The /lp endpoint (gclid joins, direct and organic clicks)

POST https://trackcrown.com/lp is the call the landing-page SDK makes on page load. Call it yourself when you cannot use the script — for example from a single-page app or a server-rendered landing page. It answers with the click ID the page should keep and report conversions with.

Request#

Response#

{"click_id":"0192f3c1a2b4e1f0c9d84b2a7e6f5d3c","source":"gclid"}

The tracking domain answers in this order:

A parallel-tracking click is found immediately, even while it is still waiting to be written to the reporting database (the recent-click cache is checked first).

Direct and organic clicks get the visitor's IP, geo, device, user agent, language and referrer, are checked for uniqueness (same key as tracking links: offer, partner, IP and user agent within 24 hours) and get fraud flags. They are reported with link type direct, status reason lp (or organic).

Errors#

All errors are JSON {"error":"…"}.

Examples#

Parallel tracking on a shared brand domain, where the landing page only knows the gclid:

curl -s https://trackcrown.com/lp -H 'Content-Type: text/plain' \
  -d '{"gclid":"EAIaIQobChMI","url":"https://www.example.com/?gclid=EAIaIQobChMI"}'
# {"click_id":"0192f3c1a2b4e1f0c9d84b2a7e6f5d3c","source":"gclid"}

Direct visit for a partner's direct link:

curl -s https://trackcrown.com/lp -H 'Content-Type: text/plain' \
  -d '{"offer":"SHOP01","aff":"partner7","url":"https://www.example.com/?sub1=summer","referrer":""}'
# {"click_id":"0192f3c5…","source":"direct"}

Browser code without the SDK:

fetch("https://trackcrown.com/lp", {
  method: "POST",
  headers: { "Content-Type": "text/plain" },
  body: JSON.stringify({ offer: "SHOP01", gclid: new URL(location.href).searchParams.get("gclid") || "",
                         url: location.href, referrer: document.referrer }),
}).then((r) => r.json()).then((r) => { if (r.click_id) localStorage.setItem("atk_cid", r.click_id); });

Google Ads auto-tagging#

Google's auto-tagging adds gclid (or gbraid / wbraid on iOS) to the final URL. With a transparent tracking template, the tracker reads them from the url= value of the click, so the template never needs {gbraid} or {wbraid} tags — Google has no such ValueTrack parameters. The same values on the landing page then join the click through /lp.