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MJ

MJ12Bot

GoodBotVerifiedBOT

MJ12bot is the web crawler for Majestic. MJ12Bot does not currently cache web content or personal data. Instead it maps the link relationships between websites to build a search engine. This data is available to technologies and the public, either by searching for a keyword or a website at Majestic. Operated by Majestic.

GoodBot
Assessment
SEO
Category
BOT
Kind
1
Data sources
AI-generated summary, drawn from Cloudflare, operator docs, and community data

What is MJ12Bot?

MJ12Bot is a web crawler operated by Majestic. MJ12bot is the web crawler for Majestic. MJ12Bot does not currently cache web content or personal data. Instead it maps the link relationships between websites to build a search engine. This data is available to technologies and the public, either by searching for a keyword or a website at Majestic.

Helpful — Verified, safe crawler. Respects robots.txt and provides operator documentation.

Identification

Bot name
MJ12Bot
Operator
Majestic
Category
SEO
Kind
BOT
Verification
Verified bot
Cloudflare slug
mj12bot
User-agent patterns
MJ12bot
User-agent string
Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)
Main use cases
SEO analysisBacklink discoverySearch ranking monitoring

Why it crawls your site

MJ12Bot crawls websites to analyze search engine optimization factors and backlinks. It is operated by Majestic as part of their SEO analysis infrastructure. If you see this bot in your server logs, it is a verified crawler and generally safe.

Block or allow MJ12Bot

Block it

Add a Disallow rule for MJ12bot in your robots.txt file. You can also block at the server level using your web server configuration or CDN firewall rules to filter requests matching the user-agent string.

# Block MJ12Bot from crawling your entire site
User-agent: MJ12bot
Disallow: /

# Allow MJ12Bot full access
User-agent: MJ12bot
Allow: /
Allow & verify

Ensure your robots.txt allows MJ12bot. Verify requests are genuine by checking the user-agent string and referring to Majestic's documentation.

Traffic & trends

Cloudflare Radar traffic

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Google Trends interest

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Data sources

This profile is compiled from the following sources.

CloudflareRadar
Last updated July 21, 2026