The cross-venue "matches" catalog: every approved global market link (one real-world contract listed on 2–4 venues) for which order execution asserts a union order book per side. Rows are ranked by the largest Discover hourly-volume score across their legs and paged by an opaque cursor. Served straight from the catalog cron's Redis keys, rebuilt every 60 s; empty until the first cycle after a deploy. Each leg's executable mirrors what GET /orders/route-fees on the execution API reports for that venue, so a row says which venues an order can be routed to and which are display-only.

Cached with Cache-Control: public, max-age=15, s-maxage=30.