# greeneris-data Kalshi Prediction Markets

> greeneris-data Kalshi Prediction Markets is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Fetches live Kalshi event contract quotes and implied probabilities from the CFTC-regulated prediction exchange

## Facts

- Endpoint: GET https://data.greeneris.io/v1/predict/kalshi
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/greeneris-data-kalshi-prediction-markets-a3f02310
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_neTJuIjsx58vo5jFDbY3J

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 greeneris-data-kalshi-prediction-markets-a3f02310
```

Example prompt: What's the current implied probability on Kalshi for the Fed keeping rates above 4% after the March 2027 meeting? Show me the top 5 markets in the KXFED series.

## When to prefer this

Use this endpoint when you need live, CFTC-regulated prediction market quotes from Kalshi — particularly for macro events (Fed rate decisions, crypto price levels) where you want market-implied probabilities rather than model forecasts. Prefer over alternatives when you need structured yes/bid, yes/ask, and open interest data for event contracts in a single pay-per-call call with no account required.

## Known failure modes

- HTTP 402 returned if USDC payment via x402 protocol has not been completed — machine-readable quote included in response
- Invalid or unknown series_ticker silently returns empty markets array
- limit out of range (1–25) causes validation error
- Network or upstream Kalshi API outage returns 5xx error

## How this service works

Open markets on Kalshi, the CFTC-regulated US event exchange, most-traded first: ticker, title, live yes bid/ask (USD, 0-1), mid-quote implied probability, 24h volume, open interest and close time, from the public Trade API v2. Query: ?series=KXBTC (optional series_ticker filter, e.g. KXBTC, KXCPIYOY) &limit=1-25 (default 10). JSON, 5min cache. Cross-reference /v1/predict/polymarket for venue spreads.

## Output

Returns a list of up to 25 Kalshi event markets with their tickers, titles, yes/ask and yes/bid prices (in USD 0–1), last traded price, 24h volume, open interest, implied probability, and contract close time. Source is identified as Kalshi Trade API v2 (CFTC-regulated).

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "default": 10,
       "maximum": 25,
       "minimum": 1,
       "description": "Markets to return"
      },
      "series": {
       "type": "string",
       "description": "Kalshi series_ticker filter, e.g. KXBTC (optional)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "series": "KXFED",
  "source": "Kalshi Trade API v2 (CFTC-regulated event exchange, live public quotes, prices in USD 0-1)",
  "markets": [
   {
    "title": "Will the upper bound of the federal funds rate be above 4.00% following the Fed's Mar 17, 2027 meeting?",
    "ticker": "KXFED-27MAR-T4.00",
    "yes_ask": 0.49,
    "yes_bid": 0.03,
    "subtitle": "4.00%",
    "close_time": "2027-03-17T17:55:00Z",
    "last_price": 0.05,
    "volume_24h": 21,
    "implied_prob": 0.26,
    "open_interest": 1305
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/greeneris-data-kalshi-prediction-markets-a3f02310/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.greeneris.io](https://www.zero.xyz/host/data.greeneris.io/llms.txt)