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What ports does the Add-in communicate over?

Written by Tom Berrett

Updated at June 30th, 2025

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Table of Contents

What ports does the Add-in communicate over?

What ports does the Add-in communicate over?

The API’s that the Add-in communicates via are RESTful, given all communication is via a TLS channel, all traffic uses port 443. 

Does the user installing the Add-in need to be local Administrator on their PC? 

No. The Add-in is installed to the users profile by default which does not require admin privileges. 

add-in ports communication ports

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  • How can I configure ports and firewalls following download and login to the Excel Add-in to connect and retrieve reference data from Fastmarkets?
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  • Does the Add-in encrypt traffic/data between the Add-in and Fastmarkets backend servers?

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