HEALTHDESK CORPORATION

                            A California Corporation


                                       and



                    AMERICAN STOCK TRANSFER AND TRUST COMPANY
                                  Warrant Agent


                                       and

                           WHALE SECURITIES CO., L.P.
                                   Underwriter




                                WARRANT AGREEMENT











                                Table of Contents
                                ------------------

Section                                                                Page
- -------                                                                ----
   1        Appointment of Warrant Agent ...................           1

   2        Form of Warrant ...............................            2

   3        Countersignature and Registration ..............           3

   4        Transfers and Exchanges ........................           3

   5        Exercise of Warrants; Payment of Warrant
              Solicitation Fee  ............................           4

   6        Payment of Taxes ...............................           8

   7        Mutilated or Missing Warrants ..................           9

   8        Reservation of Common Stock ....................           9

   9        Warrant Price; Adjustments .....................           11

   10       Fractional Interest ............................           18

   11       Notices to Warrantholders ......................           18

   12       Disposition of Proceeds on Exercise of
            Warrants .......................................           20

   13       Redemption of Warrants .........................           21

   14       Merger or Consolidation or Change of Name
            of Warrant Agent ...............................           21

   15       Duties of Warrant Agent ........................           22

   16       Change of Warrant Agent ........................           26

   17       Identity of Transfer Agent .....................           27

   18       Notices ........................................           27

   19       Supplements and Amendments .....................           29

   20       New York Contract ..............................           29

   21       Benefits of this Agreement .....................           30

   22       Successors .....................................           30

            Exhibit A - Form of Warrant ....................










                  WARRANT AGREEMENT dated as of __________, 1997, by and among 
HealthDesk Corporation, a Washington corporation (the "Company"), Whale 
Securities, Co., L.P. (the "Underwriter") and American Stock Transfer and Trust
Company, as warrant agent (hereinafter called the "Warrant Agent").
                  WHEREAS, the Company proposes to issue and sell to the public
up to 1,800,000 shares of the common stock of the Company, no par value
(hereinafter, together with the stock of any other class to which such shares
may hereafter have been changed, called "Common Stock"), and up to 1,800,000
Common Stock Purchase Warrants (the "Warrants");
                  WHEREAS, each Warrant will entitle the holder to pur-
chase one share of Common Stock;
                  WHEREAS, the Company desires the Warrant Agent to act on
behalf of the Company, and the Warrant Agent is willing to so act, in connection
with the issuance, registration, transfer, exchange and exercise of the
Warrants;
                  NOW, THEREFORE, in consideration of the premises and the
mutual agreements herein set forth, the parties hereto agree as follows:
                  Section 1. Appointment of Warrant Agent. The Company hereby
appoints the Warrant Agent to act as Warrant Agent for the Company in accordance
with the instructions hereinafter set forth in this Agreement, and the Warrant
Agent hereby accepts such appointment.








                  Section 2. Form of Warrant. The text of the Warrants and of
the form of election to purchase Common Stock to be printed on the reverse
thereof shall be substantially as set forth in Exhibit A attached hereto. Each
Warrant shall entitle the registered holder thereof to purchase one share of
Common Stock at a purchase price of five Dollars ($5.00), at any time from
___________, 1998 until 5:00 p.m. Eastern time, on __________, 2002 (the
"Warrant Exercise Period"). The warrant price and the number of shares of Common
Stock issuable upon exercise of the Warrants are subject to adjustment upon the
occurrence of certain events, all as hereinafter provided. The Warrants shall be
executed on behalf of the Company by the manual or facsimile signature of the
present or any future Chief Executive Officer, President or Vice President of
the Company, attested to by the manual or facsimile signature of the present or
any future Secretary or Assistant Secretary of the Company.
                  Warrants shall be dated as of the issuance by the Warrant
Agent either upon initial issuance or upon transfer or exchange.
                  In the event the aforesaid expiration dates of the Warrants
fall on a Saturday or Sunday, or on a legal holiday on which the New York Stock
Exchange is closed, then the Warrants shall expire at 5:00 p.m. Eastern time on
the next succeeding business day.

