Unknown Message Types on some of our multicast channels - SpiderRock/SRDataFeed GitHub Wiki

Some of our multicast channels have message types that are not published in our spec or available via our API library. We are moving towards separating out external client feed publishers from our internal feed publishers, which would eliminate this nuisance.

For full transparency, these are the internal message types you may see:

446 (StockAuctionSummary) - This is a 5 day history of the opening/closing auction prints. We may add this to our external spec and API, since some clients may want this.

449 (StockRegSHOStatus) - This is notification of the down-tick short sale restriction. Ditto, we may add this to our external spec and API, since some clients may want this.

3000 (StockPrintSet) and 3020 (OptionPrintSet) - These are messages heading to our historic/archive servers and elasticsearch cluster for analysis. Our dev group indicated we’re planning to remove these from the primary multicast channels.