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.
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
After you select Register from the ColoradoVSS website, gather all of the information detailed on the Registration Tips page and have a copy of your W-9 available.
Tax Identification Number
When entering your Taxpayer Identification Number (TIN) from your W-9 form, leave out the dashes.
Make sure you enter a valid email address in your User Information.
Make sure you enter Commodity Codes in your User Information, as this will ensure that you receive emails about newly published ColoradoVSS Solicitations.
When searching for Commodity Codes, entering an asterisk (*) before and after each word (or string of words) will yeild more results.
Enter your appropriate Business Types to help the State of Colorado classify your business appropriately.