Click the Register button to register a new or existing account.

Vendor Self Service

The ColoradoVSS website allows vendors to manage their account, review and respond to solicitations. Most State agencies and many Institutions of Higher Education post solicitations for goods, services, and construction notices on the ColoradoVSS website

Registration is free. Adding commodity codes during the registration process allows vendors to receive email notifications for new solicitations. Registration instructions are found under the Links section of this page.

For more information on how to do business with the State of Colorado, please click on the ACCESSColorado link at the top of the page.

We recommend using Microsoft Edge as your preferred internet browser for VSS. If you experience performance issues with VSS and Edge, please contact us at, indicating which version of Edge you are using, as well as any specific functionality issues.

In order for your bid to be processed, you will need to submit your bid before the "Closing On" deadline. If you began your bid before the closing time but submit it even one second after the 'Closing On' date and time, you will get an error message as the bidding has closed. Please plan enough time to submit your bid and contact the Buyer for any questions.

The ColoradoVSS Help Desk is available Monday through Friday from 8:00 a.m. to 5:00 p.m. MT by email:


NOTICE: Please contact the VSS Help Desk by email at for all your questions and concerns.

Please note, the Colorado VSS Help Desk will not be available on the following dates:

January 1, 2024 - New Year's Day
January 15, 2024 - Martin Luther King Jr. Day
February 19, 2024 - President's Day
May 27, 2024 - Memorial Day
June 19, 2024 - Juneteenth
July 4, 2024 - Independence Day
September 2, 2024 - Labor Day
October 7, 2024 - Frances Xavier Cabrini Day
November 11, 2024 - Veterans Day
November 28, 2024 - Thanksgiving Day
December 25, 2024 - Christmas Day

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

January 13-14, 2024
January 20-21, 2024
February 24-25, 2024
March 23-24, 2024
April 13-14, 2024
April 20-21, 2024
May 25-26, 2024
June 22-23, 2024
July 13-14, 2024
August 24-25, 2024
September 14-15, 2024
September 21-22, 2024
October 12-13, 2024
October 19-20, 2024
November 23-24, 2024
December 14-15, 2024
December 21-22, 2024

Posted 12/12/2022:Please note that bidding opportunities with the Colorado Department of Transportation (CDOT) are done through the CDOT Supplier BidNet Direct. Additional information and registration details can be found on the CDOT Business Center Website:

View All Announcements


Click on the links below to access the ColoradoVSS Help site: