What is TLS tester?
TLS tester is an uncategorized agent. You can set up Agent Analytics to see when TLS tester visits your website.
Category
| Example User Agent | TLS tester from https://testssl.sh/dev/ |
| Source | Official Website |
| Triggered By | Unknown |
| Used for AI Model Training | Unknown |
| Affects AI Chat & Search Visibility | Unknown |
| Expected To Follow Robots.txt | Yes |
Why Is TLS tester Visiting My Website?
TLS tester's purpose has not yet been identified. Until it is categorized or its operator explains it, its behavior on your site is the best evidence of its intent.
Should I Block TLS tester?
Monitor it before deciding. TLS tester has not been categorized, so there is no established behavior profile to rely on. Review which pages it requests and how often, then block it if the traffic is excessive or targets content you would not share with an unidentified bot. For context, 7% of the top websites we track currently have robots.txt rules for TLS tester.
How Do I Block TLS tester Using Robots.txt?
Add this rule to your robots.txt file to block TLS tester from accessing your website, or use Automatic Robots.txt to block all uncategorized agents at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: TLS tester # https://knownagents.com/agents/tls-tester
Disallow: /Insights for TLS tester
As of October 30, 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 Compliance
Country of Origin
Robots.txt Blocked Percentage
Frequently Asked Questions
What Traffic Patterns Should I Expect From TLS tester?
TLS tester does not yet have an established behavior profile. Look for patterns in Agent Analytics: steady, considerate crawling may indicate an unannounced index, while fast, deep sweeps suggest scraping. Its user-agent string and IP addresses may offer the best clues to who operates it.
Does TLS tester Follow Robots.txt Rules?
TLS tester is expected to follow robots.txt rules, so a disallow rule is the appropriate first step if you want to block it. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether TLS tester respects it.
Is TLS tester Used for AI Model Training?
Unknown. TLS tester's operator has not documented enough about its purpose to determine whether collected content is used for AI model training.
Does Blocking TLS tester Affect AI Search or Citations?
Unknown. TLS tester's role is not documented well enough to determine whether blocking it affects AI search results or citations.
Does TLS tester Access Private Content?
Unknown. TLS tester has no established scope, so monitor what it requests. Repeated attempts to reach login or admin paths are a reason to investigate or block it.
How Can I Verify a Request From TLS tester?
Agent Analytics tracks TLS tester visits in real time. You can also check your server logs for requests whose user-agent string contains "TLS tester". Record the paths it requests and how often because no reliable behavior profile exists yet. Because TLS tester does not publish a verification method, any client can claim its identity and a log match is only a clue.