Semrush
SemrushBot
Collects web and link data for Semrush analysis tools.
SEO analysisSEO analysis
SplitSignalBot
Crawls pages for Semrush’s SplitSignal SEO tests.
Operated by Semrush
See your agent traffic PurposeSEO analysis
HTTP identifierSplitSignalBot
IdentityVerify beyond the name
THE SIGNAL
What this visit tells you
Test-related crawling is operational traffic.
Crawled URLs
Broken destinations
Crawl duration
Your next move
Confirm the test scope and keep it separate from search-engine visits.
The technical details
MarkdownHow to identify it
Look for the SplitSignalBot identifier in a request’s User-Agent. This is a name match, not identity verification. Version strings may change.
How to check identity
A User-Agent match identifies a claimed client. Check the source IP and any operator-published verification method before granting access.
Access and robots.txt
The operator documents robots.txt rules for this identifier.
Optional full-site opt-out. Merge with existing rules only if intended. robots.txt does not secure private content.
User-agent: SplitSignalBot
Disallow: /Seeing 403 or 404 responses?
403 means access was denied; 404 means the resource was not found. Compare the public path, request time, edge security event and origin response to find the cause.
Separate intended restrictions and secret-file probes from pages that should work. A User-Agent name alone does not justify allowing a request.
SourcesReviewed 2026-09-14
Identity and purpose are based on these sources. Analytics interpretation and suggested checks are Apostl guidance.
APOSTL PulseSee SplitSignalBot in context
See their requests. Find the pages that matter.
See your agent trafficKEEP EXPLORING
Different bots, different intent
Semrush
SiteAuditBot
Checks technical SEO in Semrush Site Audit.
SEO analysisSemrush
SemrushBot-BA
Crawls for Semrush Backlink Audit.
SEO analysis