Chartbeat pings carry engagement and activity state.

The exact /ping collector adds advisory SDK checks for counters, viewport measurements, capability masks and activity flags. Each ping sets exactly one of R, W and I to 1.

Empty referrers, internal cached paths, empty titles and configured metadata remain accepted. Case-distinct fields retain separate checks. Account configuration and engagement truth require external context.

What this pack matches

Hosts: ping.chartbeat.net
Paths: /ping
Vendor docs: docs.chartbeat.com/cbp/tracking/standard-websites/qa-web-integration

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
`h`	required	It is the Chartbeat site id, the host where traffic appears in the dashboard. Chartbeat documents it as the `config.domain` value on the ping. Fix: Set `h` to the site id from the Chartbeat snippet, usually the site's root domain.	`vendor.chartbeat.param.h.missing` `vendor.chartbeat.param.h.empty`	docs
`g`	required	It is the numeric Chartbeat account UID from `config.uid`. Fix: Set `g` to the numeric uid from the Chartbeat snippet.	`vendor.chartbeat.param.g.missing` `vendor.chartbeat.param.g.empty` `vendor.chartbeat.param.g.invalid`	docs
`p`	recommended	It is the page path. Chartbeat documents it as a ping key to check in QA, from `config.path` or the canonical path. Fix: Set `p` to the canonical path Chartbeat should report.	`vendor.chartbeat.param.p.missing` `vendor.chartbeat.param.p.empty`	docs
`d`	recommended	It is the actual domain of the page, which may differ from `h`. Chartbeat documents it as a ping key to check in QA. Fix: Set `d` to the page's domain, or the canonical domain when `useCanonicalDomain` is true.	`vendor.chartbeat.param.d.missing` `vendor.chartbeat.param.d.empty`	docs
`t`	recommended	It is the unique identifier for the page-session. Chartbeat documents each distinct `t` as a separate pageview. Fix: Send a stable page-session id in `t` so successive pings on the same view stay together.	`vendor.chartbeat.param.t.missing` `vendor.chartbeat.param.t.empty`	docs
`g0`	optional	It is the comma-delimited list of sections from `config.sections`. Chartbeat documents it as a ping key to check in QA.	`vendor.chartbeat.param.g0.empty`	docs
`g1`	optional	It is the comma-delimited list of authors from `config.authors`. Chartbeat documents it as a ping key to check in QA.	`vendor.chartbeat.param.g1.empty`	docs
`i`	optional	It is the page title. Chartbeat documents it as present on the first ping of a page-session.	`vendor.chartbeat.param.i.empty`	docs
`r`	optional	The vendor documents `r` in the request contract.	`vendor.chartbeat.param.r.empty` `vendor.chartbeat.param.r.invalid`	docs
`v`	optional	Internal referrer. The SDK sends either a URL or a cached previous page path.		docs
`c`	optional	Elapsed seconds since the page-view start. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.c.empty` `vendor.chartbeat.param.c.invalid`	docs
`x`	optional	Current scroll position, floored by the SDK. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.x.empty` `vendor.chartbeat.param.x.invalid`	docs
`m`	optional	Maximum observed scroll position. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.m.empty` `vendor.chartbeat.param.m.invalid`	docs
`y`	optional	Document scroll height. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.y.empty` `vendor.chartbeat.param.y.invalid`	docs
`o`	optional	Document scroll width. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.o.empty` `vendor.chartbeat.param.o.invalid`	docs
`w`	optional	Viewport client height. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.w.empty` `vendor.chartbeat.param.w.invalid`	docs
`j`	optional	Scheduled ping interval in seconds. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.j.empty` `vendor.chartbeat.param.j.invalid`	docs
`E`	optional	Cumulative engaged seconds. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.E.empty` `vendor.chartbeat.param.E.invalid`	docs
`e`	optional	Engaged seconds since the previous ping. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.e.empty` `vendor.chartbeat.param.e.invalid`	docs
`tz`	optional	Signed timezone offset in minutes. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.tz.empty` `vendor.chartbeat.param.tz.invalid`	docs
`sn`	optional	Ping sequence counter. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.sn.empty` `vendor.chartbeat.param.sn.invalid`	docs
`V`	optional	Producer version number. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.V.empty` `vendor.chartbeat.param.V.invalid`	docs
`b`	optional	Navigation timing value when available. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.b.empty` `vendor.chartbeat.param.b.invalid`	docs
`R`	optional	Producer activity or HUD flag, encoded as 0 or 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.R.empty` `vendor.chartbeat.param.R.invalid`	docs
`W`	optional	Producer activity or HUD flag, encoded as 0 or 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.W.empty` `vendor.chartbeat.param.W.invalid`	docs
`I`	optional	Producer activity or HUD flag, encoded as 0 or 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.I.empty` `vendor.chartbeat.param.I.invalid`	docs
`L`	optional	Producer activity or HUD flag, encoded as 0 or 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.L.empty` `vendor.chartbeat.param.L.invalid`	docs
`nc`	optional	Optional producer marker encoded as 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.nc.empty` `vendor.chartbeat.param.nc.invalid`	docs
`vp`	optional	Optional producer marker encoded as 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.vp.empty` `vendor.chartbeat.param.vp.invalid`	docs
`C`	optional	Optional producer marker encoded as 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.C.empty` `vendor.chartbeat.param.C.invalid`	docs
`l`	optional	Optional producer marker encoded as 1. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.l.empty` `vendor.chartbeat.param.l.invalid`	docs
`im`	optional	Producer image capability mask. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.im.empty` `vendor.chartbeat.param.im.invalid`	docs
`l1`	optional	Cached internal page counter. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.param.l1.empty` `vendor.chartbeat.param.l1.invalid`	docs
`activity_flags_conflict`	recommended	The pinned producer sets exactly one of R, W and I to 1 per ping. Evidence: vendor template.	`vendor.chartbeat.activity_flags_conflict`	docs
`method`	recommended	Pinned browser collector transport. Complete HTTP capture contract. Presence diagnostic severity: warning. Evidence: vendor template.	`vendor.chartbeat.http.method.missing` `vendor.chartbeat.http.method.empty` `vendor.chartbeat.http.method.invalid`	docs

Validate a payload

pixellint validate url "$ARTIFACT" --rulepack vendor/chartbeat

Try this failing payload in the playground. A Chartbeat ping with conflicting activity flags.

https://ping.chartbeat.net/ping?h=example.test&g=123&p=/a&d=example.test&t=opaque&R=1&W=1&I=0

cargo install pixellint · npm install pixellint