Here is about the minimum request I used that worked for me:
<?xml version="1.0" encoding="utf-8"?>
<GetSellerListRequest xmlns="urn:ebay:apis:eBLBaseComponents">
<RequesterCredentials>
<eBayAuthToken>--Enter your AuthToken here--</eBayAuthToken>
</RequesterCredentials>
<ErrorLanguage>en_US</ErrorLanguage>
<WarningLevel>High</WarningLevel>
<StartTimeFrom>2013-06-01T21:59:59.005Z</StartTimeFrom>
<StartTimeTo>2013-09-26T21:59:59.005Z</StartTimeTo>
<EndTimeFrom>2013-09-26</EndTimeFrom>
<EndTimeTo>2013-11-26</EndTimeTo>
<GranularityLevel>Coarse</GranularityLevel>
<UserID>--Enter your seller's name here--</UserID>
<Pagination>
<EntriesPerPage>200</EntriesPerPage>
<PageNumber>1</PageNumber>
</Pagination>
<OutputSelector>ItemArray.Item.ItemID</OutputSelector>
<OutputSelector>ItemArray.Item.Quantity</OutputSelector>
<OutputSelector>ItemArray.Item.Title</OutputSelector>
<OutputSelector>ItemArray.Item.PrimaryCategory.CategoryID</OutputSelector>
<OutputSelector>ItemArray.Item.PrimaryCategory.CategoryName</OutputSelector>
</GetSellerListRequest>
I also had to add these headers to the request:
X-EBAY-API-APP-NAME -- Add yours here --
X-EBAY-API-CALL-NAME GetSellerList
X-EBAY-API-REQUEST-ENCODING XML
X-EBAY-API-SITEID 0
X-EBAY-API-DEV-NAME -- Add yours here --
X-EBAY-API-CERT-NAME -- Add yours here --
X-EBAY-API-COMPATIBILITY-LEVEL 825
I'm not sure which of the "-- Add yours here --" entries are public and which are private, so I'll aire on the side of caution and I'll let you get them for yourself.. :-)
With no eBayAuthToken entered, you get the following error:
<Errors>
<ShortMessage>Auth token is invalid.</ShortMessage>
<LongMessage>Validation of the authentication token in API request failed.</LongMessage>
<ErrorCode>931</ErrorCode>
<SeverityCode>Error</SeverityCode>
<ErrorClassification>RequestError</ErrorClassification>
</Errors>
I hope this helps.