/api/v1/public/markets/{id}GETLive single-market detail with enriched static metadata and the latest available quote.
Response
200 · Market detail
market_id *string
Canonical identifier for the market, formed as
<platform>:<venue ticker> (for example kalshi:SENATEPA-26-R). This is the id every other endpoint accepts, so use it rather than ticker when looking a market up.ticker *string
The venue's own symbol for the market, without the
<platform>: prefix. Not guaranteed unique across venues, so use market_id as the lookup key and display_ticker as the human-readable label.display_ticker *string
Human-readable market label — Polymarket market slug when present, else the raw ticker.
platform *string
The venue that lists this market:
kalshi or polymarket. It is also the prefix of market_id, and it determines what the volume and open interest figures are counted in (see the companion volume_unit, volume_24h_unit, and open_interest_unit fields).question?stringnull
The market's question, worded as the venue words it. When a venue supplies no title we fall back to the raw ticker, so this is never empty.
description?stringnull
Longer explanatory text for the contract as supplied by the venue (Kalshi's subtitle, Polymarket's description). Frequently absent, especially on Kalshi.
probability?numbernull
Implied yes-side probability on the 0-100 scale, where 48.5 means 48.5 percent. This is the market's latest traded price.
volume?numbernull
All-time traded volume as a contract/share count (Kalshi contracts, Polymarket shares), not dollars. Unit is in
volume_unit.volume_unit?object | null
Wire unit for
volume. See QuantityUnit.volume_24h?numbernull
Trailing 24h volume. Platform-native: Kalshi contracts, Polymarket USD. Unit is in
volume_24h_unit.volume_24h_unit?object | null
Wire unit for
volume_24h. See QuantityUnit.open_interest?numbernull
Open interest: a Kalshi contract count; Polymarket's is USD. Unit is in
open_interest_unit.open_interest_unit?object | null
Wire unit for
open_interest. See QuantityUnit.yes_bid?numbernull
Latest top-of-book YES bid (0-100 cents, ~1-min fresh).
yes_ask?numbernull
Latest top-of-book YES ask (0-100 cents, ~1-min fresh).
no_bid?numbernull
Derived NO bid (100 - yes_ask).
no_ask?numbernull
Derived NO ask (100 - yes_bid).
event_ticker?stringnull
Raw venue event ticker (unprefixed).
status?stringnull
Lifecycle state of the market:
active (trading), closed (trading has ended, outcome not yet published), resolved (settled with a known outcome), expired (ended long ago and never settled by the venue), or unknown (the venue reported no status we recognize).open_time?string,null (date-time)
When the market opened for trading on the venue. Static once set, and absent for venues that do not report an open time.
end_date?string,null (date-time)
When trading closes on the venue. This is not the settlement time; a market can sit in
closed for a while before it resolves, so see expiration_date for the expected settlement.expiration_date?string,null (date-time)
Expected settlement time as published by the venue. Distinct from
end_date, which is when trading closes; a market sits between the two while awaiting its outcome.link?stringnull
URL of the venue's public page for this contract, which on both venues is the parent event page rather than a single strike. Null when no working URL can be built, which happens for Kalshi markets whose series is unknown.
category?stringnull
Topic category of this market's parent event, normalized across venues (for example
Politics, Sports, Crypto). Every market under the same event shares it.state_code?stringnull
Two-letter US state code parsed from the ticker when the contract is tied to a state (Senate, Governor, House). Absent for contracts with no state, including Mayoral markets, which carry
city_code instead.city_code?stringnull
Mayoral city code parsed at ingest; present for Mayoral markets, absent otherwise.
market_type?stringnull
The venue's own contract-type label (for example a binary or scalar market). Static contract metadata, absent when the venue reports none.
rules_primary?stringnull
The venue's primary settlement rules text, describing what resolves the contract YES.
rules_secondary?stringnull
Additional settlement rules text from the venue, covering edge cases and sourcing. Frequently absent.
yes_sub_title?stringnull
Short label for the YES leg as the venue words it, suitable for a button or leg header.
no_sub_title?stringnull
Short label for the NO leg as the venue words it, suitable for a button or leg header.
settlement?objectnull
Resolution provenance — platform-agnostic (Kalshi series object / Polymarket resolution_source).
404 · Market not found
error?string
Stable, machine-readable code identifying the failure; branch on this rather than on
message. One of bad_request, unauthorized, forbidden, not_found, conflict, service_unavailable, upstream_error, service_error, or internal_error.message?string
Human-readable explanation, safe to show to a user. For client errors it names the specific problem; for server-side failures it is a generic notice and the underlying detail is deliberately withheld.
Request example
curl -X GET "https://api.dev.adjacent.markets/api/v1/public/markets/<id>"
Response example
{ "market_id": "kalshi:KXPRESPARTY-2028-D", "ticker": "KXPRESPARTY-2028-D", "display_ticker": "KXPRESPARTY-2028-D", "platform": "kalshi", "question": "Will Democratic win the Presidency in 2028?", "probability": 58, "volume": 233444.98, "volume_unit": "contracts", "volume_24h": 14.2, "volume_24h_unit": "contracts", "open_interest": 116538.21, "open_interest_unit": "contracts", "yes_bid": 57, "yes_ask": 58, "no_bid": 42, "no_ask": 43, "event_ticker": "KXPRESPARTY-2028", "status": "active", "open_time": "2024-11-06T15:00:00Z", "end_date": "2029-11-07T15:00:00Z", "expiration_date": "2029-01-21T15:00:00Z", "link": "https://kalshi.com/markets/kxpresparty/kxpresparty-2028", "category": "Elections", "market_type": "binary" }