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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 I+234CNApPsHZE1r2YeJp5868QW2GNKP08OQzF1vz45h38DsO3a4yZnQBfbZ6Oj5
 jNaHp57u031YRdyt6nZVZg==

<SEC-DOCUMENT>0001179110-05-011052.txt : 20050611
<SEC-HEADER>0001179110-05-011052.hdr.sgml : 20050611
<ACCEPTANCE-DATETIME>20050526140412
ACCESSION NUMBER:		0001179110-05-011052
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050525
FILED AS OF DATE:		20050526
DATE AS OF CHANGE:		20050526

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MCF CORP
		CENTRAL INDEX KEY:			0000826683
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		IRS NUMBER:				112936371
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		600 CALIFORNIA STREET
		STREET 2:		NINTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94108
		BUSINESS PHONE:		(415) 248-5640

	MAIL ADDRESS:	
		STREET 1:		600 CALIFORNIA STREET
		STREET 2:		NINTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94108

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RATEXCHANGE CORP
		DATE OF NAME CHANGE:	20000512

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NETAMERICA COM CORP
		DATE OF NAME CHANGE:	19991116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NETAMERICA INTERNATIONAL INC
		DATE OF NAME CHANGE:	19981207

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MERRIMAN D JONATHAN
		CENTRAL INDEX KEY:			0001022711

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15831
		FILM NUMBER:		05859399

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		(415) 248-5601

	MAIL ADDRESS:	
		STREET 1:		MERRIMAN CURHAN FORD & CO
		STREET 2:		600 CALIFORNIA ST., 9TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94108
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4/A -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2005-05-25</periodOfReport>

    <dateOfOriginalSubmission>2005-05-25</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000826683</issuerCik>
        <issuerName>MCF CORP</issuerName>
        <issuerTradingSymbol>MEM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001022711</rptOwnerCik>
            <rptOwnerName>MERRIMAN D JONATHAN</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>600 CALIFORNIA STREET</rptOwnerStreet1>
            <rptOwnerStreet2>9TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94108</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-05-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2600</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.25</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2175250</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Amendment filed to correct aggregate total figure.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>D. Jonathan Merriman</signatureName>
        <signatureDate>2005-05-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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