MJ12bot
Builds Majestic's backlink index. Unusually, it's a distributed crawler running on volunteer machines — so genuine MJ12bot requests routinely arrive from residential IPs, which looks like spoofing but isn't.
| robots.txt token | MJ12bot |
| Respects robots.txt | Yes — though distributed nodes can be slow to pick up changes |
| Verification | Residential IPs are expected for the real bot; Cloudflare's verified-bot list covers verifiable nodes |
| Our recommendation | Your call — Same trade as the other SEO crawlers — useful if you use Majestic's data, pure load if you don't. |
Block MJ12bot with robots.txt
User-agent: MJ12bot
Disallow: /robots.txt is a request, not a wall — requests claiming to be MJ12bot from unverified networks should be treated as bad bots. How to verify crawlers by network →
See every MJ12bot request hitting your site — live, with per-bot allow / block / tarpit controls. Try TrafficDATA free (100K page views)