You could build an alerting system for when bid filtering exceeds a certain amount by using which API feature?

The RTB Breakout API provides detailed bid filtering data, including reasons why bids were filtered out. This granular information is essential for building an alerting system that monitors bid filtering rates and identifies specific issues when they exceed a predefined threshold. The Marketplace API is for managing deals and private auctions. The Creatives API is used for managing creative assets and their approval status. The Pre-targeting API allows publishers to define targeting criteria for their inventory, not for monitoring bid filtering.