                                       -2-








                  Section 3. Countersignature and Registration. The Warrant
Agent shall maintain books for the transfer and registration of the Warrants.
Upon the initial issuance of the Warrants, the Warrant Agent shall issue and
register the Warrants in the names of the respective holders thereof. The
Warrants shall be countersigned manually or by facsimile by the Warrant Agent
(or by any successor to the Warrant Agent then acting as warrant agent under
this Agreement) and shall not be valid for any purpose unless so countersigned.
Warrants may, however, be so countersigned by the Warrant Agent (or by its
successor as 6 Warrant Agent) and be delivered by the Warrant Agent,
notwithstanding that the persons whose manual or facsimile signatures appear
thereon as proper officers of the Company shall have ceased to be such officers
at the time of such countersignature or delivery.
                  Section 4. Transfers and Exchanges. The Warrant Agent shall
transfer, from time to time, any outstanding Warrants upon the books to be
maintained by the Warrant Agent for that purpose, upon surrender thereof for
transfer properly endorsed or accompanied by appropriate instructions for
transfer. Upon any such transfer, a new Warrant shall be issued to the
transferee and the surrendered Warrant shall be cancelled by the Warrant Agent.
Warrants so cancelled shall be delivered by the Warrant Agent to the Company
from time to time upon request. Warrants may be exchanged at the option of the
holder thereof, when surrendered at the office of the Warrant Agent, for another

                                      -3-



Warrant, or other Warrants of different denominations of like tenor and 
representing in the aggregate the right to purchase a like number of shares of 
Common Stock.
                  Section 5.  Exercise of Warrants; Payment of Warrant
Solicitation Fee.
                      (a) Subject to the provisions of this
Agreement, each registered holder of Warrants shall have the right, which may be
exercised commencing at the opening of business on the first day of the Warrant
Exercise Period, to purchase from the Company (and the Company shall issue and
sell to such registered holder of Warrants) the number of fully paid and
non-assessable shares of Common Stock specified in such Warrants upon surrender
of such Warrants to the Company at the office of the Warrant Agent, with the
form of election to purchase on the reverse thereof duly filled in and signed,
and upon payment to the Company of the warrant price, determined in accordance
with the provisions of Sections 9 and 10 of this Agreement, for the number of
shares of Common Stock in respect of which such Warrants are then exercised.
Payment of such warrant price shall be made in cash or by certified check or
bank draft to the order of the Company. Subject to Section 6, upon such
surrender of Warrants and payment of the warrant price, the Company shall issue
and cause to be delivered with all reasonable dispatch to or upon the written
order of the registered holder of such Warrants and in such name or names as

                                      -4-


such registered holder may designate, a certificate or certificates for the
number of full shares of Common Stock so purchased upon the exercise of such
Warrants. Such certificate or certificates shall be deemed to have been issued,
and any person so designated to be named therein shall be deemed to have become
a holder of record of such shares of Common Stock, as of the date of the
surrender of such Warrants and payment of the warrant price as aforesaid. The
rights of purchase represented by the Warrants shall be exercisable, at the
election of the registered holders thereof, either as an entirety or from time
to time for a portion of the shares specified therein and, in the event that any
Warrant is exercised in respect of less than all of the shares of Common Stock
specified therein at any time prior to the date of expiration of the Warrants, a
new Warrant or Warrants will be issued to the registered holder for the
remaining number of shares of Common Stock specified in the Warrant so
surrendered, and the Warrant Agent is hereby irrevocably authorized to
countersign and to deliver the required new Warrants pursuant to the provisions
of this Section and of Section 3 of this Agreement and the Company, whenever
requested by the Warrant Agent, will supply the Warrant Agent with Warrants duly
executed on behalf of the Company for such purpose. Anything in the foregoing to
the contrary notwithstanding, no Warrant will be exercisable unless at the time
of exercise the Company has filed with the Securities and Exchange Commission a

                                      -5-


registration statement under the Securities Act of 1933, as amended (the "Act"),
covering the shares of Common Stock issuable upon exercise of such Warrant and
such shares have been so registered or qualified or deemed to be exempt under
the securities laws of the state of residence of the holder of such Warrant. The
Company shall use its best efforts to have all shares so registered or qualified
on or before the date on which the Warrants become exercisable. 
                      (b) If at the time of exercise of any Warrant after (i)
________, 1998 (i) the market price of the Company's Common Stock is equal to or
greater than the then purchase price of the Warrant, (ii) the exercise of the
Warrant is solicited by the Underwriter at such time while the Underwriter is a
member of the National Association of Securities Dealers, Inc. ("NASD"), (iii)
the Warrant is not held in a discretionary account, (iv) disclosure of the
compensation arrangement is made in documents provided to the holders of the
Warrants; and (v) the solicitation of the exercise of the Warrant is not in
violation of Rule 10b-6 (as such rule or any successor rule may be in effect as
of such time of exercise) promulgated under the Securities Exchange Act of 1934,
then the Underwriter shall be entitled to receive from the Company upon exercise
of each of the Warrant(s) so exercised a fee of five percent (5%) of the
aggregate price of the Warrants so exercised (the "Exercise Fee"). The
procedures for payment of the warrant solicitation fee are set forth in Section
5(c) below.

