# Win Notifications

If an `nurl` is provided in the bid response, Chartboost will send the win notification via server-side HTTP GET requests. Standard OpenRTB 2.5 macro replacement is supported here.

**Supported nurl macros:**

* `${AUCTION_ID}`
* `${AUCTION_BID_ID}`
* `${AUCTION_IMP_ID}`
* `${AUCTION_SEAT_ID}`
* `${AUCTION_AD_ID}`
* `${AUCTION_PRICE}`
* `${AUCTION_CURRENCY}`


`${MIN_BID_TO_WIN}` can be provided upon request. When provided via `nurl`, `${MIN_BID_TO_WIN}` will return the bid price of the second-highest bidder, if available. Returns 0 if not available.