AdsBot-IAB
IAB technology crawler verifying ads.txt files for programmatic advertising
About this crawler
AdsBot-IAB is a web crawler identified by the regular-expression pattern AdsBot-IAB in the User-Agent request header. It is categorised as advertising. Use the regex above to detect, log, allow, or block AdsBot-IAB traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- AdsBot-IAB
- Pattern
AdsBot-IAB- Tags
- advertising
- Reference
- https://iabtechlab.com/ads-txt/
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
AdsBot-IAB
Block this crawler
robots.txt — disallow AdsBot-IAB:
User-agent: AdsBot-IAB
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} AdsBot-IAB [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "AdsBot-IAB") {
return 403;
}
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