Linespider user agent
Operated by LY Corporation (LINE)
Linespider is LINE's crawler that collects pages for LINE search services.
The Linespider bot at a glance
- Linespider is operated by LY Corporation (LINE) and crawls web pages for a search engine index.
- The robots.txt token for Linespider is Linespider.
- Blocking a search engine crawler removes your pages from that search engine's results.
- Linespider robots.txt support: Yes.
- Recommendation for Generative Engine Optimization (GEO): Allow.
What is Linespider?
Linespider indexes public pages for search features inside LINE, popular in Japan, Taiwan and Thailand.
LINE documents the crawler and how to control it on its help site.
Should you block Linespider?
Allow Linespider unless it causes a measurable load problem.
| Effect on search rankings | Blocking a search engine crawler removes your pages from that search engine's results. |
|---|---|
| Effect on AI visibility | AI features built on that search index, such as Google AI Overviews and AI Mode on top of Googlebot, also lose access to your pages. |
| Follows robots.txt | Yes |
| Recommendation | Allow |
How to block or allow Linespider
Put the robots.txt rule in the file at the root of every domain and subdomain, for example https://example.com/robots.txt. The token Linespider is matched case-insensitively.
robots.txt: block
# Block Linespider
User-agent: Linespider
Disallow: /robots.txt: allow
# Allow Linespider
User-agent: Linespider
Allow: /robots.txt: partial
# Keep Linespider out of private areas only
User-agent: Linespider
Disallow: /wp-admin/
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Allow: /Nginx
# Nginx: return 403 to Linespider
if ($http_user_agent ~* "(Linespider)") {
return 403;
}Apache
# Apache .htaccess: return 403 to Linespider
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} (Linespider) [NC]
RewriteRule .* - [F,L]Cloudflare WAF
# Cloudflare > Security > WAF > Custom rule, action: Block
(http.user_agent contains "Linespider")How to verify real Linespider traffic
LY Corporation (LINE) publishes no IP list or reverse DNS pattern for Linespider, so the user agent cannot be verified. Anyone can send the same string. Rate-limit unusual volume instead of trusting the name.
How to find Linespider in your server logs
Search the web server access log for the token. The command below counts Linespider requests per URL on Nginx or Apache.
grep -i "Linespider" access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head -20For a full report per AI bot, upload the log to the AI Log File Analyzer, a free tool by Justin Hà.
Linespider user agent string
The full user agent LY Corporation (LINE) publishes for Linespider. Version numbers such as Chrome/W.X.Y.Z change over time, so match the token, not the whole string.
Mozilla/5.0 (compatible; Linespider/1.1; +https://lin.ee/4dwXkTH)Linespider FAQ
Linespider identifies itself with the robots.txt token "Linespider". A typical request header reads: Mozilla/5.0 (compatible; Linespider/1.1; +https://lin.ee/4dwXkTH)
Yes. LY Corporation (LINE) states that Linespider follows robots.txt rules written for the "Linespider" token.
Blocking a search engine crawler removes your pages from that search engine's results. AI features built on that search index, such as Google AI Overviews and AI Mode on top of Googlebot, also lose access to your pages.
Add two lines to the robots.txt file at the root of each domain and subdomain: "User-agent: Linespider" followed by "Disallow: /". The token is case-insensitive. Changes can take up to 24 hours to be picked up.
Not reliably. LY Corporation (LINE) publishes no IP list or reverse DNS pattern for Linespider, so anyone can send the same user agent. Rate-limit unusual volume instead of trusting the name.
Search your server access log for "Linespider", for example with: grep -i "Linespider" access.log. The AI Log File Analyzer by Justin Hà counts visits per AI bot from an uploaded log file.
Sources: LY Corporation (LINE) crawler documentation. Last reviewed by Justin Hà.
See which of these bots actually reach your website
The AI Log File Analyzer by Justin Hà counts visits from GPTBot, ClaudeBot, PerplexityBot and other AI crawlers in your server log, for free. The GEO Technical Package sets up robots.txt, llms.txt and crawler access for AI search.
