Quantcast image pixels carry their account in the GIF path.

Quantcast image pixels use /pixel/p-code.gif. Their account identity comes from the path, so query parameters cannot replace an invalid path identity.

Labels and order identifiers remain open. Populated revenue must be numeric. Matrix beacons and conversion API batches have separate contracts.

What this pack matches

Hosts: pixel.quantserve.com
Paths: Full path expression: /pixel/[^/]*\.gif
Vendor docs: help.quantcast.com/docs/advanced-installation-image-pixels-non-javascript

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
`pcode`	required	The image path carries the configured p-code, starting with p-.	`vendor.quantcast-image.param.pcode.missing` `vendor.quantcast-image.param.pcode.empty` `vendor.quantcast-image.param.pcode.invalid`	docs
`labels`	optional	Optional event or audience labels remain open.		docs
`orderid`	optional	Optional order identity remains opaque.		docs
`revenue`	optional	Optional numeric order value, without a currency symbol.	`vendor.quantcast-image.param.revenue.empty` `vendor.quantcast-image.param.revenue.invalid`	docs

Validate a payload

pixellint validate url "$ARTIFACT" --rulepack vendor/quantcast-image

Try this failing payload in the playground. A Quantcast image pixel with an invalid path identity.

https://pixel.quantserve.com/pixel/bad.gif?pcode=p-synthetic

cargo install pixellint · npm install pixellint