What is SemrushBot-OCOB?
SemrushBot-OCOB is the web crawler component used by Semrush's Content Toolkit for gathering and analyzing website content, supporting content marketing research, competitive analysis and SEO optimization. You can set up Agent Analytics to see when SemrushBot-OCOB visits your website.
Overview
| Operated By | Semrush |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | September 14, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
SemrushBot-OCOB usually performs comprehensive, link-following crawls rather than spot checks. Visit frequency may rise while a customer actively monitors your site or a related market.
SemrushBot-OCOB's User Agent
| User Agent | Mozilla/5.0 (compatible; SemrushBot-OCOB/1; +https://www.semrush.com/bot/) |
How To Block SemrushBot-OCOB With Robots.txt
Add this rule to your robots.txt file to block SemrushBot-OCOB from accessing your website, or use Automatic Robots.txt to block all SEO crawlers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: SemrushBot-OCOB # https://knownagents.com/agents/semrushbot-ocob
Disallow: /Insights for SemrushBot-OCOB
As of September 14, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
9% of top websites block SemrushBot-OCOB in their robots.txts.
Overall SEO Crawler Traffic
1.7% of all web traffic came from SEO crawlers.
Top Visited Website Categories
The types of websites most frequently visited by SemrushBot-OCOB.
Frequently Asked Questions
Should I Block SemrushBot-OCOB?
Consider blocking SemrushBot-OCOB only if you do not want your pages included in SEO databases. It does not influence how search engines rank you, and blocking it will not hide backlinks to your site because those are discovered on the linking sites. For context, 9% of the top websites we track currently have robots.txt rules for SemrushBot-OCOB.
Does SemrushBot-OCOB Follow Robots.txt Rules?
Yes. SemrushBot-OCOB is expected to follow robots.txt rules, so a disallow rule is the appropriate first step. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether SemrushBot-OCOB respects it.
Does SemrushBot-OCOB Access Private Content?
No. SemrushBot-OCOB can reach only public pages, and authentication prevents it from accessing private content.
How Can I Tell if SemrushBot-OCOB Is Visiting My Website?
Agent Analytics tracks SemrushBot-OCOB visits in real time. You can also check your server logs for requests whose user-agent string contains "SemrushBot-OCOB". Look for comprehensive site crawls that follow internal links. Because SemrushBot-OCOB does not publish a verification method, any client can claim its identity and a log match is only a clue.
Why Is SemrushBot-OCOB Visiting My Website?
Your domain appears in the ranking, backlink, or competitor data maintained by SemrushBot-OCOB's operator. A customer may be tracking your site, one of your competitors, or a backlink that connects another site to yours.