How to block BLEXBot in robots.txt
BLEXBot is the crawler operated by WebMeUp to build a backlink index used by SEO tools. This page gives the robots.txt rule to disallow the BLEXBot token and notes that WebMeUp documents the crawler and its robots.txt support.
What BLEXBot is
BLEXBot is the crawler operated by WebMeUp to gather link data for a backlink index that powers SEO analysis tools. It is not a search engine, so blocking it does not affect how Google or Bing index your site — it only removes you from WebMeUp's link dataset.
WebMeUp publishes a crawler page documenting BLEXBot, its robots.txt token, and how to limit it. Use that documentation rather than guessing the user-agent string.
The rule
To disallow BLEXBot site-wide, target its token:
User-agent: BLEXBot Disallow: /
The user-agent string contains the BLEXBot token plus a self-identifying URL pointing at WebMeUp's crawler help page. Match the stable token and confirm in logs that activity drops. robots.txt is a request to compliant crawlers, not enforcement.
- Token: BLEXBot
- Operator: WebMeUp (backlink index)
- Not a search engine — blocking it does not affect indexing
How it appears in analytics and logs
A request carrying the BLEXBot token is WebMeUp's backlink crawler fetching a URL. It is a bot event that contributes to an SEO dataset, not a human visit or referral.
Diagnostic use case
Disallow BLEXBot when you do not want your pages sampled into a third-party backlink index, or to reduce crawl load from an SEO-data crawler that sends you no visitors.
What WebmasterID can help detect
WebmasterID classifies BLEXBot by its token as an SEO crawler, separate from human analytics, so you can confirm whether a disallow rule reduced its requests.
Common mistakes
- Confusing BLEXBot with a search-engine crawler that affects indexing.
- Misspelling the token — it must be exactly BLEXBot.
- Inventing IP ranges instead of confirming the effect in logs.
Privacy and accuracy notes
Blocking BLEXBot is a publishing-policy choice in a public file. It involves no visitor data and is not an access-control mechanism.
Related pages
- BLEXBot — WebMeUp backlink crawler
BLEXBot is a crawler associated with WebMeUp/SEO backlink tooling. It is a third-party crawler that builds a backlink index, not a search engine, so it does not affect search rankings directly. Its robots.txt token is BLEXBot; some specifics are marked partially verified.
- How to block DotBot in robots.txt
DotBot is the crawler operated by Moz to build the link index behind its SEO tools. This page gives the robots.txt rule to disallow the DotBot token and notes that Moz documents the crawler and a Crawl-delay option for throttling it.
- How to block MJ12bot in robots.txt
MJ12bot is the distributed crawler operated by Majestic-12 to build the Majestic backlink index. This page gives the robots.txt rule to disallow the MJ12bot token and notes that Majestic documents both a disallow and a Crawl-delay option for slowing it down.
- Bot intelligence
See whether a BLEXBot disallow changed its activity.
Sources and verification notes
- WebMeUp — BLEXBot crawler documentationDocuments the BLEXBot token and robots.txt support.
Last reviewed 2026-06-24. Facts are checked against primary/official sources where available; uncertain specifics are marked “Data not yet verified” rather than guessed.