curl -s https://www.pathwren.workers.dev/crawler/screaming-frog-seo-spider.json   # this page, as JSON

Screaming Frog SEO Spider

Screaming Frog · Tools and frameworks · json

User-agent: Screaming Frog SEO Spider
Disallow: /

What it is

Not an operator: desktop crawling software that anybody can point at any site. The default user-agent identifies the tool, not who is running it, and the operator of the moment is whoever pressed start.

What blocking it costs you

You block a consultant auditing your own site as often as you block a stranger. Treat it as a rate-limit question, not a consent one — and note that the user-agent is configurable, so a block is advisory.

Full user-agent string

Screaming Frog SEO Spider/21.0

Allow it instead

User-agent: Screaming Frog SEO Spider
Allow: /

Ask this page a question, with one GET

A question about this page, answered by a call you can make right now — no key, no account, no JSON-RPC, nothing to assemble. The query string is already filled in with this page's own subject.

curl -s 'https://www.pathwren.workers.dev/tools/verification-methods?crawler=screaming-frog-seo-spider&s=client-dossiers'

• /tools/verification-methods?crawler=screaming-frog-seo-spider
  How do I prove a request really is Screaming Frog SEO Spider? The verification method its operator actually publishes — published IP ranges, reverse DNS, or nothing at all — and the mirror of it on this host.

Every parameter above is a value the endpoint reads, not an address it visits: nothing is fetched on your behalf. Called without any parameter, each endpoint returns its own specification instead of an error. All of them.

Operator documentation: https://www.screamingfrog.co.uk/seo-spider/user-agent/
Machine copies: json · markdown
Policies that name this crawler: allow-all · maximum-ai-visibility