[Letterhead of Gray Plant Mooty Mooty & Bennett, P.A.]


                                                                     EXHIBIT 5.1



                                February 7, 2002

Webb Interactive Services, Inc.
1899 Wynkoop
Suite 600
Denver, CO 80202

      RE:  Form S-3 Registration Statement

Ladies and Gentlemen:

      This opinion is furnished in connection with the registration, pursuant
to the Securities Act of 1933, as amended, of a maximum of 3,689,680
shares of common stock, no par value (the "Shares"), of Webb Interactive
Services, Inc. ("Webb"), consisting of 367,805 currently outstanding shares,
2,400,000 shares issuable upon the conversion of Webb's Series D Junior
Convertible Preferred Stock and 921,875 shares issuable upon the exercise of
stock purchase warrants issued in connection with the issuance of Webb's Series
B Convertible Preferred Stock and Series D Junior Convertible Preferred Stock
(the Preferred Stock and Warrants being referred to herein as the "Derivative
Securities" and the common stock subject to the Derivative Securities being
referred to herein as the "Derivative Shares").

      We have acted as counsel to Webb in connection with the preparation of
the Form S-3 Registration Statement (the "Registration Statement").  We have
examined the Articles of Incorporation, as amended, the Bylaws of the Company,
such records of proceedings of Webb as we deemed material and such other
certificates, records and documents as we considered necessary for the purposes
of this opinion.

      Based on the foregoing, we are of the opinion that 367,805 outstanding
shares are, and the Derivative Shares when issued in accordance with the terms
of the Derivative Securities will be, legally issued, fully paid and non-
assessable securities of Webb.  We understand that this opinion is to be issued
in connection with the Registration Statement.  We consent to a filing of a copy
of this opinion with the Registration Statement.  We also consent to the
reference to us under the heading "Legal Matters" in the Registration Statement.

                                 Very truly yours,

                                 GRAY, PLANT, MOOTY,
                                  MOOTY & BENNETT, P.A.

                                 /s/  Gray, Plant, Mooty, Mooty & Bennett, P.A.