                                      -6-



                      (c) (1) Within five (5) days of the last day of each month
commencing with _______, 1998 the Warrant Agent will notify the Underwriter of
each Warrant Certificate which has been properly completed for exercise by
holders of Warrants during the last month. The Company and Warrant Agent shall
determine, in their sole and absolute discretion, whether a Warrant Certificate
has been properly completed. The Warrant Agent will provide the Underwriter with
such information, in connection with the exercise of each Warrant, as the
Underwriter shall reasonably request.
                                    (2) The Company hereby authorizes and
instructs the Warrant Agent to deliver to the Underwriter the Exercise Fee
promptly after receipt by the Warrant Agent from the Company of a check payable
to the order of the Underwriter in the amount of the Exercise Fee. The Warrant
Agent shall not issue the shares of Common Stock issuable upon exercise of the
Warrants until receipt and forwarding of such check to the Underwriter. In the
event that an Exercise Fee is paid to the Underwriter with respect to a Warrant
which the Company or the Warrant agent determines is not properly completed for
exercise or in respect of which the Underwriter is not entitled to an Exercise
Fee, the Underwriter will promptly return such Exercise Fee to the Warrant Agent
which shall forthwith return such fee to the Company.

                                       -7-






                  The Underwriter and the Company may at any time, after
____________, 1998, and during business hours, examine the records of the
Warrant Agent, including its ledger of original Warrant certificates returned to
the Warrant Agent upon exercise of Warrants. Notwithstanding any provision to
the contrary, the provisions of paragraphs 5(b) and 5(c) may not be modified,
amended or deleted without the prior written consent of the Underwriter.
                  Section 6. Payment of Taxes. The Company will pay any
documentary stamp taxes attributable to the initial issuance of Common Stock
issuable upon the exercise of Warrants; provided, however, that the Company
shall not be required to pay any tax which may be payable in respect of any
transfer involved in the issue or delivery of any certificates of shares of
Common Stock in a name other than that of the registered holder of Warrants in
respect of which such shares are issued, and in such case neither the Company
nor the Warrant Agent shall be required to issue or deliver any certificate for
shares of Common Stock or any Warrant until the person requesting the same has
paid to the Company the amount of such tax or has established to the Company's
satisfaction that such tax has been paid.
                  Section 7. Mutilated or Missing Warrants. In case any of the
Warrants shall be mutilated, lost, stolen or destroyed, the Company may, in
its discretion, issue and the Warrant Agent shall countersign and deliver in
exchange and substitution for and upon cancellation of the mutilated Warrant,
or in lieu of and in substitution for the Warrant lost, stolen or destroyed, a
new Warrant of like tenor and representing an equivalent right or interest, but
only upon receipt of evidence satisfactory to the Company and the Warrant Agent

                                      -8-


of such loss, theft or destruction and, in case of a lost, stolen or destroyed
Warrant, indemnity, if requested, also satisfactory to them. Applicants for such
substitute Warrants shall also comply with such other reasonable regulations and
pay such reasonable charges as the Company or the Warrant Agent may prescribe.
                  Section 8. Reservation of Common Stock. There have been
reserved, and the Company shall at all times keep reserved, out of the
authorized and unissued shares of Common Stock, a number of shares of Common
Stock sufficient to provide for the exercise of the rights of purchase
represented by the Warrants, and the transfer agent for the shares of Common
Stock and every subsequent transfer agent for any shares of the Company's Common
Stock issuable upon the exercise of any of the rights of purchase aforesaid are
irrevocably authorized and directed at all times to reserve such number of
authorized and unissued shares of Common Stock as shall be required for such
purpose. The Company agrees that all shares of Common Stock issued upon exercise
of the Warrants shall be, at the time of delivery of the certificates of such
shares, validly issued and outstanding, fully paid and non-assessable and listed
on any national securities exchange upon which the other shares of Common Stock
are then listed. So long as any unexpired Warrants remain outstanding, the
Company will file such post-effective amendments to the registration statement
(Form SB-2, Registration No. 333-14519) (the "Registration Statement") filed
pursuant to the Act with respect to the Warrants (or other appropriate
registration statements or post-effective amendment or supplements) as may be
necessary to permit it to deliver to each person exercising a Warrant, a
prospectus meeting the requirements of Section 10(a)(3) of the Act and otherwise

                                      -9-



complying therewith, and will deliver such a prospectus to each such person. To
the extent that during any period it is not reasonably likely that the Warrants
will be exercised, due to market price or otherwise, the Company need not file
such a post-effective amendment during such period. The Company will keep a copy
of this Agreement on file with the transfer agent for the shares of Common Stock
and with every subsequent transfer agent for any shares of the Company's Common
Stock issuable upon the exercise of the rights of purchase represented by the
Warrants. The Warrant Agent is irrevocably authorized to requisition from time
to time from such transfer agent stock certificates required to honor
outstanding Warrants. The Company will supply such transfer agent with duly
executed stock certificates for that purpose. All Warrants surrendered in the
exercise of the rights thereby evidenced shall be cancelled by the Warrant Agent
and shall thereafter be delivered to the Company, and such cancelled Warrants

                                      -10-



shall constitute sufficient evidence of the number of shares of Common Stock
which have been issued upon the exercise of such Warrants. Promptly after the
date of expiration of the Warrants, the Warrant Agent shall certify to the
Company the total aggregate amount of Warrants then outstanding, and thereafter
no shares of Common Stock shall be subject to reservation in respect of such
Warrants which shall have expired.

