What is Polar?
Direct Answer: Polar is a webhook service operated by Polar that sends HTTP requests to inform web servers about billing events.
Polar operates a webhook service that sends HTTP requests to web servers to notify them of billing events. The service follows the Standard Webhooks specification and offers built-in webhook signature validation and fully typed webhook payloads. Polar's webhooks also support Slack and Discord formatting for easy in-chat notifications.
User-Agent Identification
The following user-agent strings identify Polar in your live traffic data:
polar.sh webhooks
robots.txt Rules for Polar
Respects robots.txt: No
Robots.txt has limited effect on user-initiated bots
Polar is triggered by user actions within Polar's products. While Polar states it respects robots.txt, the bot operates differently from autonomous crawlers — it fetches specific URLs on demand rather than systematically spidering your site. Server-log monitoring is the only reliable way to verify what actually happens.
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Crawl Behavior
Frequency:On-Demand
Request Pattern:Not Documented
Official Documentation Quotes
"Our webhook implementation follows the Standard Webhooks specification"
Crawl Activity Index
Relative crawl activity for Polar over the past 28 days. Higher values indicate increased crawling intensity compared to the period baseline.
View recent activity data (last 7 days)
| Date | Activity Index |
|---|---|
| Mar 28, 2026 | 30.4 |
| Mar 29, 2026 | 29.8 |
| Mar 30, 2026 | 34.3 |
| Mar 31, 2026 | 34.4 |
| Apr 1, 2026 | 33.7 |
| Apr 2, 2026 | 34.9 |
| Apr 3, 2026 | 33.4 |
Source: Cloudflare Radar
Why track Polar traffic?
Identify and classify unknown crawler activity. Polar may appear in your live traffic data with varying frequency. Tracking its behavior helps you decide whether to allow, throttle, or block it based on actual data.
Protect your crawl budget. Every bot request consumes server resources. Understanding what Polar crawls helps you prioritize the crawlers that matter.
Log Verification
To verify Polar traffic in your live traffic data:
- Search access logs for the user-agent strings listed above
- Check if the IP addresses match documented ranges (if provided by Polar)
- Verify the crawl pattern matches documented behavior
- Use reverse DNS lookup for additional verification if available
Note: Observed behavior in production environments may differ from official documentation. Live traffic monitoring provides the only reliable verification of actual bot behavior.
Undocumented Information
The following information is not officially documented for Polar:
- crawl frequency details
- IP verification method
- JavaScript rendering details
Official Documentation
View Official Polar Documentation →
Information sourced from official documentation. Content generated with AI assistance.