kalshi.market

beta Standard

One Kalshi market by ticker.

GET /v1/kalshi/market

What you get#

One Kalshi record in Onekey's unified shape, in data. If the record does not exist you get a 404 not_found and are not charged.

What it costs#

Standard · 1 credit for a fresh fetch, charged only when it succeeds.
Free when served from cache (0.2 credit for a cached response over 100 KB).
Free if the request is invalid (never charged) or the source fails or reports not found (refunded).

Parameters#

Name	Type	Required	Default	What it is	Constraints
`ticker`	string	yes	(required)	Market ticker	max 80 chars; must match `[A-Za-z0-9._-]{3,80}`; trimmed

Request#

curl "https://api.onekey.dev/v1/kalshi/market?ticker=KXHIGHNY-26SEP29-T80" \
  -H "x-api-key: YOUR_API_KEY"

Try it

Add your key to run this call right here. No key? Get one free. The key stays in this tab.

Recorded response#

A real Kalshi response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": {
    "entity": {
      "id": "KXHIGHNY-26SEP29-T80",
      "name": "Highest temperature in NYC on Sep 29, 2026 above 80?",
      "description": "81 or above",
      "category": "active",
      "date": "2026-09-30T04:59:00Z"
    },
    "ext": {
      "eventTicker": "KXHIGHNY-26SEP29",
      "yesBid": 42,
      "yesAsk": 44
    },
    "market": {
      "price": 43,
      "volume": 12800,
      "volume24h": 3400,
      "openInterest": 5100
    }
  },
  "metadata": {
    "platform": "kalshi",
    "endpoint": "market",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 1,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}

Field mapping#

How this endpoint's source fields become Onekey's unified schema. Fields the source lacks come back as null.

Source path	Onekey field	Transform
`ticker`	`entity.id`	-
`title`	`entity.name`	-
`subtitle`	`entity.description`	-
`event_ticker`	`ext.eventTicker`	-
`status`	`entity.category`	-
`yes_bid`	`ext.yesBid`	`toNumber`
`yes_ask`	`ext.yesAsk`	`toNumber`
`last_price`	`market.price`	`toNumber`
`volume`	`market.volume`	`toNumber`
`volume_24h`	`market.volume24h`	`toNumber`
`open_interest`	`market.openInterest`	`toNumber`
`close_time`	`entity.date`	`toIsoDate`

Caching and freshness#

Fresh for about 30 minutes. Repeat calls in that window are served from cache and are free.
Between 30 minutes and 6 hours the cached copy is still served instantly and marked stale: true while Onekey refreshes it in the background.
If the source is down when a refresh is needed, the last copy can be served for up to 1 day more (marked stale).
A "not found" is remembered for 5 minutes and is free.
The cache is shared across all customers, which is what keeps repeat calls cheap.

What can go wrong#

Status	Code	What to do
401	`unauthorized`	Check the `x-api-key` header.
402	`insufficient_credits`	Add credits; your balance must cover the price.
404	`not_found`	That record does not exist. Free; do not retry.
422	`invalid_params`	Fix the parameters using the table above. Free.
429	`rate_limited`	Wait `Retry-After` seconds, then retry.
502	`upstream_error`	The source failed. Refunded; retry with backoff.

See Errors for the full list and retry guidance.

Status: beta (not yet verified against the live source).