                  Section 9.  Warrant Price; Adjustments.
                           (a)  The warrant price at which Common Stock shall
be purchasable upon the exercise of the Warrants shall be $5.00 per share or
after adjustment, as provided in this Section, shall be such price as so
adjusted (the "Warrant Price").
                           (b) The Warrant Price shall be subject to adjustment
from time to time as follows:
                                    (i)  In case the Company shall at any time
after the date hereof pay a dividend in shares of Common Stock or make a
distribution in shares of Common Stock, then upon such dividend or distribution
the Warrant Price in effect immediately prior to such dividend or distribution
shall forthwith be reduced to a price determined by dividing:
                                            (A)  an amount equal to the total 
number of shares of Common Stock outstanding immediately prior to such dividend
or distribution multiplied by the Warrant Price in effect immediately prior to
such dividend or distribution, by

                                      -11-






                                            (B)  the total number of shares of
Common Stock outstanding immediately after such issuance or sale.
                                    For the purposes of any computation to be
made in accordance with the provisions of this Section 9(b)(i), the following
provisions shall be applicable: Common Stock issuable by way of dividend or
other distribution on any stock of the Company shall be deemed to have been
issued immediately after the opening of business on the date following the date
fixed for the determination of stockholders entitled to receive such dividend or
other distribution.
                                    (ii)  In case the Company shall at any time
subdivide or combine the outstanding Common Stock, the Warrant Price shall
forthwith be proportionately decreased in the case of subdivision or increased
in the case of combination to the nearest one cent. Any such adjustment shall
become effective at the time such subdivision or combination shall become
effective.
                                    (iii) Within a reasonable time after the
close of each quarterly fiscal period of the Company during which the Warrant
Price has been adjusted as herein provided, the Company shall:
                                            (A)  file with the Warrant Agent a
certificate signed by the Chief Executive Officer, President or Vice President 
of the Company and by the Treasurer or Assistant Treasurer or the Secretary or 
an Assistant Secretary of the Company, showing in detail the facts requiring 
all such adjustments occurring during such period and the Warrant Price
after each such adjustment; and

                                      -12-


                                            (B)  the Warrant Agent shall have no
duty with respect to any such certificate filed with it except to keep the same
on file and available for inspection by holders of Warrants during reasonable
business hours, and the Warrant Agent may conclusively rely upon the latest
certificate furnished to it hereunder. The Warrant Agent shall not at any time
be under any duty or responsibility to any holder of a Warrant to determine
whether any facts exist which may require any adjustment of the Warrant Price,
or with respect to the nature or extent of any adjustment of the Warrant Price
when made, or with respect to the method employed in making any such adjustment,
or with respect to the nature or extent of the property or securities
deliverable hereunder. In the absence of a certificate having been furnished,
the Warrant Agent may conclusively rely upon the provisions of the Warrants with
respect to the Common Stock deliverable upon the exercise of the Warrants and
the applicable Warrant Price thereof.

                                            (iv) Notwithstanding anything
contained herein to the contrary, no adjustment of the Warrant Price shall be
made if the amount of such adjustment shall be less than $.05, but in such case
any adjustment that would otherwise be required then to be made shall be carried

                                      -13-


forward and shall be made at the time and together with the next subsequent
adjustment which, together with any adjustment so carried forward, shall amount
to not less than $.02.
                           (v)  In the event that the number of outstanding
shares of Common Stock is increased by a stock dividend payable in Common Stock
or by a subdivision of the outstanding Common Stock, then, from and after the
time at which the adjusted Warrant Price becomes effective pursuant to
Subsection (b) of this Section by reason of such dividend or subdivision, the
number of shares of Common Stock issuable upon the exercise of each Warrant
shall be increased in proportion to such increase in outstanding shares. In the
event that the number of shares of Common Stock outstanding is decreased by a
combination of the outstanding Common Stock, then, from and after the time at
which the adjusted Warrant Price becomes effective pursuant to this Section 9(b)
by reason of such combination, the number of shares of Common Stock issuable
upon the exercise of each Warrant shall be decreased in proportion to such
decrease in the outstanding shares of Common Stock.
                           (vi) In case of any reorganization or
reclassification of the outstanding Common Stock (other than a change in par
value, or from par value to no par value, or as a result of a subdivision or
combination), or in case of any consolidation of the Company with, or merger of
the Company into, another corporation (other than a consolidation or merger in
which the Company is the continuing corporation and which does not result in any

