Assistant fetchers
SemrushBot-SWA is a bot operated by Semrush that fetches single pages on demand for an AI assistant. Data collected is used for the SEO Writing Assistant tool to check if URL is accessible. It is documented as honouring robots.txt, but no IP range list or reverse-DNS convention is published, so a request carrying this user agent cannot be proven genuine.
Request says
"SemrushBot-SWA"
Checked against
Nothing published
Live check
No operator check exists for SemrushBot-SWA. This still shows what the address really is.
Reference
| User agent | SemrushBot-SWAToken only: match on the substring. |
|---|---|
| Operator | Semrush |
| Purpose | Checks URLs on your site for SEO Writing Assistant. |
| Respects robots.txt | Honourssource |
| Verification method | Claim onlyNone published, user agent only No IP range file and no reverse-DNS convention have been published for this agent. The user-agent string is the only signal, and any client can send it, so treat a match as a claim rather than proof. |
| Crawl pattern | Roughly once every 10 seconds. |
| Robots.txt tokens | SemrushBot-SWA |
| Operator documentation | None published |
Data collected is used for the SEO Writing Assistant tool to check if URL is accessible.
robots.txt
Paste one at the root of your domain. Rules are per token.
User-agent: SemrushBot-SWA
Disallow: /User-agent: SemrushBot-SWA
Allow: /User-agent: SemrushBot-SWA
Allow: /
Disallow: /account/
Disallow: /checkout/
Disallow: /searchEdit the Disallow paths to match your own URLs.
Blocking SemrushBot-SWA means a person who asks about one of your URLs gets an error instead of a summary. That is a support and reputation trade-off, not a training one.
Build a file for every crawlerFAQ
SemrushBot-SWA is a bot operated by Semrush that fetches single pages on demand for an AI assistant. Data collected is used for the SEO Writing Assistant tool to check if URL is accessible. It is documented as honouring robots.txt, but no IP range list or reverse-DNS convention is published, so a request carrying this user agent cannot be proven genuine.
Yes. The operator documents that SemrushBot-SWA reads robots.txt and follows Disallow rules for its own token. Rules take effect on the next fetch of the file, which can be hours or days after you publish them.
You cannot, at least not from the request itself. No IP range file and no reverse-DNS convention have been published for this agent. The user-agent string is the only signal, and any client can send it, so treat a match as a claim rather than proof. Compare the source IP against hosting and datacenter ranges instead, and rate limit anything that behaves like a crawler.
Add the SemrushBot-SWA token to robots.txt with Disallow: /. If the crawler ignores robots.txt, match the user agent at your CDN or reverse proxy and return 403 there instead.
Blocking SemrushBot-SWA means a person who asks about one of your URLs gets an error instead of a summary. That is a support and reputation trade-off, not a training one.