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:

December 26, 2022 - Christmas Day
January 2, 2023 - New Year's Day
January 16, 2023 - Martin Luther King Jr. Day
February 20, 2023 - President's Day
May 29, 2023 - Memorial Day
June 19, 2023 - Juneteenth
July 4, 2023 - Independence Day
September 4, 2023 - Labor Day
October 2, 2023 - Frances Xavier Cabrini Day
November 10, 2023 - Veterans Day
November 23, 2023 - Thanksgiving Day
December 25, 2023 - Christmas Day

Please note that Colorado VSS 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
July 22-23, 2023
August 12-13, 2023
August 19-20, 2023
September 23-24, 2023
November 11-12, 2023
November 18-19, 2023
December 23-24, 2023

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: