What is AlertSite?
AlertSite is SmartBear's synthetic monitoring service that uses automated probes to monitor website availability, performance, and functionality from global monitoring locations. You can set up Agent Analytics to see when AlertSite visits your website.
Overview
| Operated By | SmartBear |
| Source | Official Website |
| Expected To Follow Robots.txt | No |
| Insights Last Updated | September 15, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
AlertSite's traffic often follows fixed intervals like a cron job. Activity may consist of short recurring checks or occasional intensive bursts, but it usually remains limited to a specific set of pages or endpoints.
AlertSite's User Agent
| User Agent | AlertSite (https://smartbear.com/product/alertsite/overview/) |
How To Block AlertSite With Robots.txt
Add this rule to your robots.txt file to request that AlertSite not access your website, or use Automatic Robots.txt to request the same of all developer helpers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: AlertSite # https://knownagents.com/agents/alertsite
Disallow: /Insights for AlertSite
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 AlertSite in their robots.txts.
Overall Developer Helper Traffic
0.8% of all web traffic came from developer helpers.
Frequently Asked Questions
Should I Block AlertSite?
Only if no one on your team relies on it. AlertSite may support uptime monitoring, performance tests, or audits. Blocking it without checking first can silently disrupt those workflows. For context, 7% of the top websites we track currently have robots.txt rules for AlertSite.
Does AlertSite Follow Robots.txt Rules?
No. AlertSite is not expected to follow robots.txt rules, so a disallow rule only communicates your preference. Enforce the block with firewall or server rules, then use Agent Analytics to verify that its requests stop.
Does AlertSite Access Private Content?
Only when configured with access. A team may grant AlertSite credentials to monitor staging sites or private health endpoints. Without those credentials, it sees only public pages.
How Can I Tell if AlertSite Is Visiting My Website?
Agent Analytics tracks AlertSite visits in real time. You can also check your server logs for requests whose user-agent string contains "AlertSite". Look for repeated checks of the same pages or endpoints at regular intervals. Because AlertSite does not publish a verification method, any client can claim its identity and a log match is only a clue.
Why Is AlertSite Visiting My Website?
Someone, most likely on your own team, configured AlertSite to check your site. Uptime monitors, performance testers, and audit tools visit only the sites or endpoints they are told to watch.