robots.txt has an unexpected content type
robots.txt should be served as text/plain. Some parsers are strict about this. 441 sites had this problem when we measured them in the last 7 days. The list gives each one with its domain, name where known, platform, every technology we detected, its A–F grade with all its findings, location where known, and what it serves AI crawlers.
- 441 sites, last 7 days
- 146 US local businesses
- 7% also block an AI crawler
- $99 once, 30 days of downloads
Who has it
Platform
No CMS detected 90%Drupal 6%Next.js 4%WordPress 0%Wix 0%
Grade
D 39%F 28%C 19%A 8%B 6%
Where
Wider corpus 49%US local businesses 33%Government and education 10%SaaS and software 8%
| Where | Category | Grade | Platform | AI crawlers |
|---|---|---|---|---|
| SaaS and software | Other | F | No CMS detected | allowed |
| Government and education | Gov Edu | F | No CMS detected | allowed |
| Tucson, Arizona | Restaurant | A | No CMS detected | allowed |
| Wider corpus | Other | F | No CMS detected | allowed |
| Wider corpus | Saas | A | No CMS detected | allowed |
| Government and education | Gov Edu | F | No CMS detected | allowed |
| Bremerton, Washington | Optometrist | B | No CMS detected | allowed |
| Yelm, Washington | Optometrist | D | No CMS detected | allowed |
A sample from the live files. Names and websites are withheld here; they are in the file you buy. A business found with a defect is never named publicly before its owner has been contacted.
Every field: what a row holds · 25 free rows · a problem, country or industry we do not list: order a custom dataset.