SemrushBot-OCOB

SemrushBot-OCOB is the fetch behind Semrush's AI writing tool rather than its backlink index. It sits in this registry because the pages it reads feed AI content generation, not because Semrush is a model lab.

Semrush asks that the bot be managed by token rather than by address, and states that it uses no consecutive IP blocks.^[1] That rules out a firewall range rule and leaves robots.txt as the intended control.

Semrush documents intervals of up to ten seconds between requests to a site.^[2] Where no crawl-delay is set, it says the crawler adapts its request frequency to the server load it observes.^[3]

Operator documentation: https://www.semrush.com/bot/

A user agent is a claim, not a proof: any client can send any name. Where an operator publishes IP ranges, a reverse lookup is the only way to tell a real visit from an impersonation.