Supply Path Inspector

About

Supply Path Inspector

Every publisher that sells programmatic advertising authorizes specific SSPs and exchanges to sell their inventory. This extension lets you see that supply path instantly for any website.

HOW IT WORKS
Open the side panel, enter any domain or click "Scan current tab." Supply Path Inspector reads the site's authorized seller declarations and breaks them down into a clean, searchable dashboard.

WHAT YOU SEE
A summary showing total seller entries, how many are Direct relationships versus Reseller, and the number of unique SSPs. Below that, every SSP is listed with its seller IDs, relationship type, and certification authority IDs where available. Click any SSP to expand and see individual entries.

DIRECT VS RESELLER
Direct means the publisher has a direct business relationship with that exchange. Reseller means a third party is authorized to resell the publisher's inventory through that exchange. Understanding this split is essential for supply path optimization and reducing auction duplication.

FEATURES
Filter by Direct or Reseller with one click. Search by SSP name or seller ID. 80+ SSPs mapped to their common industry names for easy identification. View the raw source file if you need the full text. Works on any website.

WHO THIS IS FOR
Programmatic traders evaluating supply paths before bidding. Ad ops teams auditing publisher setups. Buyers running supply path optimization. Anyone in ad tech who wants to understand how a publisher monetizes their inventory.
No account. No data collected. Runs entirely in your browser.