                                      -14-


reclassification of the outstanding Common Stock), or in case of any sale or
conveyance to another corporation of the property of the Company as an entirety
or substantially as an entirety, the holder of each Warrant then outstanding
shall thereafter have the right to purchase the kind and amount of shares of
Common Stock and other securities and property receivable upon such
reorganization, reclassification, consolidation, merger, sale or conveyance by a
holder of the number of shares of Common Stock which the holder of such Warrant
shall then be entitled to purchase; such adjustments shall apply with respect to
all such changes occurring between the date of this Warrant Agreement and the
date of exercise of such Warrant.
                           (vii) Subject to the provisions of this Section 9, in
case the Company shall, at any time prior to the exercise of the Warrants, make
any distribution of its assets to holders of its Common Stock as a liquidating
or a partial liquidating dividend, then the holder of Warrants who exercises its
Warrants after the record date for the determination of those holders of Common
Stock entitled to such distribution of assets as a liquidating or partial
liquidating dividend shall be entitled to receive for the Warrant Price per
Warrant, in addition to each share of Common Stock, the amount of such
distribution (or, at the option of the Company, a sum equal to the value of any

                                      -15-


such assets at the time of such distribution as determined by the Board of
Directors of the Company in good faith), which would have been payable to such
holder had he been the holder of record of the Common Stock receivable upon
exercise of its Warrant on the record date for the determination of those
entitled to such distribution.
                           (viii) In case of the dissolution, liquidation or
winding up of the Company, all rights under the Warrants shall terminate on a
date fixed by the Company, such date to be no earlier than ten (10) days prior
to the effectiveness of such dissolution, liquidation or winding up and not
later than five (5) days prior to such effectiveness. Notice of such termination
of purchase rights shall be given to the last registered holder of the Warrants,
as the same shall appear on the books of the Company maintained by the Warrant
Agent, by registered mail at least thirty (30) days prior to such termination
date.
                           (ix) In case the Company shall, at any time prior to
the expiration of the Warrants and prior to the exercise thereof, offer to the
holders of its Common Stock any rights to subscribe for additional shares of any
class of the Company, then the Company shall give written notice thereof to the
last registered holder thereof not less than thirty (30) days prior to the date
on which the books of the Company are closed or a record date is fixed for the
determination of the stockholders entitled to such subscription rights. Such
notice shall specify the date as to which the books shall be closed or record

                                      -16-


date fixed with respect to such offer of subscription and the right of the
holder thereof to participate in such offer of subscription shall terminate if
the Warrant shall not be exercised on or before the date of such closing of the
books or such record date.
                           (x) Any adjustment pursuant to the aforesaid
provisions of this Section 9 shall be made on the basis of the number of shares
of Common Stock which the holder thereof would have been entitled to acquire by
the exercise of the Warrant immediately prior to the event giving rise to such
adjustment.
                           (xi)  Irrespective of any adjustments in the
Warrant Price or the number or kind of shares purchasable upon exercise of the
Warrants, Warrants previously or thereafter issued may continue to express the
same price and number and kind of shares as are stated in the similar Warrants
initially issuable pursuant to this Warrant Agreement.
                           (xii)  The Company may retain a firm of
independent public accountants (who may be any such firm regularly employed by
the Company) to make any computation required under this Section 9, and any
certificate setting forth such computation signed by such firm shall be
conclusive evidence of the correctness of any computation made under this
Section 9.
                           (xiii)  If at any time, as a result of an
adjustment made pursuant to Section 9(b)(vi) above, the holders of a Warrant or
Warrants shall become entitled to purchase any securities other than shares of
Common Stock, thereafter the number of such securities so purchasable upon
exercise of each Warrant and the Warrant Price for such shares shall be subject

                                      -17-


to adjustment from time to time in a manner and on terms as nearly equivalent 
as practicable to the provisions with respect to the Common Stock contained in 
Sections 9(b)(ii) through (v).
                  Section 10. Fractional Interest. The Warrants may only be
exercised to purchase full shares of Common Stock and the Company shall not be
required to issue fractions of shares of Common Stock on the exercise of
Warrants. However, if a Warrant holder exercises all Warrants then owned of
record by it and such exercise would result in the issuance of a fractional
share, the Company will pay to such Warrant holder, in lieu of the issuance of
any fractional share otherwise issuable, an amount of cash based on the market
value of the Common Stock of the Company on the last trading day prior to the
exercise date.
                  Section 11.  Notices to Warrantholders.
                           (a) Upon any adjustment of the Warrant Price and the
number of shares of Common Stock issuable upon exercise of a Warrant, then and
in each such case the Company shall give written notice thereof to the Warrant
Agent, which notice shall state the Warrant Price resulting from such adjustment
and the increase or decrease, if any, in the number of shares purchasable at
such price upon the exercise of a Warrant, setting forth in reasonable detail
the method of calculation and the facts upon which such calculation is based.
The Company shall also mail such notice to the holders of the Warrants at their

