PayPal API using SOAP - api

Question

I need to use the PayPal API, using SOAP, to get our PayPal balance.
I've got as far as making a request using this XML:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" >
<SOAP-ENV:Header>
<RequesterCredentials xmlns="urn:ebay:api:PayPalAPI" xsi:type="ebl:CustomSecurityHeaderType">
<Credentials xmlns="urn:ebay:apis:eBLBaseComponents" xsi:type="ebl:UserIdPasswordType">
<Username>[xxxxx]</Username>
<Password>[xxxxx]</Password>
<Signature>[xxxxx]</Signature>
<Subject>
</Subject>
</Credentials>
</RequesterCredentials>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<GetBalanceReq xsi:type="GetBalanceRequest">
<GetBalanceRequest xsi:type="GetBalanceRequestType">
<Version>83.0</Version>
<ReturnAllCurrencies>0</ReturnAllCurrencies>
</GetBalanceRequest>
</GetBalanceReq>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
...but I'm getting this response:
SOAP-ENV:ClientMethod 'GetBalanceReq' not implemented
Does my XML look ok..?

Answer 1

You can omit the optional parts in the "Credentials" header. Maybe you did not select the right endpoint (it seems getBalance is not available). The following SOAP request works with the latest sandbox WSDL :
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:ebay:api:PayPalAPI" xmlns:urn1="urn:ebay:apis:eBLBaseComponents">
<soapenv:Header>
<urn:RequesterCredentials>
<urn1:Credentials>
<urn1:Username>xxxx</urn1:Username>
<urn1:Password>xxxx</urn1:Password>
<urn1:Signature>xxxx</urn1:Signature>
</urn1:Credentials>
</urn:RequesterCredentials>
</soapenv:Header>
<soapenv:Body>
<urn:GetBalanceReq>
<urn:GetBalanceRequest>
<urn1:Version>83.0</urn1:Version>
<urn:ReturnAllCurrencies>0</urn:ReturnAllCurrencies>
</urn:GetBalanceRequest>
</urn:GetBalanceReq>
</soapenv:Body>
</soapenv:Envelope>
And the response:
<SOAP-ENV:Envelope "...">
<SOAP-ENV:Header>
"..."
</SOAP-ENV:Header>
<SOAP-ENV:Body id="_0">
<GetBalanceResponse xmlns="urn:ebay:api:PayPalAPI">
<Timestamp xmlns="urn:ebay:apis:eBLBaseComponents">2011-10-20T17:27:54Z</Timestamp>
<Ack xmlns="urn:ebay:apis:eBLBaseComponents">Success</Ack>
<CorrelationID xmlns="urn:ebay:apis:eBLBaseComponents">e6bb1ac6861d7</CorrelationID>
<Version xmlns="urn:ebay:apis:eBLBaseComponents">83.0</Version>
<Build xmlns="urn:ebay:apis:eBLBaseComponents">2183220</Build>
<Balance xsi:type="cc:BasicAmountType" currencyID="USD">0.00</Balance>
<BalanceTimeStamp xsi:type="xs:dateTime">2011-10-20T17:27:54Z</BalanceTimeStamp>
</GetBalanceResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>