Agent-readable docs index: /llms.txt. Full docs in one file: /llms-full.txt. Download /docs.zip to grep all markdown files locally.
/api/v1/public/eventsGET
The public markets snapshot collapsed into parent events. Paginates over events; each carries summed volume / open_interest, a market_count, and its child markets embedded — so the markets/search UI can render a multi-strike event as one expandable row without re-deriving the grouping client-side. Grouping, aggregation, and pagination are all server-side; an event's children never split across a page boundary.
Query Parameters
scope?"constituents" | "all"
constituents (default) returns events with at least one constituent market; all returns every event.
Default: "constituents"
search?string
Case-insensitive, all-words match (every whitespace-separated token must match) over event title, a member market's series title, and event_id.
sort?"title" | "volume" | "open_interest" | "market_count"
Sort key (event-level aggregate).
Default: "title"
sort_dir?"asc" | "desc"
Sort direction.
Default: "asc"
page?integer
Page number (1-based).
Default: 1
per_page?integer
Events per page (clamped to 500).
Default: 100Max: 500
status?string
Market status filter applied to the rows feeding the grouping. Absent → tradable only (active); all → every status; any other value → exact status match (one of active/closed/resolved/expired/unknown).
category?string
Exact-match event category; CSV for multiple (matches ANY).
venue?string
Venue / platform filter (CSV), matched on the market_id prefix (e.g. kalshi,polymarket). platform is an accepted alias.
platform?string
Alias for venue.
volume_min?number
Minimum summed (event-level) volume.
oi_min?number
Minimum summed (event-level) open interest.
expires_before?string
ISO date/datetime inclusive upper bound on a market's end_date (a bare date snaps to end-of-day).
expires_after?string
ISO date/datetime inclusive lower bound on a market's end_date (a bare date snaps to start-of-day).
exclude_categories?string
CSV of category substrings to exclude (case-insensitive substring match).
Response
200 · Paginated list of event summaries with embedded child markets
data?object[]
Show item properties
event_id *string
Prefixed venue event ticker (e.g. kalshi:KXBTCD-…), the grouping key.
category?stringnull
Category shared by this event's markets, drawn from the same fixed cross-venue taxonomy as everywhere else in the API. Null only when the parent event has no category recorded.
market_count *integer
Number of child markets within the requested scope.
volume?numbernull
Summed all-time contract/share volume across the child markets, not dollars. Unit is in volume_unit.
volume_unit?object | null
Wire unit for volume. See QuantityUnit.
open_interest?numbernull
Summed open interest across the child markets: Kalshi contract counts plus Polymarket USD. Unit is in open_interest_unit.
open_interest_unit?object | null
Wire unit for open_interest. See QuantityUnit.
is_constituent *boolean
True when any child market is an index constituent.
markets *object[]
The child markets, each the same shape as a flat /public/markets row.
Show item properties
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?string
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.
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.
status?string
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).
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.
is_constituent?boolean
True when the market is a constituent of at least one index. The public markets list exposes every tracked market; default to constituents by filtering on this flag.
indices?string[]
Index ids this market is a constituent of, ascending. Omitted when the market is in no index. Populated only on the authenticated /api/v1/markets list.
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 its outcome is published.
created_at?string (date-time)
When we first recorded this market, not when the venue listed it. Only the authenticated markets list returns it; the public markets list omits it.
updated_at?string (date-time)
When any stored field on this market last changed on our side, so it also moves on routine metadata refreshes and is not a price-move timestamp. Only the authenticated markets list returns it; the public markets list omits it.
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.
state_code?stringnull
Two-letter US state code when the contract is tied to a state race. Absent for national contests and for markets with no state on record.
city_code?stringnull
Mayoral city code parsed at ingest; present for Mayoral markets, absent otherwise.
name?stringnull
Human-readable parent event name.
meta?object
Show properties
total?integer
Total number of records matching the request across every page, not just the number returned in this one.
page?integer
The 1-based page number this response covers.
per_page?integer
Maximum number of items on a page. The last page may hold fewer.
total_pages?integer
Number of pages available at this per_page. It is at least 1, even when nothing matched.
has_next?boolean
True when a page exists after this one.
has_prev?boolean
True when this is not the first page.
Request example
curl -X GET "https://api.adjacent.markets/api/v1/public/events"
Response example
{
  "data": [
    {
      "event_id": "kalshi:KXPRESPARTY-2028",
      "name": "2028 Presidential Election winner? (Party)",
      "category": "Elections",
      "market_count": 2,
      "volume": 525225.94,
      "volume_unit": "contracts",
      "open_interest": 254090.81,
      "open_interest_unit": "contracts",
      "is_constituent": true,
      "markets": [
        {
          "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?",
          "link": "https://kalshi.com/markets/kxpresparty/kxpresparty-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",
          "status": "active",
          "category": "Elections",
          "is_constituent": true,
          "end_date": "2029-11-07T15:00:00Z"
        }
      ]
    }
  ],
  "meta": {
    "total": 412,
    "page": 1,
    "per_page": 1,
    "total_pages": 412,
    "has_next": true,
    "has_prev": false
  }
}
Adjacent News API
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