CrawlCheck

Writing

Findings

Measurements from the corpus, and cases worth writing down. Nothing here names a scanned domain.

We measured what answer engines receive from local business sites. Most of it is not text.

2026-08-13

Three findings from a corpus of sites measured byte by byte, and why none of them appear in a validator.

The purge returned 200 and evicted nothing

2026-08-13

The file that returned 200 to every crawler and could not be read

2026-08-13

Which AI crawlers actually visit a small business site

2026-08-13

Case study: every contact email on a live site bounced, for one character

2026-08-13

A contractor site linked the same misspelled address on every page. Two DNS lookups proved it, and the fix took one line.