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What is the Bot (qcbot)?

The Bot, or qcbot, functions as a web crawler for all Online Services which require data to be fetched from and returned to your website. For example, qcbot retrieves images from your site for Image Optimization, and notifies your site when the updated images are ready to be pulled.


qcbot is used for all services except for the CDN. To take full advantage of our services, qcbot may need to make multiple access requests to your website. The bot makes all such requests through a IP, so be sure to add these IPs to your allowlist.

It is crucial that qcbot has unrestricted and unfiltered access for the optimal performance of all services on your site.

Recognizing Bot

The bot will always have a user-agent containing qcbot, as in the following examples: Mobile:

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; qcbot/1.0; + Chrome/ Safari/537.36


Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Mobile Safari/537.36 (compatible; qcbot/1.0; +

Controlling the Bot

The number of requests made by the bot to your website depends on the specific Online Services you use. For instance, the Image Optimization service will request image files on your site, while UCSS, CCSS, and VPI will access all pages.

All requests from qcbot are essential for optimizing your website.

There should be no reason to reduce the number of requests qcbot makes to your site. However, if you wish to do so, the only way is to review the services you have enabled in the LiteSpeed Cache plugin, and disable any unnecessary features.

Last update: January 26, 2024