Photo by: Genette Hurt, CDHS, Mesa Verde, Mesa Verde National ParkCortez, CO

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

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.

Click here for VSS system

ColoradoVSS Support

Due to the COVID-19 pandemic, our team has shifted to working remotely.

Monday-Friday from 8:00 a.m. - 5:00 p.m.


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 23-24, 2022 -- February 19-20, 2022

March 19-20, 2022 -- April 23-24, 2022

May 21-22, 2022 -- June 25-26, 2022

July - None -- August 20-21, 2022

September 24-25, 2022 -- October - None

November 19-20, 2022 -- December 24-25, 2022

ColoradoVSS Top 6 Registration Tips.pdf