# Seoul Weather API — Forecast

> Seoul Weather API — Forecast is a paid API for AI agents from seoul-weather-402.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Returns real-time and forecast weather data for Seoul, South Korea, sourced from the Korea Meteorological Administration (KMA)

## Facts

- Endpoint: GET https://seoul-weather-402.fly.dev/weather/seoul/forecast?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/seoul-weather-api-forecast-279cad44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j-5DnrfB1lMFs4-7CbCKj

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 seoul-weather-api-forecast-279cad44
```

Example prompt: What's the weather forecast for Seoul this week — I want to know the sky conditions, temperature, and chance of rain for each day?

## When to prefer this

Use this endpoint when you specifically need weather forecast data for Seoul, South Korea, especially when you want data sourced from the official Korea Meteorological Administration. Ideal for travel planning apps, tourism services, or agents helping users prepare for a visit to Seoul. Prefer this over generic global weather APIs when Seoul-specific KMA data authority matters.

## Known failure modes

- Payment failure: x402 payment not processed, returns 402 Payment Required
- KMA data unavailable: upstream Korea Meteorological Administration outage returns error
- Rate limiting or network timeout from the fly.dev host
- Malformed response if KMA data format changes unexpectedly

## How this service works

Seoul 3-day forecast — temperature, sky, rain chance every 3 hours

## Output

A JSON object containing an array of forecast periods for Seoul, each with a date, sky condition description (e.g. 'Mostly Cloudy'), temperature in Celsius, and precipitation chance percentage. Also includes a location label ('Seoul, South Korea').

## Example request

```json
{
 "properties": "temperature,humidity,windSpeed,precipitation"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "periods": [
   {
    "sky": "Mostly Cloudy",
    "date": "2026-06-02",
    "temperature": {
     "celsius": 28
    },
    "precipitationChance": "20%"
   }
  ],
  "location": "Seoul, South Korea"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/seoul-weather-api-forecast-279cad44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from seoul-weather-402.fly.dev](https://www.zero.xyz/host/seoul-weather-402.fly.dev/llms.txt)