vendor/doubleverify-event · ecosystem evidence

DoubleVerify event.png hops need vstevt

Generated video wrappers always send vstevt on event.png, so an empty or missing value is a truncated quartile trail. Impression visit.jpg hops stay vendor/doubleverify. Amazon-hosted /dv/ hops stay vendor/amazon-vfw.

A quartile hop without vstevt is a truncated trail

Generated DoubleVerify video tags always send vstevt on event.png. Dropping it is how the quartile never ties back to the impression.

Rule: vendor.doubleverify-event.param.vstevt.missing

What this pack matches

Hosts: tps.doubleverify.com, tpsc-video-as.doubleverify.com, tpsc-video-eu.doubleverify.com, tpsc-video-ue.doubleverify.com, tpsc-video-uw.doubleverify.com
Paths: /event.png
Vendor docs: support.google.com/displayvideo/answer/2591756

Rules

Codes are stable. A finding in CI, MCP, or the playground lands on the same id.

Field	Required	What it checks	Rule ids	Source
`vstevt`	required	It is the viewability event code on generated DoubleVerify video event.png hops. Google documents ctx, cmp, plc, and sid as dvparams on the wrapper, not this query. Generated event.png tags always send vstevt, so an empty or missing value is a truncated quartile trail. Fix: Export the DoubleVerify video tag again so event.png carries vstevt.	`vendor.doubleverify-event.param.vstevt.missing` `vendor.doubleverify-event.param.vstevt.empty`	docs
`dup`	optional	It is the impression correlation id that ties an event.png hop to its visit.jpg. Generated video wrappers send it on both hops. An empty pair drops the quartile out of the impression. Fix: Keep dup from the generated visit.jpg tag on each event.png hop, or drop the empty pair.	`vendor.doubleverify-event.param.dup.empty`	docs

Validate a payload

pixellint validate url "$ARTIFACT" --rulepack vendor/doubleverify-event

Try this failing payload in the playground. DoubleVerify event.png missing vstevt.

https://tpsc-video-eu.doubleverify.com/event.png?dup=009efc7c-fed0-4c1b-a410-ee9f22dfecc2

cargo install pixellint · npm install pixellint