Whitelist us
in 30 seconds.

1. User-Agent string

Our HTTP checks and uptime probes identify themselves with:

VisualSentinelBot/2.0 (+https://visualsentinel.com/bot)

Visual and performance checks use a headless Chrome User-Agent so the rendered page matches what real visitors see. If you need to whitelist headless rendering separately, contact us and we will publish a dedicated UA marker for those checks.

2. Behavior and rate

• Respects a per-customer configurable interval (1, 5, 10, 30 minutes).
• Never runs more than one in-flight check per (monitor, region) tuple.
• Honors robots.txt only for visual and content checks, not for customer-initiated uptime checks (an uptime monitor must probe blocked paths to detect outages).
• Does not follow off-origin links. Each check visits exactly the configured URL.
• Does not execute form submissions or transactional actions.

3. Source IP addresses

All check traffic egresses from the following dedicated IPs. Adding these to your firewall or WAF allowlist is the most reliable way to let visual (screenshot) checks through bot protection, because visual checks run a real Chrome User-Agent and cannot be identified by UA string alone.

• EU region (Helsinki): 157.180.59.176
• US region: 5.78.139.24

The User-Agent string and reverse-DNS hostname remain reliable identification signals for HTTP uptime checks.

4. Whitelisting examples

Cloudflare WAF custom rule

(http.user_agent contains "VisualSentinelBot")
  → Skip: All remaining custom rules

AWS WAF byte-match statement

{
  "FieldToMatch": { "SingleHeader": { "Name": "user-agent" } },
  "PositionalConstraint": "CONTAINS",
  "SearchString": "VisualSentinelBot",
  "TextTransformations": [{ "Priority": 0, "Type": "NONE" }]
}

Nginx conditional bypass

if ($http_user_agent ~* "VisualSentinelBot") {
    set $skip_rate_limit 1;
}

5. Report abuse

If you believe VisualSentinelBot is hitting your infrastructure without a customer having asked us to, email abuse@visualsentinel.com with the domain name, sample requests, and the approximate rate. We will investigate within one business day.