Configured Comscore beacons can omit the page URL.

Current beacon.js requests carry cs_cfg on sb.scorecardresearch.com/b or /b2. Its configuration can disable page URL collection, and truncation can move the URL into ns_cut.

This source profile preserves those requests. Legacy Direct beacons retain their documented c1, seven-digit c2 and c7 requirements in a separate pack. New producer checks are advisory.

What this pack matches

Hosts: sb.scorecardresearch.com
Paths: /b, /b2
Vendor docs: sb.scorecardresearch.com/beacon.js

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
`c1`	recommended	The SDK defaults browser beacons to publisher type 2. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.c1.missing` `vendor.comscore-modern.param.c1.empty` `vendor.comscore-modern.param.c1.invalid`	docs
`c2`	recommended	The SDK needs its configured client identity. Its grammar is opaque. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.c2.missing` `vendor.comscore-modern.param.c2.empty`	docs
`cs_cfg`	recommended	The SDK emits seven binary configuration flags. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.cs_cfg.missing` `vendor.comscore-modern.param.cs_cfg.empty` `vendor.comscore-modern.param.cs_cfg.invalid`	docs
`ns_cut`	optional	Truncated query tail is opaque and can contain a partial page URL.		docs
`c7`	recommended	The page URL is emitted when URL collection is enabled and the request is not truncated. Applies when {"kind":"any","conditions":[{"kind":"exists","param":"c7"},{"kind":"all","conditions":[{"kind":"not","condition":{"kind":"value_pattern","param":"cs_cfg","pattern":"^[01]{3}0[01]{3}$"}},{"kind":"not","condition":{"kind":"exists","param":"ns_cut"}}]}]}. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.c7.missing` `vendor.comscore-modern.param.c7.empty` `vendor.comscore-modern.param.c7.invalid`	docs
`c8`	optional	Optional document title.		docs
`c9`	optional	Optional document referrer. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.c9.empty` `vendor.comscore-modern.param.c9.invalid`	docs
`ns__t`	optional	The SDK stamps epoch milliseconds. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.ns__t.empty` `vendor.comscore-modern.param.ns__t.invalid`	docs
`ns_if`	optional	Optional SDK binary flag. Blank fallback values remain valid. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.ns_if.empty` `vendor.comscore-modern.param.ns_if.invalid`	docs
`cs_gpc`	optional	Optional SDK binary flag. Blank fallback values remain valid. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.cs_gpc.empty` `vendor.comscore-modern.param.cs_gpc.invalid`	docs
`cs_ucfr`	optional	Optional SDK binary flag. Blank fallback values remain valid. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.cs_ucfr.empty` `vendor.comscore-modern.param.cs_ucfr.invalid`	docs
`cs_ucc`	optional	Optional SDK binary flag. Blank fallback values remain valid. Presence diagnostic severity: warning.	`vendor.comscore-modern.param.cs_ucc.empty` `vendor.comscore-modern.param.cs_ucc.invalid`	docs
`ns_c`	optional	Optional producer metadata with opaque grammar.		docs
`cv`	optional	Optional producer metadata with opaque grammar.		docs
`cs_it`	optional	Optional producer metadata with opaque grammar.		docs
`cs_fpcu`	optional	Optional producer metadata with opaque grammar.		docs
`method`	recommended	The source uses these transport methods. Complete HTTP capture contract. Presence diagnostic severity: warning.	`vendor.comscore-modern.http.method.missing` `vendor.comscore-modern.http.method.empty` `vendor.comscore-modern.http.method.invalid`	docs

Validate a payload

pixellint validate url "$ARTIFACT" --rulepack vendor/comscore-modern

Try this failing payload in the playground. A configured Comscore beacon missing an enabled page URL.

https://sb.scorecardresearch.com/b?c1=2&c2=opaque&cs_cfg=0001110

cargo install pixellint · npm install pixellint