msrbot

Scraper / HTTP Client Unknown / community maintained robots.txt behaviour unknown

Microsoft Research web crawler bot

User-Agent

Mozilla/5.0 (compatible; msrbot/1.0)

Allow msrbot in robots.txt

User-agent: msrbot
Allow: /

Block msrbot in robots.txt

User-agent: msrbot
Disallow: /

Blocking affects this tool's ability to access your site for its stated purpose.

Official documentation: https://github.com/monperrus/crawler-user-agents

Check your site's bot access

Free dual-engine check: robots.txt verdicts for all 222 bots plus live User-Agent probes. Finds WAF blocks your robots.txt doesn't show.