# Kalshi Event Detail with Nested Markets

> Kalshi Event Detail with Nested Markets is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Fetches full details for a single Kalshi prediction market event, including all nested markets and whether they are mutually exclusive

## Facts

- Endpoint: POST https://agent402.tools/api/kalshi-event
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kalshi-event-detail-with-nested-markets-80197c1c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5kh5mcNaghCgjt4E_sEKY

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 kalshi-event-detail-with-nested-markets-80197c1c -d '<json body>'
```

Example prompt: Pull all the markets nested under the Kalshi event with ticker PRES-24 and tell me whether the outcomes are mutually exclusive — I want to see every candidate or outcome bucket listed.

## When to prefer this

Use this endpoint when you need a complete picture of a Kalshi event — all its child markets, their titles, and whether they are mutually exclusive — rather than just a list of top-level events. Ideal for election markets (all candidates), economic indicator markets (all CPI ranges), or any event where understanding the full outcome space matters.

## Known failure modes

- Unknown or invalid eventTicker returns a 404 or error response
- Event ticker exists but has no nested markets (empty markets array)
- Kalshi API unavailable upstream causing a 502 or timeout
- Malformed request body (missing eventTicker field) returns a 400 validation error
- Payment not settled via x402 results in a 402 payment required error

## How this service works

Get full detail for a single Kalshi event with all its nested markets. Mutually-exclusive flag tells you whether the markets partition outcome space (e.g. one winner). Useful for: viewing all candidates in an election, all CPI ranges, all weather buckets.

## Output

Returns full event metadata for the specified Kalshi event, including all nested market objects (each with their own ticker, title, and outcome details), plus a mutually-exclusive flag indicating whether the markets together partition the full outcome space (e.g. exactly one can resolve YES).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "eventTicker": {
   "type": "string",
   "description": "Kalshi event ticker, e.g. PRES-24, CPI-25APR."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "title": "2026 US Presidential election",
  "source": "kalshi",
  "markets": [
   {
    "noAsk": 0.55,
    "noBid": 0.53,
    "title": "Will the Democratic nominee win?",
    "venue": "kalshi",
    "status": "open",
    "ticker": "PRES-24-DEM",
    "volume": 12345,
    "yesAsk": 0.47,
    "yesBid": 0.45,
    "venueUrl": "https://kalshi.com/markets/pres-24-dem",
    "lastPrice": 0.46,
    "eventTicker": "PRES-24",
    "openInterest": 5678
   }
  ],
  "category": "Politics",
  "subTitle": "Who will win?",
  "eventTicker": "PRES-24",
  "marketCount": 2,
  "seriesTicker": "PRES",
  "mutuallyExclusive": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kalshi-event-detail-with-nested-markets-80197c1c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)