DatadogSynthetics
Datadog synthetics web crawler bot
About this crawler
DatadogSynthetics is a web crawler identified by the regular-expression pattern DatadogSynthetics in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block DatadogSynthetics traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- DatadogSynthetics
- Pattern
DatadogSynthetics- Tags
- monitoring
- Reference
- https://docs.datadoghq.com/synthetics/
- Added
- 2025/08/19
- rDNS suffixes
.datadog.com,.datadoghq.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely DatadogSynthetics with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.datadog.com.datadoghq.com
Sample User-Agent strings
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.7204.168 Safari/537.36 DatadogSynthetics
Block this crawler
robots.txt — disallow DatadogSynthetics:
User-agent: DatadogSynthetics
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} DatadogSynthetics [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "DatadogSynthetics") {
return 403;
}
← back to all crawlers