                                      -18-


addresses appearing in the Warrant register. Failure to give or mail such
notice, or any defect therein, shall not affect the validity of the adjustments.
                           (b)  In case at any time:
                                    (i)  the Company shall pay dividends payable
in stock upon its Common Stock or make any distribution (other than regular cash
dividends) to the holders of its Common Stock; or
                                    (ii)  the Company shall offer for subscrip-
tion pro rata to the holders of its Common Stock any additional
shares of stock of any class or other rights; or
                                    (iii)  there shall be any capital reorgani-
zation or reclassification of the capital stock of the Company, or consolidation
or merger of the Company with, or sale or substantially all of its assets to,
another corporation; or
                                    (iv)  there shall be a voluntary or involun-
tary dissolution, liquidation or winding up of the Company; then in any one or
more of such cases, the Company shall give written notice in the manner set
forth in Section 11(a) of the date on which (A) a record shall be taken for such
dividend, distribution or subscription rights, or (B) such reorganization,
reclassification, consolidation, merger, sale, dissolution, liquidation or
winding up shall take place, as the case may be. Such notice shall also specify
the date as of which the holders of Common Stock of record shall participate in
such dividend, distribution or subscription rights, or shall be entitled to

                                      -19-


exchange their Common Stock for securities or other property deliverable upon
such reorganization, reclassification, consolidation, merger, sale, dissolution,
liquidation or winding up as the case may be. Such notice shall be given at
least thirty (30) days prior to the action in question and not less than thirty
(30) days prior to the record date in respect thereof. Failure to give such
notice, or any defect therein, shall not affect the legality or validity of any
of the matters set forth in this Section 11(b).
                           (c) The Company shall cause copies of all financial
statements and reports, proxy statements and other documents that are sent to
its stockholders to be sent by first-class mail, postage prepaid, on the date of
mailing to such stockholders, to each registered holder of Warrants at his
address appearing in the warrant register as of the record date for the
determination of the stockholders entitled to such documents.
                  Section 12.  Disposition of Proceeds on Exercise of
Warrants.
                           (i)  The Warrant Agent shall promptly forward to
the Company all monies received by the Warrant Agent for the purchase of shares
of Common Stock through the exercise of such Warrants.
                (ii) The Warrant Agent shall keep copies of this
Agreement available for inspection by holders of Warrants during normal business
hours.

                                      -20-





                  Section 13. Redemption of Warrants. The Warrants are
redeemable by the Company upon the consent of the Underwriter, in whole or in
part, on not less than thirty (30) days' prior written notice at a redemption
price of $.10 per Warrant at any time commencing _________, 1998; provided that
(i) the closing sale price of the Common Stock on all thirty (30) trading days
ending on the third day prior to the day on which the Company gives notice of
redemption has been at least 150% of the then effective exercise price of the
Warrants (the "Target Redemption Price") and ii) the Warrants are currently
exercisable]. The redemption notice shall be mailed to the holders of the
Warrants at their addresses appearing in the Warrant register. Holders of the
Warrants will have exercise rights until the close of business on the date fixed
for redemption.
                  Section 14. Merger or Consolidation or Change of Name of
Warrant Agent. Any corporation or company which may succeed to the corporate
trust business of the Warrant Agent by any merger or consolidation or otherwise
shall be the successor to the Warrant Agent hereunder without the execution or
filing of any paper or any further act on the part of any of the parties hereto,
provided that such corporation would be eligible to serve as a successor Warrant
Agent under the provisions of Section 16 of this Agreement. In case at the time
such successor to the Warrant Agent shall succeed to the agency created by this

                                      -21-


Agreement, any of the Warrants shall have been countersigned but not delivered,
any such successor to the Warrant Agent may adopt the countersignature of the
original Warrant Agent and deliver such Warrants so countersigned.
                  In case at any time the name of the Warrant Agent shall be
changed and at such time any of the Warrants shall have been countersigned but
not delivered, the Warrant Agent may adopt the countersignature under its prior
name and deliver Warrants so countersigned. In all such cases such Warrants
shall have the full force provided in the Warrants and in the Agreement.
                  Section 15. Duties of Warrant Agent. The Warrant Agent
undertakes the duties and obligations imposed by this Agreement upon the
following terms and conditions, by all of which the Company and the holders of
Warrants, by their acceptance thereof, shall be bound:
                (a) The statements of fact and recitals contained
herein and in the Warrants shall be taken as statements of the Company, and the
Warrant Agent assumes no responsibility for the correctness of any of the same
except such as describe the Warrant Agent or action taken or to be taken by it.
The Warrant Agent assumes no responsibility with respect to the distribution of
the Warrants except as herein expressly provided.
                (b) The Warrant Agent shall not be responsible for any failure
of the Company to comply with any of the covenants in this Agreement or in the
Warrants to be complied with by the Company.

