# Weather Oracle API — Probabilistic Temperature Forecast

> Weather Oracle API — Probabilistic Temperature Forecast is a paid API for AI agents from 91-197-235-206.sslip.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns a probabilistic daily max-temperature forecast (mean and uncertainty) for a given ICAO weather station city, paid per request via x402/USDC on Base.

## Facts

- Endpoint: GET https://91-197-235-206.sslip.io/forecast/SBGR/point
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/weather-oracle-api-probabilistic-temperature-forecast-6087e992
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cnhuG1xldIk_YCtu_L1iz

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 weather-oracle-api-probabilistic-temperature-forecast-6087e992
```

Example prompt: What's the probabilistic daily max temperature forecast for São Paulo (SBGR) today — give me the point estimate and the 80% confidence interval?

## When to prefer this

Choose this endpoint when you need a calibrated, probabilistic (not just point) daily max-temperature forecast specifically for one of the 51 cities covered by Polymarket weather prediction markets, and you want pay-per-call pricing with no account or API key setup. Prefer it over general weather APIs when uncertainty quantification (sigma and confidence intervals) and Polymarket alignment are important, such as when informing prediction market trades or automated decision systems.

## Known failure modes

- Invalid or unsupported ICAO station code — only the 51 Polymarket-covered cities are supported; returns an error for others
- Date out of range — only today and tomorrow (city-local time) are valid; past or far-future dates are rejected
- Payment failure — insufficient USDC balance or x402 payment not accepted; request returns 402
- Hourly refresh lag — forecast data may be up to ~1 hour stale if requested immediately after scheduled refresh
- Network/SSL error — bare IP with sslip.io TLS; certificate issues possible on some clients

## How this service works

Probabilistic daily max-temperature forecasts for the 51 cities behind Polymarket weather markets. Multi-model ensemble with per-model seasonal bias correction, refreshed hourly. Pay per request in USDC on Base via x402 — no accounts, no API keys.

## Output

A JSON object containing: the point forecast in Celsius (point_c), the standard deviation / uncertainty (sigma_c), the station ICAO code, the market unit (C or F), the target date, and the 80% prediction interval as a two-element array [low, high] in Celsius.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method",
    "pathParams"
   ],
   "properties": {
    "method": {
     "type": "string",
     "const": "GET"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "station"
     ],
     "properties": {
      "station": {
       "type": "string",
       "description": "ICAO station code (e.g. SBGR = Sao Paulo, KNYC = New York). Full catalog at /markets (free)."
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "date": {
       "type": "string",
       "format": "date",
       "description": "Target date YYYY-MM-DD (today or tomorrow, city-local). Defaults to today."
      }
     }
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "point_c": 24.3,
 "sigma_c": 3.9,
 "station": "SBGR",
 "market_unit": "C",
 "target_date": "2026-08-14",
 "interval80_c": [
  19.3,
  29.4
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/weather-oracle-api-probabilistic-temperature-forecast-6087e992/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 91-197-235-206.sslip.io](https://www.zero.xyz/host/91-197-235-206.sslip.io/llms.txt)