# Weather Edge Scanner: NWS Forecast vs Kalshi Temperature Derivatives

> Weather Edge Scanner: NWS Forecast vs Kalshi Temperature Derivatives is a paid API for AI agents from oracle.the-undesirables.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Scans for arbitrage opportunities between National Weather Service temperature forecasts and Kalshi weather derivative markets

## Facts

- Endpoint: GET https://oracle.the-undesirables.com/api/v1/arb-weather
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/oracle-the-undesirables-com-387874cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ufOwIfkeYvoJ3Ri6jJYVa

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 oracle-the-undesirables-com-387874cf
```

Example prompt: Scan for arbitrage opportunities right now between NWS temperature forecasts and Kalshi weather derivative markets — show me any mispriced contracts where the forecast meaningfully diverges from the current Kalshi pricing.

## When to prefer this

Use this endpoint when you want automated, real-time detection of mispricings between official NWS meteorological forecasts and Kalshi's temperature derivative contracts. Prefer this over manual comparison or general prediction market scanners when specifically targeting weather-based financial instruments on Kalshi.

## Known failure modes

- NWS API unavailable — returns error with no opportunities
- Kalshi API rate limit or downtime — partial or empty opportunities array
- No arbitrage detected — returns empty opportunities array with success status
- Payment not included or invalid x402 payment — returns 402 Payment Required
- Upstream data staleness causing false positives in opportunity detection

## How this service works

TCG card grading, conformal risk forecasting, and market intelligence. Powered by x402 micropayments — USDC on Base, USDC on Solana, or USDG on Robinhood Chain; the 402 offers all three and the agent picks a leg. Free tools require no payment. Paid tools return HTTP 402 — sign a payment and retry with the payment proof header.

## Output

Returns a JSON object with a status field, a scan_type identifying the arbitrage strategy used, and an array of opportunities listing detected discrepancies between NWS forecast temperatures and Kalshi derivative prices that may represent exploitable edges.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "ok",
  "scan_type": "weather",
  "opportunities": [
   {
    "city": "Miami, FL",
    "edge": 0.12
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/oracle-the-undesirables-com-387874cf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracle.the-undesirables.com](https://www.zero.xyz/host/oracle.the-undesirables.com/llms.txt)