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Frontend DevelopmentPostHog

exploring-live-traffic

Inspects PostHog Web analytics Live tab data — current users online, last-30-minutes pageviews, top pages, referrers, devices, browsers, countries, bot traffic, and the per-minute bot/users charts. Use when the user asks "who is on my site right now?", "what is happening live?", "what bots are crawling me?", asks about the "live tab" / "live dashboard", wants live numbers (last 30 min), or wants help filtering or drilling into the live view. Also covers building product-analytics insights that mirror what the tiles show.

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34,779
Source
PostHog/posthog
Updated
2026-05-31
Slug
PostHog--posthog--exploring-live-traffic
View on GitHubRaw SKILL.md

// install — copy + paste into any project

mkdir -p .claude/skills && curl -fsSL https://raw.githubusercontent.com/PostHog/posthog/HEAD/products/web_analytics/skills/exploring-live-traffic/SKILL.md -o .claude/skills/exploring-live-traffic.md

Drops the SKILL.md into .claude/skills/exploring-live-traffic.md. Works with Claude Code, Cursor, and any agent that loads SKILL.md files from .claude/skills/.

Exploring Web analytics live traffic

The Web analytics Live tab (/web/live) shows real-time activity over a 30-minute sliding window plus a 60-second "users online" count. It is the place to answer "what is happening on my site right now?" — pageviews, named bots, devices, geo, top paths, top referrers, and a live event feed.

This skill teaches you (the agent) how to:

  • recognize a request that belongs on the Live tab
  • read the tile model (what each card shows, where the data comes from)
  • manipulate the only filter that exists (host)
  • build product-analytics insights that match a Live tile when the user wants longer time ranges or deeper drill-down than the live window offers

The Live tab is not a HogQL playground — its data comes from a livestream backed by short HogQL backfills. When the user wants to query "right now" data with HogQL, point them at the tab; when they want historical breakdowns, build an insight with the patterns below.

When to use this skill

Use this skill when the user:

  • asks "who is on my site right now?", "what is happening live?", "show me live traffic"
  • mentions the "Live" tab, the "Live dashboard", or the live page (/web/live)
  • asks about live bot traffic ("which bots are crawling me?", "is GPTBot scraping us?")
  • wants to filter live traffic by domain / host
  • wants to compare what they see on the Live tab to a longer time window — e.g. "the live tab shows GPTBot is hammering us, can you give me a 7-day chart of that?"

Do not use this skill for non-realtime web analytics work — for that, use the standard Web analytics tab (/web).

Tab structure

URL: /web/live

The tab has two filter affordances and a grid of tiles. Date range is fixed: 30 minutes sliding window for everything except "Users online" (last 60 seconds).

Filters

There is only one filter on the live tab: the host (domain) selector.

  • It comes from webAnalyticsFilterLogic.selectedHost.
  • It is shared with the rest of Web analytics, so changing it on /web propagates to /web/live and vice-versa.
  • It is gated by feature flag WEB_ANALYTICS_LIVE_DOMAIN_FILTER. If the flag is off, no host filter UI is rendered and all tiles show data across every domain.
  • Setting the host filter narrows: the SSE stream, the HogQL backfill queries (so the initial 30 min is host-scoped), and the "users online" count.
  • There is no date picker, no compare control, no property filters, no test-account filter on the Live tab. Do not promise the user controls that don't exist.

When the user asks "filter live traffic by domain <host>", direct them to the Domain selector at the top of the Live tab. There is no URL param to set it directly — it persists in localStorage via webAnalyticsFilterLogic.

Stat cards (top strip)

Card What Window
Users online Distinct device IDs seen in the last 60 seconds 60s
Unique visitors Distinct device IDs in the last 30 min 30m
Pageviews $pageview count in the last 30 min 30m

Content cards

Card What Notes
Active users per minute Bar chart, new vs returning visitors last 30 min
Top pages Animated leaderboard, $pathname + view count top 10, 30 min
Top referrers Animated leaderboard, $referring_domain top 10, 30 min
Devices Breakdown bars, $device_type top 6 + Other
Browsers Breakdown bars with logos, $browser top 6 + Other
Top countries Breakdown bars, $geoip_country_code top 6 + Other; replaced by a Country/City tab card if WEB_ANALYTICS_LIVE_CITY_BREAKDOWN is on
Bot requests per minute Bar chart, bot events / minute flag WEB_ANALYTICS_BOT_ANALYSIS
Bot traffic Named bots ranked by event share, with category tag flag WEB_ANALYTICS_BOT_ANALYSIS; rows are clickable and open an insight for that specific bot
Countries (world map) SVG world map heat flag WEB_ANALYTICS_LIVE_MAP
Live events Streamed event feed (event, person, URL, timestamp) last 50 events

Every tile (except the live event feed and world map) has an "Open as new insight" button that opens a 7-day Trends query in product analytics. The bot traffic tile rows are also individually clickable — clicking a bot row opens a single-bot trend.

Bot detection model

Bots are detected server-side. Three virtual properties are attached to the event before it lands in ClickHouse:

  • $virt_is_bot — boolean, true if classified as a bot
  • $virt_bot_name — string, the bot's display name (e.g. Googlebot, GPTBot, Claude, Lighthouse, HeadlessChrome)
  • $virt_traffic_category — string, the category key: ai_crawler, ai_search, ai_assistant, search_crawler, seo_crawler, social_crawler, monitoring, http_client, headless_browser, no_user_agent, regular

The Live bot tiles count "bot-eligible" events: $pageview, $pageleave, $screen, $http_log, $autocapture. $http_log is included because most bots emit server-side HTTP logs rather than JS pageviews.

