Flex UI Requirements

In order to comfortably run the Flex UI, an agent's computer must meet the following requirements:

CPU RAM Screen resolution
Minimum 1Ghz 1024Mb 1024x768

Software Requirements

Operating System Windows 7 and 10, MacOS, or Linux Ubuntu/Mint 64bit.
Browser An up-to-date version of Google Chrome.

Network Requirements

This table shows the minimum recommended bandwidth for running Flex UI without significant effect on performance

Bandwidth Packets Dropped Delay


200 kb/s 20% 200 ms

This table shows the domains that should be allowlisted by VPNs & Proxies to ensure proper access to the Flex UI.




Used by a variety of Twilio Services, including ones related to Flex.


Used by Flex Insights


Used to serve static assets that we provide. This is commonly used for items such as SDK versions or standard media files


Used by Twilio Functions product. It's standard practice for many of our customers to use a Twilio Function and access them from Flex

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