The 33 branches and 227 subcategories the corpus is classified into, with descriptions, so a consumer can build ?branch= / ?domain= filters without guessing. Deliberately OPEN to everyone and NOT metered: it DESCRIBES the corpus, it is not the corpus, and a classification a customer cannot inspect is a black box.

Also returns meta.health — records_total, records_placeholder (records still in the other_unclassified bucket) and avg_domains_per_record. That placeholder count is published rather than hidden: it is the honest measure of how far the classification actually reaches, and it is the number every public coverage claim on the site is checked against.