the wire format

Standards & protocols

Every box in the lifecycle talks to the next using one of these. Hover into any of them to see the actual payload that flies between systems.

VAST

The XML envelope a video player uses to fetch, render, and track a video ad.

Tells the player where in the timeline to break for ads (pre/mid/post-roll).

The JSON protocol exchanges use to ask DSPs for bids in <100ms.

A neutral JS API that lets viewability vendors measure the same ad the same way.

How a user is recognized across sites and devices when cookies are not available.

Legacy JS interface for interactive video ads. Being phased out in favor of OMID + SIMID.