bigsur.ai
bigsur.ai is a bot that fetches single pages on demand for an AI assistant, and its operator has not been publicly identified. bigsur.ai is a web crawler operated by Big Sur AI that fetches website content to enable AI-powered web agents, sales assistants, and content marketing solutions for busi…. No IP range list or reverse-DNS convention is published, so a request carrying this user agent cannot be proven genuine and a robots.txt rule alone will not stop a forgery.
bigsur.ai at a glance
| User agent | bigsur.aiToken only. The operator has not published a full user-agent string, so match on the substring rather than an exact header. |
|---|---|
| Operator | Not publicly identified |
| Purpose | Assistant fetchers |
| Respects robots.txt | Not documented |
| Verification method | None 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 | Not published |
| Robots.txt tokens | bigsur.ai |
| Operator documentation | None published |
bigsur.ai is a web crawler operated by Big Sur AI that fetches website content to enable AI-powered web agents, sales assistants, and content marketing solutions for busi…
Allow or block bigsur.ai
Paste one of these into the robots.txt file at the root of your domain. Rules are per token, so a block on one crawler leaves every other bot untouched.
User-agent: bigsur.ai
Disallow: /Blocks every path for this crawler only.
User-agent: bigsur.ai
Allow: /Explicit allow. Useful when a wildcard rule above it would otherwise catch this crawler.
User-agent: bigsur.ai
Allow: /
Disallow: /account/
Disallow: /checkout/
Disallow: /searchEdit the Disallow paths to match your own account, checkout and search URLs.
What blocking actually costs you
Blocking bigsur.ai 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.
Block every crawler in the directory at onceIs that really bigsur.ai?
A user-agent header is a string the client chooses. Scrapers copy bigsur.ai precisely because site owners allow it. 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.
Paste the IP address from your access log below. You will see whether it belongs to a hosting provider, a residential proxy pool or a Tor exit, plus the ASN that announces it, which is what tells you whether the claim holds up.
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Agentscan checks a request against published crawler ranges, reverse DNS and hosting data, then returns a verdict your edge can act on. One call per request, no range files to keep up to date.