Unattributed crawlers

11 crawlers with no publicly identified operator

Who runs these crawlers

These 11 crawlers have no publicly identified operator. The user-agent token appears in server logs, but the company or project behind it does not document the crawler or claim it publicly. Treat unattributed traffic more cautiously than a named operator: you cannot check a published crawl policy, and there is no documented contact for crawl-rate complaints.

Each one is still listed individually below with its verified user-agent string and blocking impact, so you can decide per bot rather than blocking a whole unknown group.

This group at a glance

Operator	Unattributed
Crawlers in directory	11
Categories	Data Scrapers, SEO Tools, AI & LLM Bots, Other Agents
SEO impact if blocked	0/10 to 2/10
Crawl behaviour	11 rated safe

Crawlers in this group

How to block or allow these crawlers in robots.txt

These rules cover all 11 crawlers in this group. Add them to the robots.txt file at the root of your domain.

Block Unattributed completely

User-agent: Cotoyogi
User-agent: Crawlspace
User-agent: FriendlyCrawler
User-agent: ImagesiftBot
User-agent: Jetslide
User-agent: Kangaroo Bot
User-agent: MauiBot
User-agent: MyCentralAIScraperBot
User-agent: NovaAct
User-agent: Poseidon Research Crawler
User-agent: ViennaTinyBot
Disallow: /

Allow Unattributed explicitly

User-agent: Cotoyogi
User-agent: Crawlspace
User-agent: FriendlyCrawler
User-agent: ImagesiftBot
User-agent: Jetslide
User-agent: Kangaroo Bot
User-agent: MauiBot
User-agent: MyCentralAIScraperBot
User-agent: NovaAct
User-agent: Poseidon Research Crawler
User-agent: ViennaTinyBot
Allow: /

robots.txt is a request, not an enforcement mechanism. A crawler that ignores it needs a block at the server or CDN layer. Rules are case-sensitive on the path and matched against the user-agent token, not the full user-agent string.

Frequently asked questions about unattributed crawlers

Which crawlers have no identified operator?

These 11 crawlers are grouped as unattributed because no operator is publicly identified for them: Cotoyogi, Crawlspace, FriendlyCrawler, ImagesiftBot, Jetslide, Kangaroo Bot, MauiBot, MyCentralAIScraperBot, NovaAct, Poseidon Research Crawler, ViennaTinyBot.

Should I block crawlers with no identified operator?

Decide per crawler rather than as a group, since these 11 share only the fact that no operator is publicly identified for them. The caution is that you cannot check a published crawl policy or contact anyone about crawl rate. Each crawler's own page, linked in the list above, carries its verified user-agent token, safety rating and blocking impact.

How do I block these crawlers in robots.txt?

Add the following to robots.txt at your domain root: User-agent: Cotoyogi then User-agent: Crawlspace then User-agent: FriendlyCrawler then User-agent: ImagesiftBot then User-agent: Jetslide then User-agent: Kangaroo Bot then User-agent: MauiBot then User-agent: MyCentralAIScraperBot then User-agent: NovaAct then User-agent: Poseidon Research Crawler then User-agent: ViennaTinyBot then Disallow: /. One Disallow line covers all 11 user-agent tokens.

Does blocking these crawlers hurt my search rankings?

2 of these share the highest blocking impact here, rated: Varies - Evaluate before blocking. Google's own ranking crawler is Googlebot, which this operator does not run, so blocking these crawlers does not by itself remove you from Google's index. What it can change is whether AI assistants and analytics tools can read your pages.