What is AccessibleWebBot?
AccessibleWebBot is a web crawler that scans customer websites to monitor accessibility violations and ensure WCAG compliance as part of Accessible Web's RAMP monitoring service. You can set up Agent Analytics to see when AccessibleWebBot visits your website.
Overview
| Operated By | Accessible Web |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | September 15, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
AccessibleWebBot's cadence depends on how the scan is configured. Continuous monitoring may run daily or hourly, while a one-time or internet-wide scan may sweep once and disappear.
AccessibleWebBot's User Agent
| User Agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; AccessibleWebBot/1.0; +https://accessibleweb.com/bot/) HeadlessChrome/151.0.7922.173 Safari/537.36 |
How To Block AccessibleWebBot With Robots.txt
Add this rule to your robots.txt file to block AccessibleWebBot from accessing your website, or use Automatic Robots.txt to block all security scanners at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: AccessibleWebBot # https://knownagents.com/agents/accessiblewebbot
Disallow: /
Insights for AccessibleWebBot
As of September 15, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
7% of top websites block AccessibleWebBot in their robots.txts.
Overall Security Scanner Traffic
0.0% of all web traffic came from security scanners.
Frequently Asked Questions
Should I Block AccessibleWebBot?
Usually not, unless you already run your own security scans and want cleaner logs. AccessibleWebBot checks for exposed vulnerabilities, and some services report their findings to site owners at no cost. For context, 7% of the top websites we track currently have robots.txt rules for AccessibleWebBot.
Does AccessibleWebBot Follow Robots.txt Rules?
Yes. AccessibleWebBot is expected to follow robots.txt rules, so a disallow rule is the appropriate first step. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether AccessibleWebBot respects it.
Does AccessibleWebBot Access Private Content?
It deliberately looks for exposed private content. AccessibleWebBot tests login pages, admin panels, and API endpoints for vulnerabilities. Probing does not mean it gained access, but you should expect requests to sensitive paths in your logs.
How Can I Tell if AccessibleWebBot Is Visiting My Website?
Agent Analytics tracks AccessibleWebBot visits in real time. You can also check your server logs for requests whose user-agent string contains "AccessibleWebBot". Look for bursts of requests to uncommon paths that ordinary visitors rarely access. Because AccessibleWebBot does not publish a verification method, any client can claim its identity and a log match is only a clue.
Why Is AccessibleWebBot Visiting My Website?
AccessibleWebBot is scanning your site for vulnerabilities, either as part of an internet-wide sweep or because someone requested an assessment of your domain. Recurring visits often indicate that a monitoring service has added your site to its checks.