ticker | string | Series.ticker | Series.ticker | kalshi: Native Kalshi series ticker (e.g. KXPRES). polymarket: Polymarket series ticker; falls back to slug when null. |
numeric_id | string? | omitted | Series.id | kalshi: Kalshi has no separate numeric series id. polymarket: Polymarket numeric series id. |
title | string | Series.title | Series.title | kalshi: Kalshi series title. polymarket: Polymarket series title. |
category | string? | Series.category | category (spec gap) | kalshi: Kalshi series category. polymarket: Spec gap: live /series rows return category but the gamma OpenAPI omits it. |
frequency | string? | Series.frequency | Series.recurrence | kalshi: Free-form cadence string (e.g. weekly). polymarket: Polymarket calls the cadence recurrence. |
tags | array | Series.tags | omitted | kalshi: Free-form tag strings copied as-is. polymarket: Polymarket Series has no tags; tag relationships live on Events/Markets endpoints. |
settlement_sources | array | Series.settlement_sources | omitted | kalshi: Array of \{name, url\} rulebook authorities, copied as-is. polymarket: Polymarket resolves via UMA optimistic oracle; no per-series feed is exposed. |
fee_type | string? | Series.fee_type | omitted | kalshi: Kalshi fee schedule enum (e.g. quadratic, flat). polymarket: Polymarket fees are configured at the CLOB level, not per-series. |
volume | number? (double) | Series.volume_fp | Series.volume | kalshi: FixedPointCount string parsed to f64; populated only with include_volume=true. polymarket: Cumulative series volume in USD. |
last_updated_ts | string? (date-time) | Series.last_updated_ts | Series.updatedAt | kalshi: RFC3339 string parsed to UTC. polymarket: ISO 8601 string parsed to UTC. |
