UltronMonitor

Ultron Labs monitoring bot. Checks availability, user journeys, accessibility and compliance of pages its customers watch. Honors robots.txt.

What it does

A watched page is visited at most once every 15 minutes.

How to recognise it

Operator
Ultron Labs
User agent
Mozilla/5.0 (compatible; UltronMonitor/1.0; +https://bots.51ultron.com/monitor)
Name in robots.txt
UltronMonitor
Signature agent
"https://monitor.bots.51ultron.com"
Key directory
https://monitor.bots.51ultron.com/.well-known/http-message-signatures-directory
Key ID
am1yiVaH0O_QvRAqnDYCNS0zijr6tUP-58K80CrKO3E
Category
Monitoring & Operations
Content use
Reference. Content is cited or linked back to the source.
Access
Direct. Run by Ultron Labs from its own infrastructure.

Every request is signed with Web Bot Auth over @authority and signature-agent, with the Ed25519 key published in the directory above. A request that names UltronMonitor without a valid signature is not ours.

How it behaves

Blocking it

In robots.txt:

User-agent: UltronMonitor
Disallow: /

Or write to abuse@51ultron.com and we stop visiting the site.