Pushed out a change to the way “Milestone-Alt” and “Milestone” props are represented in the API.

Previously, Unabated classified one-sided player props as “Milestone-Alts.” These props are linked to a primary prop line through the Alternate Lines array. For example, in an MLB Hits market, a main line might be offered at O/U 0.5 Hits, with associated one-sided Alternate Lines such as 1+ Hits, 2+ Hits, 3+ Hits, and so on.

In some cases, however, operators do not provide a two-sided “main” prop and instead only offer one-sided milestone alts. In these instances, Unabated has historically designated the Milestone-Alt closest to a 50/50 win probability as the “main” line and assigned it to the marketline ID. While this approach maintained consistency, it sometimes led to confusion among API consumers, as the same line could appear both as a main marketline ID and as a Milestone-Alt. We have received feedback requesting a clearer distinction between main marketlines and milestone-alts.

To address this, we updated how these cases are handled. Moving forward, when a market consists solely of Milestone or Milestone-Alt bet subtypes and no two-sided main line exists, the marketline ID will now return NULL values for price and points. This update will make it easier to identify Milestone-Alt-only markets by checking for the absence of price/points data on the marketline ID.