Photo by: Julie Arington - DNR Spring Columbine

Due to the COVID-19 pandemic, our team has shifted to working remotely. As a result, we are not able to take initial issue contact via telephone. Please contact the ColoradoVSS Help Desk by email at We appreciate your patience and understanding.

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

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, 2021 -- February 20-21, 2021

March 13-14, 2021 -- April 24-25, 2021

May 22-23, 2021 -- June 19-20, 2021

July 24-25, 2021 -- August 21-22, 2021

September 25-26, 2021 -- October 23-24, 2021

November 20-21, 2021 -- December 25-26, 2021