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EX-31 Rule 13a-14(d)/15d-14(d) Certification.

I, Helaine M. Kaplan, certify that:

1.  I have reviewed this report on Form 10-K and all reports on
    Form 10-D required to be filed in respect of the period covered by
    this report on Form 10-K of the COMM 2013-CCRE8 Mortgage Trust (the
    "Exchange Act periodic reports");

2.  Based on my knowledge, the Exchange Act periodic reports, taken as a
    whole, do not contain any untrue statement of a material fact or omit
    to state a material fact necessary to make the statements made, in
    light of the circumstances under which such statements were made, not
    misleading with respect to the period covered by this report;

3.  Based on my knowledge, all of the distribution, servicing and other
    information required to be provided under Form 10-D for the period
    covered by this report is included in the Exchange Act periodic
    reports;

4.  Based on my knowledge and the servicer compliance statements required
    in this report under Item 1123 of Regulation AB, and except as
    disclosed in the Exchange Act periodic reports, the servicers have
    fulfilled their obligations under the servicing agreements in all
    material respects; and

5.  All of the reports on assessment of compliance with servicing
    criteria for asset-backed securities and their related attestation
    reports on assessment of compliance with servicing criteria for
    asset-backed securities required to be included in this report in
    accordance with Item 1122 of Regulation AB and Exchange Act Rules
    13a-18 and 15d-18 have been included as an exhibit to this report,
    except as otherwise disclosed in this report. Any material instances
    of noncompliance described in such reports have been disclosed in
    this report on Form 10-K.

In giving the certifications above, I have reasonably relied on
Information provided to me by the following unaffiliated parties:

Midland Loan Services, a Division of PNC Bank, National Association, as
Master Servicer, Midland Loan Services, a Division of PNC Bank, National
Association, as Special Servicer, U.S. Bank National Association, As
Trustee, Park Bridge Lender Services LLC, as Operating Advisor, Wells
Fargo Bank, National Association, as Master Servicer for the 375 Park
Avenue Mortgage Loan, Wells Fargo Bank, National Association, as Special
Servicer for the 375 Park Avenue Mortgage Loan, U.S. Bank National
Association, as Trustee for the 375 Park Avenue Mortgage Loan, Citibank,
N.A., as Certificate Administrator for the 375 Park Avenue Mortgage Loan,
CoreLogic Commercial Real Estate Services, Inc., as Servicing Function
Participant for the 375 Park Avenue Mortgage Loan, National Tax Search,
LLC, as Servicing Function Participant for the 375 Park Avenue Mortgage
Loan, U.S. Bank National Association, as Servicing Function
Participant for the 375 Park Avenue Mortgage Loan, Midland Loan Services,
a Division of PNC Bank, National Association, as Master Servicer for the
Moffett Towers Phase II Mortgage Loan, Situs Holdings, LLC, as Special
Servicer for the Moffett Towers Phase II Mortgage Loan, Wells Fargo Bank,
National Association, as Trustee and Certificate Administrator for the
Moffett Towers Phase II Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Moffett Towers Phase II Mortgage Loan,
Park Bridge Lender Services LLC, as Operating Advisor for the Moffett
Towers Phase II Mortgage Loan, KeyBank National Association (as successor
to KeyCorp Real Estate Capital Markets, Inc.), as Primary Servicer for
the Paramount Building Mortgage Loan, Midland Loan Services, a Division
of PNC Bank, National Association, as Special Servicer for the Paramount
Building Mortgage Loan, U.S. Bank National Association, as Trustee for
the Paramount Building Mortgage Loan, and Park Bridge Lender Services
LLC, as Operating Advisor for the Paramount Building Mortgage Loan.


    Dated:   May 21, 2014


    /s/ Helaine M. Kaplan
    Helaine M. Kaplan
    President
    (senior officer in charge of securitization of the depositor)