${AUCTION_IMP_TS}

What it expands to

Unix timestamp in milliseconds of when the impression was fulfilled.

Expands with the Unix timestamp in milliseconds of when the impression was fulfilled. Added in 2.6-202303.

What to watch for

Fulfillment time is not auction time: for long CTV pods or delayed rendering the gap matters for attribution windows and billing disputes.

Encoding

When a macro rides inside another URL as a query parameter, the expanded value must survive URL parsing: exchanges support suffixed forms like ${AUCTION_IMP_TS:B64} (base64) where documented, and values containing reserved characters must be percent-encoded. An unencoded expansion is the most common reason a notice URL truncates at the first ampersand.

Related

• All substitution macros
• Where nurl, burl, and lurl fire in the delivery flow
• Loss reason codes
• ${AUCTION_ID}
• ${AUCTION_BID_ID}
• ${AUCTION_IMP_ID}
• ${AUCTION_SEAT_ID}
• ${AUCTION_AD_ID}