# RunwayOracle Chicago Midway (KMDW) Runway Temperature Nowcast

> RunwayOracle Chicago Midway (KMDW) Runway Temperature Nowcast is a paid API for AI agents from runwayoracle.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns a calibrated real-time runway-temperature nowcast for Chicago Midway Airport (KMDW) with optional strike probability estimates, using live 3-hour thermal-memory telemetry.

## Facts

- Endpoint: GET https://runwayoracle.com/v1/oracle/v3/mdw-edge
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/runwayoracle-chicago-midway-kmdw-runway-temperature-nowcast-fed9810b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oEHOyZIDphSGMhIWJ_zkC

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 runwayoracle-chicago-midway-kmdw-runway-temperature-nowcast-fed9810b
```

Example prompt: What's the current runway temperature nowcast at Chicago Midway Airport, and what's the calibrated probability that it's above 85°F right now?

## When to prefer this

Use this endpoint when you need a high-accuracy, real-time runway or surface temperature estimate specifically for Chicago Midway Airport (KMDW), especially when calibrated strike probabilities (P above/below a threshold) are needed for weather derivative pricing, aviation planning, or thermal condition monitoring. Prefer this over generic weather APIs when pavement/runway thermal specificity and calibrated probabilistic outputs matter.

## Known failure modes

- Live telemetry unavailable — falls back to degraded model with OOS RMSE of 1.72°F
- Invalid strikeF value outside the -80 to 140°F range — likely returns validation error
- Payment not accepted (x402 protocol) — returns 402 Payment Required
- Network timeout or service unavailable — returns 5xx error

## How this service works

Chicago weather forecast API: live temperature nowcast and daily high forecast for Chicago Midway (KMDW), with calibrated probability the temperature ends above/below any Fahrenheit strike. KMDW is the official settlement station for Kalshi KXHIGHCHI and Polymarket Chicago daily high temperature prediction markets. Built for AI agents trading weather prediction markets or needing real-time weather data. $0.05 with live 3h thermal-memory telemetry (out-of-sample nowcast RMSE 0.94F); $0.01 degraded fallback (RMSE 1.21F). Free catalog: https://runwayoracle.com/catalog.json. Model-conditional estimates; not financial advice.

## Output

Returns a real-time runway temperature nowcast for KMDW (Chicago Midway) with an out-of-sample RMSE of 1.09°F (live telemetry) or 1.72°F (degraded fallback), plus optional calibrated P(above) and P(below) strike probabilities if a strikeF parameter was provided. Includes thermal-memory telemetry metadata.

## 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",
     "required": [],
     "properties": {
      "strikeF": {
       "type": "number",
       "description": "Optional strike temperature in degrees F (-80..140); response then includes calibrated P(above)/P(below)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/runwayoracle-chicago-midway-kmdw-runway-temperature-nowcast-fed9810b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from runwayoracle.com](https://www.zero.xyz/host/runwayoracle.com/llms.txt)