ticker | string | EventData.event_ticker | Event.slug | kalshi: Native Kalshi event ticker. polymarket: Polymarket event slug; numeric id lives in numeric_id. |
numeric_id | string? | omitted | Event.id | kalshi: Kalshi has no separate numeric event id. polymarket: Polymarket numeric event id. |
title | string | EventData.title | Event.title | kalshi: Kalshi event title. polymarket: Polymarket event title. |
description | string? | EventData.sub_title | Event.description | kalshi: Kalshi sub_title carries the disambiguating prose; empty strings become null. polymarket: Polymarket event description. |
category | string? | omitted | Event.category | kalshi: Kalshi events have no category; the category lives on the parent Series. polymarket: Polymarket event category. |
series_ticker | string? | EventData.series_ticker | synthetic | kalshi: Native Kalshi series ticker. polymarket: Read from the embedded series[0].ticker (falls back to series[0].slug). |
market_tickers | array | synthetic | synthetic | kalshi: Read from the nested markets[*].ticker when with_nested_markets=true. polymarket: Read from the embedded markets[*].slug. |
status | string? | omitted | Event.closed | kalshi: Kalshi has no event-level status; lifecycle is per-market. polymarket: Derived closed/open string from the boolean closed flag. |
start_ts | string? (date-time) | omitted | Event.startDate | kalshi: Kalshi events expose only strike_date, no separate start. polymarket: ISO 8601 string parsed to UTC. |
end_ts | string? (date-time) | EventData.strike_date | Event.endDate | kalshi: Kalshi strike_date is the resolution time. polymarket: ISO 8601 string parsed to UTC. |
last_updated_ts | string? (date-time) | EventData.last_updated_ts | Event.updatedAt | kalshi: RFC3339 string parsed to UTC. polymarket: ISO 8601 string parsed to UTC. |
volume | number? (double) | omitted | Event.volume | kalshi: Kalshi does not aggregate volume at the event level. polymarket: Polymarket event lifetime volume in USD. |
open_interest | number? (double) | omitted | openInterest (spec gap) | kalshi: Kalshi does not aggregate open interest at the event level. polymarket: Spec gap: live event payloads return a flat openInterest, but the gamma OpenAPI types only openInterestAmm. |
mutually_exclusive | boolean? | EventData.mutually_exclusive | Event.negRisk | kalshi: True when only one child market resolves YES (e.g. races). polymarket: negRisk flag carries the same semantics for pick-one-of-N events. |
