What is Google-Trust-Services?
Google-Trust-Services is a certificate authority bot that helps build a safer Internet by providing transparent, trusted, and reliable TLS certificates. It crawls websites to verify certificate authenticity and manage secure connections for Google services and users. You can set up Agent Analytics to see when Google-Trust-Services visits your website.
Overview
| Operated By | |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | September 14, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
Google-Trust-Services'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.
Google-Trust-Services's User Agent
| User Agent | Mozilla/5.0 (compatible; Google-Trust-Services/2.0; http://pki.goog/) |
How To Block Google-Trust-Services With Robots.txt
Add this rule to your robots.txt file to block Google-Trust-Services 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: Google-Trust-Services # https://knownagents.com/agents/google-trust-services
Disallow: /Insights for Google-Trust-Services
As of September 14, 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
6% of top websites block Google-Trust-Services in their robots.txts.
Overall Security Scanner Traffic
0.0% of all web traffic came from security scanners.
Frequently Asked Questions
Should I Block Google-Trust-Services?
Usually not, unless you already run your own security scans and want cleaner logs. Google-Trust-Services checks for exposed vulnerabilities, and some services report their findings to site owners at no cost. For context, 6% of the top websites we track currently have robots.txt rules for Google-Trust-Services.
Does Google-Trust-Services Follow Robots.txt Rules?
Yes. Google-Trust-Services 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 Google-Trust-Services respects it.
Does Google-Trust-Services Access Private Content?
It deliberately looks for exposed private content. Google-Trust-Services 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 Google-Trust-Services Is Visiting My Website?
Agent Analytics tracks Google-Trust-Services visits in real time. You can also check your server logs for requests whose user-agent string contains "Google-Trust-Services". Look for bursts of requests to uncommon paths that ordinary visitors rarely access. Because Google-Trust-Services does not publish a verification method, any client can claim its identity and a log match is only a clue.
Why Is Google-Trust-Services Visiting My Website?
Google-Trust-Services 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.