We are looking for VSS vendors to consider being Change Champions in the upgrade effort for the NEW VSS. Change Champions play an active role in this upgrade and will be a source for improving the vendor experience. If you are interested in helping please sign up!

Photo by: Kelly Brooks, DPA, City and County Building, Denver, CO

Colorado Vendor Self Service (ColoradoVSS) is the vendor-facing component of the CORE system. Most State Agencies and many Institutions of Higher Education are posting solicitations for goods and services as well as construction notices in ColoradoVSS.

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ColoradoVSS Support

Due to the COVID-19 pandemic, our team has shifted to working remotely. Please contact the ColoradoVSS Help Desk:

ColoradoVSS Provides


  • Vendors can register for free and update account information.

  • Vendors do not need to be registered in VSS to view and respond to solicitations.

  • NIGP commodity codes are used to identify products or services offered by vendors.

  • Email notifications (for new solicitations) are sent based on commodity codes selected.

  • In order to ensure the integrity of our vendor records, we verify information through the Internal Revenue Service (IRS).

  • For a complete listing of where solicitations are being posted, please visit the State Purchasing Office website.

System Maintenance Schedule

Please note that ColoradoVSS may not be available on the following weekends due to monthly system maintenance:

January 21-22, 2023 -- February 11-12, 2023

February 18-19, 2023 -- March 18-19, 2023

April 22-23, 2023 -- May 13-14, 2023

May 20-21, 2023 -- June - None

July 22-23, 2023 -- August 12-13, 2023

August 19-20, 2023 -- September 23-24, 2023

October - None -- November 11-12, 2023

November 18-19, 2023 -- December 23-24, 2023

Looking for information on the New VSS Upgrade?


ColoradoVSS Top 6 Registration Tips.pdf

Looking for information on the New VSS Upgrade?