You should create a normal menu inside your WCF module and insert a DBEdit with all columns you want to be accessed when consuming you webservice. If you want to filter by warehouse, you should include a column with this information.
This example is for suppliers but works in same way:
Columns available in web method:
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|Asked: 4/16/19, 9:21 AM|
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|Last updated: 9/26/19, 5:03 PM|