                                      -22-




                (c) The Warrant Agent may consult at any time with counsel
satisfactory to it (who may be counsel for the Company) and the Warrant Agent
shall incur no liability or responsibility to the Company or to any holder of
any Warrant in respect of any action taken, suffered or omitted by it hereunder
in good faith and in accordance with the opinion or the advice of such counsel.
                (d) The Warrant Agent shall incur no liability or
responsibility to the Company or to any holder of any Warrant for any action
taken in reliance on any notice, resolution, waiver, consent, order, certificate
or other instrument believed by it to be genuine and to have been signed, sent
or presented by the proper party or parties.
                (e) The Company agrees to pay to the Warrant Agent reasonable
compensation for all services rendered by the Warrant Agent in the execution of
this Agreement, to reimburse the Warrant Agent for all expenses, taxes and
governmental charges and other charges incurred by the Warrant Agent in the
execution of this Agreement and to indemnify the Warrant Agent and save it
harmless against any and all liabilities, including judgments, costs and
reasonable counsel fees, for anything done or omitted by the Warrant Agent in
the execution of this Agreement except as a result of the Warrant Agent's
negligence, willful misconduct or bad faith.

                                      -23-





                (f) The Warrant Agent shall be under no obligation to
institute any action, suit or legal proceeding or to take any other action
likely to involve expenses unless the Company or one or more registered holders
of Warrants shall furnish the Warrant Agent with reasonable security and
indemnity for any costs and expenses which may be incurred, but this provision
shall not affect the power of the Warrant Agent to take such action as the
Warrant Agent may consider proper, whether with or without any such security or
indemnity. All rights of action under this Agreement or under any of the
Warrants may be enforced by the Warrant Agent without the possession of any of
the Warrants or the production thereof at any trial or other proceeding, and any
such action, suit or proceeding instituted by the Warrant Agent shall be brought
in its name as Warrant Agent, and any recovery of judgment shall be for the
ratable benefit of the registered holders of the Warrants, as their respective
rights and interests may appear.
                (g) The Warrant Agent and any stockholder, director, officer,
partner or employee of the Warrant Agent may buy, sell or deal in any of the
Warrants or other securities of the Company or become pecuniarily interested in
any transaction in which the Company may be interested, or contract with or lend
money to or otherwise act as fully and freely as though it were not the Warrant

                                      -24-


Agent under this Agreement. Nothing herein shall preclude the Warrant Agent from
acting in any other capacity for the Company or for any other legal entity.
                (h) The Warrant Agent shall act hereunder solely as agent and 
its duties shall be determined solely by the provisions hereof.
                (i) The Warrant Agent may execute and exercise any of the rights
or powers hereby vested in it or perform any duty hereunder either itself or by
or through its attorneys, agents or employees, and the Warrant Agent shall not
be answerable or accountable for any such attorneys, agents or employees or for
any loss to the Company resulting from such neglect or misconduct, provided
reasonable care had been exercised in the selection and continued employment
thereof.
                (j) Any request, direction, election, order or demand of the
Company shall be sufficiently evidenced by an instrument signed in the name of
the Company by its Chief Executive Officer, President or a Vice President or its
Secretary or an Assistant Secretary or its Treasurer or an Assistant Treasurer
(unless other evidence in respect thereof be herein specifically prescribed);
and any resolution of the Board of Directors may be evidenced to the Warrant
Agent by a copy thereof certified by the Secretary or an Assistant Secretary of
the Company.

                  Section 16.  Change of Warrant Agent.  The Warrant
Agent may resign and be discharged from its duties under this Agreement by

