mj12bot.com

What It Is

MJ12Bot is a web crawler operated by Majestic. It positions itself as a “Good crawler”: it identifies itself, runs globally in a distributed manner, and respects robots.txt. It supports Majestic.com’s data ecosystem. Its core purpose is not to cache web page content or personal data, but to crawl link relationships between websites and build a web graph and backlink search index.

Core Capabilities and Data

From a marketing and SEO perspective, MJ12Bot’s value lies in providing the underlying data for Majestic’s backlink analysis tools, such as Site Explorer. The source text describes Majestic as a UK-based specialist search engine covering 13 languages and more than 60 countries, used by hundreds of thousands of businesses. The data currently crawled by MJ12Bot is mainly a web graph of links, rather than a full-text cache of web pages.

Control, Integration, and Support

Webmasters can block MJ12Bot via robots.txt by specifying User-agent: MJ12bot and Disallow: /. It also supports Crawl-Delay up to 20 seconds, as well as extensions such as same-site robots.txt redirects, simple wildcards in Disallow rules, and Allow priority. Because it is a community-based distributed crawler and does not use a fixed continuous IP range, the official recommendation is not to block it by IP via htaccess. If you need to verify the source of requests, you can contact the official team to set up CRAWLER-IDENT. Support is mainly available via email at [email protected].

Pricing and Target Users

The crawled content does not provide pricing, plans, payment methods, or free trial information for Majestic or MJ12Bot. Suitable audiences include webmasters, SEO teams, marketing analysts, and operations teams that need to manage crawler access. For ordinary users, MJ12Bot is not a marketing tool used directly, but rather the collection layer behind Majestic’s backlink data.

Pros, Cons, and Access from China

Its advantages include transparent identification, respect for robots.txt, fairly detailed documentation, and a clear statement that it does not cache web page content or personal data. Its drawbacks are that distributed IPs are difficult to manage by address, and it may continue to visit links related to 404, 301, and nofollow cases; the Crawl-Delay limit is also relatively restricted. The source text does not disclose accessibility from mainland China, payment methods, or local alternatives, so its China access status is unknown.