Dependencies & Supply Chain
low Severity
Free Check

Third-Party Domain Count & Blast Radius

Measures the total number of unique external domains loaded on the page to evaluate third-party risk exposure.

Test Your Website for Third-Party Domain Count & Blast Radius

Run this check along with 90+ automated tests across your domain.

Why It Matters

Every additional external domain increases your attack surface, introduces potential downtime dependencies, and slows down page speed.

How We Check This

We parse all network requests initiated by the page and tally the count of distinct third-party root domains.

How to Fix & Implement

Copy-paste configuration blocks tailored for your web server or edge proxy.

nginx snippet
Self-host fonts and analytics where possible to consolidate origins

Frequently Asked Questions

What is a reasonable number of third-party domains?

Fewer than 10 external domains is recommended for optimal performance and security hygiene.