Download websites that use SpotX

About SpotX

Brands disappear from advertising technology faster than their tags do. The vendor of record for SpotX is now Magnite, and yet the code we match still carries the original product name, sitting in page templates where it was pasted at some point and never revisited. Detection in this corner of the web is as much archaeology as inventory.

The product belongs to Advertising and dates to 2007, the period when video inventory moved from directly sold placements to programmatic auctions and publishers began stacking supply-side connections instead of choosing one. Its licensing is Proprietary, and the supply-side role means the code is written by the vendor and embedded by the publisher, so what appears on a page is a monetisation arrangement rather than an engineering preference. Nobody adopts an advertising tag because they like the implementation.

A tag that still identifies itself by a retired brand also says something about how the page is maintained. Advertising stacks accumulate rather than get replaced: old wrappers, dormant partners and duplicate calls survive because removing them risks revenue and nobody is entirely certain which line earns what. The measurable state of a publisher's monetisation is therefore usually messier and more layered than the publisher's own account of it, and an outside inventory picks up exactly the residue an internal audit tends to overlook.

As of September 2026 the fingerprint appears on 138 sites, and counts in advertising detection are softer than elsewhere. Tags fire conditionally, arrive through a tag manager, or are injected by a header bidding wrapper that a crawler never triggers, so the figure is a floor and it skews toward sites that hardcode the call into their markup rather than assembling it at runtime. A domain missing from the list may still be transacting through the same supply path.

Even with that caveat the population is the useful thing. For a competing supply-side platform the list is a prospect set with a known integration pattern. For an agency auditing where its video spend actually lands, it is a map of intermediaries it never contracted with directly. For anyone studying what happens to acquired products, a set of domains still carrying an inherited integration under its old name is a measurable answer to how long a brand survives its own acquisition. One lookup tells you what a single page loaded on a single visit. The export tells you which publishers still carry the legacy path and which have finally cleaned it out.