

## Facts

- Endpoint: GET https://api.polyform.org/v1/weather/hourly?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polyform-hourly-weather-forecast-1140b692
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vVMFpnd0CIFJXATHfPE0K

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 polyform-hourly-weather-forecast-1140b692
```

Example prompt: What's the hour-by-hour weather forecast for Nashville, TN — I need temperatures, precipitation chances, and wind conditions for the next 48 hours so I can plan accordingly.

## When to prefer this

Choose this endpoint when you need granular, hour-by-hour weather resolution for US locations over the next 48 hours — ideal for event planning, logistics, outdoor scheduling, or any use case requiring intraday weather timing. Prefer this over a daily or 7-day forecast endpoint when the hour-of-day matters. Since it sources directly from the National Weather Service, it is authoritative for US locations. Use the sibling current-conditions endpoint if you need observed (real-time) data rather than a forecast.

## Known failure modes

- Coordinates outside the continental US or US territories will fail — NWS only covers US locations
- Missing or malformed lat/lon query parameters will return a 400 error
- NWS upstream outages may cause 502 or 503 responses
- Payment not included or insufficient USDC balance results in 402 Payment Required response
- Very remote US coordinates may not map to a NWS grid point, returning a location resolution error

## How this service works

Hour-by-hour forecast for any US coordinate: temperature, precipitation chance, wind, conditions for the next 48 hours. Source: National Weather Service. JSON.

## Output

A JSON array of hourly forecast objects for the next 48 hours, each containing a timestamp, temperature (in °F), short forecast description (e.g. 'Partly Cloudy'), and precipitation chance percentage. Also includes a resolved location name string for the queried coordinate.

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "hours": [
   {
    "time": "…",
    "temperature": 74,
    "shortForecast": "Partly Cloudy",
    "precipChancePct": 20
   }
  ],
  "location": "Nashville, TN"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polyform-hourly-weather-forecast-1140b692/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.polyform.org](https://www.zero.xyz/host/api.polyform.org/llms.txt)