Sitemap Variant ObservatoryFCS-3.0

Empirical observatory tracking how AI crawlers interact with sitemap variants across 42+ production domains. What crawlers request, how often, and which variant structures they follow.

Variant Registry

20 observed sitemap variant types cataloged from live crawler traffic — from standard sitemap.xml to constellation-specific, semantic, intelligence, and protocol variants.

Interaction Data

Request frequency, domain distribution, and variant classification derived from empirical crawler logs across 42+ domains.

Dual-Format Index

JSON for agent consumption, XML for crawler discovery. Same data, two surfaces. Generated from the same observation source.

Sitemap Variance Index

Discovery Endpoints

Related Protocols