---
name: oracle.the-undesirables.com
description: oracle.the-undesirables.com exposes a single endpoint that fetches real-time National Weather Service temperature forecasts and compares them against Kalshi temperature derivative markets across 10 US cities. It returns structured arbitrage signals including per-city forecast-vs-observed divergence, Kelly-sized bet recommendations, and ranked edge opportunities.
host: oracle.the-undesirables.com
---

# oracle.the-undesirables.com

This host is a specialized arbitrage signal oracle targeting weather-based prediction markets on Kalshi. It serves quantitative traders and autonomous agents that want a ready-made, single-shot snapshot of where NWS forecast data diverges from Kalshi temperature derivative pricing. It does not provide general weather data, streaming feeds, or blockchain analytics — its sole function is surfacing actionable edges in temperature derivative markets.

## When to use this host

Use this host when an agent needs a structured, single-shot snapshot of arbitrage opportunities between NWS weather forecasts and Kalshi temperature derivative markets. It is the right choice when the task involves Kelly-criterion bet sizing, per-city forecast divergence analysis, or ranking edges across Kalshi temperature markets. Do not use it for general weather data retrieval (use NWS or a weather API directly), real-time streaming price feeds, Arbitrum or any other blockchain/on-chain data, or prediction markets outside of Kalshi temperature derivatives. Because it has only one skill and no configurable inputs, it is not suitable for targeted city-level queries or custom time horizons — it always returns a full 10-city snapshot.

## Capabilities

### Weather Derivative Arbitrage Signals

Fetches and compares NWS temperature forecasts against Kalshi temperature derivatives for 10 US cities, returning ranked arbitrage edges, divergence metrics, and Kelly-sized position recommendations in a single call.

- **`fetch-arb-weather`** — Compares real-time NWS temperature forecasts against Kalshi temperature derivatives across 10 US cities to surface arbitrage edges and trading signals.

## Skill reference

### `fetch-arb-weather`

**Arb Weather Oracle** — Compares real-time NWS temperature forecasts against Kalshi temperature derivatives across 10 US cities to surface arbitrage edges and trading signals.

*Use when:* Use when an agent needs structured weather-vs-derivatives arbitrage signals, per-city temperature forecast vs observed divergence, Kelly-sized bet recommendations, and ranked edge opportunities across Kalshi temperature markets.

*Not for:* Do not use for general Arbitrum blockchain data or on-chain analytics; this endpoint returns weather derivative arbitrage signals, not blockchain state. Not suitable for real-time streaming price feeds — this is a single-shot snapshot.

**Returns:** Returns a JSON object with status, timestamp, totalMarketsScanned, opportunitiesFound, per-city temperature forecast vs observed summaries, and a ranked edges array with signal, Kelly sizing, and HRRR divergence for each Kalshi temperature market opportunity.

**Example:** `GET https://oracle.the-undesirables.com/api/v1/arb-weather`

---