# Screaming Frog SEO Spider

> 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.

| field | value |
|---|---|
| operator | Screaming Frog |
| category | Tools and frameworks |
| robots.txt token | `Screaming Frog SEO Spider` |
| user-agent contains | `Screaming Frog SEO Spider` |
| robots.txt | obeys robots.txt (documented) |
| verify by | no published verification method |
| published IP ranges | none published |
| prefixes mirrored | 0 IPv4 / 0 IPv6 |
| operator docs | https://www.screamingfrog.co.uk/seo-spider/user-agent/ |
| last reviewed | 2026-09-01 |

## 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
```

## Block it

```
User-agent: Screaming Frog SEO Spider
Disallow: /
```

## Allow it

```
User-agent: Screaming Frog SEO Spider
Allow: /
```

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