Where is App Search Validation Tool

I am setting up universal links for my app. And running into some issues when setting it up for production.

The following technical advisory recommends to use app search API validation tool.

Technical Advisory: https://developer.apple.com/library/archive/qa/qa1916/_index.html#//apple_ref/doc/uid/DTS40017117

Tool Path: https://search.developer.apple.com/appsearch-validation-tool

However clicking on the app search API validation tool leads to the generic search.developer.apple.com page. So where is the tool?

Where is App Search Validation Tool
 
 
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