Photo by: Curtis Drew, CDLE, Union Station at Night, Denver

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.  Please contact the ColoradoVSS Help Desk:   

ColoradoVSS Provides


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