Building product-analytics queries that mirror the Live tab

When the user wants a longer window, a saved insight, a dashboard tile, or to share a view of what's on the Live tab, build a Trends insight. The "Open as new insight" buttons in the UI use exactly these recipes:

Bot traffic breakdown (matches the bot tile header)

A single chart of all bots over time, broken down by name. This is the canonical "who's crawling me?" view.

{
  "kind": "TrendsQuery",
  "interval": "hour",
  "dateRange": { "date_from": "-7d" },
  "series": [
    {
      "kind": "GroupNode",
      "custom_name": "Requests",
      "operator": "OR",
      "math": "total",
      "nodes": [
        { "kind": "EventsNode", "event": "$pageview", "math": "total" },
        { "kind": "EventsNode", "event": "$pageleave", "math": "total" },
        { "kind": "EventsNode", "event": "$screen", "math": "total" },
        { "kind": "EventsNode", "event": "$http_log", "math": "total" },
        { "kind": "EventsNode", "event": "$autocapture", "math": "total" }
      ]
    }
  ],
  "properties": [{ "key": "$virt_is_bot", "value": ["true"], "operator": "exact", "type": "event" }],
  "breakdownFilter": {
    "breakdown": "$virt_bot_name",
    "breakdown_type": "event",
    "breakdown_limit": 25
  },
  "trendsFilter": { "display": "ActionsBarValue" }
}

Single bot drill-down (matches a clicked bot row)

{
  "kind": "TrendsQuery",
  "interval": "hour",
  "dateRange": { "date_from": "-7d" },
  "series": [
    /* same combined "Requests" GroupNode as above */
  ],
  "properties": [
    { "key": "$virt_is_bot", "value": ["true"], "operator": "exact", "type": "event" },
    { "key": "$virt_bot_name", "value": ["GPTBot"], "operator": "exact", "type": "event" },
    { "key": "$virt_traffic_category", "value": ["ai_crawler"], "operator": "exact", "type": "event" }
  ],
  "trendsFilter": { "display": "ActionsLineGraph" }
}

The category filter is optional — include it when the user asks about a specific bot+category combo (Lighthouse · headless_browser is a different signal from Lighthouse · monitoring).

Bot category breakdown (matches the bot events chart tile)

Use breakdown by $virt_traffic_category instead of $virt_bot_name when the user wants "AI crawlers vs SEO crawlers vs everything else" rather than per-bot rows.

Top pages / referrers / devices / browsers / countries

For non-bot tiles, use $pageview with math: unique_users, breakdown by the underlying property:

Tile breakdown property display
Top pages $pathname ActionsBarValue
Top referrers $referring_domain ActionsBarValue
Devices $device_type ActionsPie
Browsers $browser ActionsPie
Countries $geoip_country_code WorldMap

Always inherit the live tab's host filter when the user is asking about a specific domain — add { "key": "$host", "value": ["<host>"], "operator": "exact", "type": "event" } to properties.

Defaults to use

  • dateRange.date_from: -7d unless the user names a window — the live view itself is 30 min, but the user is almost always asking about a longer window when they request an insight version.
  • interval: hour for 7-day windows, minute only for windows under a day, day for windows beyond 14 days.
  • Always inherit the host filter when one is set on the Live tab. Don't drop it silently — that changes the answer.

Common requests and the right move

User says Right move
"What's happening on the site right now?" Send them to /web/live
"Filter live traffic to example.com" Use the Domain selector at top of /web/live
"Show me bots crawling us in the last 30 min" /web/live → Bot traffic tile
"Show me bots crawling us this week" Build the "Bot traffic breakdown" insight above with date_from: -7d
"How much is GPTBot hitting us?" Build the "Single bot drill-down" insight, set $virt_bot_name to GPTBot
"Why is the live tab showing X but my dashboard shows Y?" The live tab is a 30-min sliding window over events; dashboards aggregate over the picked range. They are not directly comparable beyond the last 30 min.
"Add a date range to the live tab" The Live tab has no date picker — for ranges, build a Trends insight using the patterns above
"Filter live traffic by browser / device / country" Not supported — only the host filter exists. Build a Trends insight with the relevant breakdown + filter instead

Gotchas

  • Bot virtual properties ($virt_*) only exist on events processed by the bot classification step. They are not retroactive — events from before the classifier shipped will not have them. Keep dateRange.date_from within the last few months for reliable bot results.
  • $http_log events come from server-side log capture, not from posthog-js. If a project does not emit $http_log, bots that don't run JS (most crawlers) will be invisible to the bot tiles.
  • The 30-minute window is a sliding aggregation over an in-memory buffer in the browser — refreshing the page replays the backfill HogQL, not the SSE stream. Do not interpret a brief "0" right after page load as a real drop.
  • The host filter strips the protocol — pass example.com, not https://example.com.
  • Tile order is persisted per-team in localStorage (under feature flag WEB_ANALYTICS_LIVE_EDIT_LAYOUT). If a user's layout looks different from yours, it is not a bug.