                                      -25-






giving to the Company notice in writing, and to the holders of the Warrants
notice by mailing such notice to the holders at their addresses appearing on the
Warrant register, of such resignation, specifying a date when such resignation
shall take effect. The Warrant Agent may be removed by like notice to the
Warrant Agent from the Company and the like mailing of notice to the holders of
the Warrants. If the Warrant Agent shall resign or be removed or shall otherwise
become incapable of acting, the Company shall appoint a successor to the Warrant
Agent. If the Company shall fail to make such appointment within a period of
thirty (30) days after such removal or after it has been notified in writing of
such resignation or incapacity by the resigning or incapacitated Warrant Agent
or after the Company has received such notice from a registered holder of a
Warrant (who shall, with such notice, submit his Warrant for inspection by the
Company), then the registered holder of any Warrant may apply to any court of
competent jurisdiction for the appointment of a successor to the Warrant Agent.
Any successor Warrant Agent, whether appointed by the Company or by such a
court, shall be a bank or trust company, in good standing, incorporated under
New York or federal law. After appointment, the successor Warrant Agent shall be
vested with the same powers, rights, duties and responsibilities as if it had
been originally named as Warrant Agent without further act or deed and the
former Warrant Agent shall deliver and transfer to the successor Warrant Agent
all cancelled Warrants, records and property at the time held by it hereunder,
and execute and deliver any further assurance or conveyance necessary for the
purpose. Failure to file or mail any notice provided for in this Section,
however, or any defect therein, shall not affect the validity of the resignation
or removal of the Warrant Agent or the appointment of the successor Warrant
Agent, as the case may be.

                                      -26-



                  Section 17. Identity of Transfer Agent. Forthwith upon the
appointment of any transfer agent for the shares of Common Stock or of any
subsequent transfer agent for the shares of Common Stock or other shares of the
Company's Common Stock issuable upon the exercise of the rights of purchase
represented by the Warrants, the Company will file with the Warrant Agent a
statement setting forth the name and address of such transfer agent.
                  Section 18. Notices. Any notice pursuant to this Agreement to
be given by the Warrant Agent, or by the registered holder of any Warrant to the
Company, shall be sufficiently given if sent by first-class mail, postage
prepaid, addressed (until another is filed in writing by the Company with the
Warrant Agent) as follows:

                           HealthDesk Corporation 
                           2560 Ninth Street, Suite 220
                           Berkeley, California 94710 
                           Attention: Peter O'Donnell



                                      -27-





and a copy thereof to:

                           Gray Cary Ware & Freidenrich
                           400 Hamilton Avenue
                           Palo Alto, California 94301
                           Attention:  Peter Astiz

                  Any notice pursuant to this Agreement to be given by the
Company or by the registered holder of any Warrant to the Warrant Agent shall be
sufficiently given if sent by first-class mail, postage prepaid, addressed
(until another address is filed in writing by the Warrant Agent with the
Company) as follows:

                           American Stock Transfer and Trust Company
                           40 Wall Street
                           New York, New York 10005
                           Attention:  George Karfunkel

                  Any notice pursuant to this Agreement to be given by the
Warrant Agent or by the Company to the Underwriter shall be sufficiently given
if sent by first-class mail, postage prepaid, addressed (until another address
if filed in writing with the Warrant agent) as follows:

                           Whale Securities Co., L.P.
                           650 Fifth Avenue
                           New York, New York 10019
                           Attention: William G. Walters

and a copy thereof to:

                           Tenzer Greenblatt LLP
                           405 Lexington Avenue
                           New York, New York 10174
                           Attention: Robert J. Mittman, Esq.


                  Section 19. Supplements and Amendments. The Company and the
Warrant Agent may from time to time supplement or amend this Agreement in order
to cure any ambiguity or to correct or supplement any provision contained herein
which may be defective or inconsistent with any other provision herein, or to

                                      -28-


make any other provisions in regard to matters or questions arising hereunder
which the Company and the Warrant Agent may deem necessary or desirable and
which shall not be inconsistent with the provisions of the Warrants and which
shall not adversely affect the interest of the holders of Warrants.
                  Section 20. New York Contract. This Agreement and each Warrant
issued hereunder shall be deemed to be a contract made under the laws of the
State of New York and shall be construed in accordance with the laws of New York
applicable to agreements to be performed wholly within New York.
                  Section 21. Benefits of this Agreement. Nothing in this
Agreement shall be construed to give to any person or corporation other than the
Company, the Warrant Agent and the registered holders of the Warrants any legal
or equitable right, remedy or claim under this Agreement; but this Agreement
shall be for the sole and exclusive benefit of the Company, the Warrant Agent
and the registered holders of the Warrants.
                  Section 22. Successors. All the covenants and provisions of
this Agreement by or for the benefit of the Company, the Warrant Agent or the
Underwriter shall bind and inure to the benefit of their respective successors
and assigns hereunder.

                                      -29-




                  IN WITNESS WHEREOF, the parties have entered into this
Agreement on the date first above written.




                                       HEALTHDESK CORPORATION

                                       By:
                                          -------------------------------------



                                       AMERICAN STOCK TRANSFER
                                       AND TRUST COMPANY

                                       By:
                                          -------------------------------------



                                       WHALE SECURITIES CO., L.P.

                                       By: Whale Securities Corp.,
                                           General Partner


                                       By:
                                          -------------------------------------


                                      -30-