If you are integrating with XERO, then the Xero API previewer is a fantastic tool to quickly check query formats, data formats and data values as well. It returns real data from the account you logged in as and you can even copy and paste the results handraulically into another system for processing. The only issue is that it is quite hard to read.
Where the contents show:
f483dea8-6a1f-426b-be3c-17b4a38a8653 OK Xero API Previewer 2013-08-27T08:33:43.3599219Z 4b3c8980-cc25-45a5-8821-91af40ef1ab1 TestTo 2013-06-30T00:00:00 AUTHORISED Inclusive 31000.00 0.00 31000.00 2013-06-30T03:05:13.253 USD 1a848561-0fef-4872-88c1-0c9998e6720a edb716d5-001b-4a10-92a1-cbaaca4e0970 Test1 SPEND TestRef false false cb3e4439-fbf0-4a5b-84e3-3b3dfb531f28 SpendTo 2013-06-30T00:00:00 AUTHORISED Inclusive 40000.00 0.00 40000.00 2013-06-30T03:09:27.897 USD 6961882c-141a-4caa-bf47-6db51b718fd7 edb716d5-001b-4a10-92a1-cbaaca4e0970 Test1 SPEND SpendRef false false 7b4acc9b-4fe3-4cce-9ef6-713838d0250e Test3 2013-06-30T00:00:00 AUTHORISED Inclusive 130235.00 0.00 130235.00 2013-06-30T06:28:19.537 USD d54bf964-5366-4118-ab97-4b1b82a7b183 a4865cca-73f0-4da6-8bb4-e9e2a5fd7fda AccountNameCC SPEND CCSpentRef false false 067dd16c-d080-499c-b82b-843b71ae8e24 AccountCCTo1 2013-07-01T00:00:00 AUTHORISED Inclusive 101.00 0.00 101.00 2013-07-01T02:31:35.127 USD 278b63c3-e656-4624-bf3b-154b97619afe 4aee2adf-f64b-4299-9561-5cf899536325 AccountCreditcard1 SPEND AccountCCTo1Ref false false cca1d8f6-4d0d-4a3d-aaa2-634254c80a9d John 2013-08-15T00:00:00 AUTHORISED Inclusive 40000.00 0.00 40000.00 2013-08-14T22:08:23.427 USD d039fe9f-a2d7-4f9a-9ada-257a63a12557 a4865cca-73f0-4da6-8bb4-e9e2a5fd7fda AccountNameCC RECEIVE false false 4b3c8980-cc25-45a5-8821-91af40ef1ab1 TestTo 2013-08-04T00:00:00 AUTHORISED NoTax 10800.00 0.00 10800.00 2013-08-15T05:46:00.557 USD 6ffb0bb1-f842-4b93-bae8-6c15af7681b6 0139cefc-944b-4d16-8070-fc45d4a0f774 Saving Account SPEND-OVERPAYMENT false false 80c98f3f-27fa-4cee-907b-07a1a748247e Test/Test1 2013-08-15T00:00:00 AUTHORISED Inclusive 30000.00 0.00 30000.00 2013-08-18T03:05:06.42 USD a37dc5ae-c0b1-484c-b248-8b641fb37483 edb716d5-001b-4a10-92a1-cbaaca4e0970 Test1 RECEIVE false false 2013-06-30T00:00:00 DELETED NoTax 12.00 2013-08-18T03:05:48.743 USD 4d6ccd40-8772-4518-b221-08e2125abd51 edb716d5-001b-4a10-92a1-cbaaca4e0970 Test1 SPEND-TRANSFER false false 2013-06-30T00:00:00 DELETED NoTax 12.00 2013-08-18T03:05:48.743 USD 65b712a4-1092-4bc5-8f43-aa16d27efc99 0139cefc-944b-4d16-8070-fc45d4a0f774 Saving Account RECEIVE-TRANSFER false false fac19df4-e92b-45d1-9565-115933a65481 Paul 2013-08-18T00:00:00 AUTHORISED Inclusive 22000000.00 0.00 22000000.00 2013-08-18T03:07:53.343 USD ebbd4239-385e-48e7-b40e-c930a263b33e 0139cefc-944b-4d16-8070-fc45d4a0f774 Saving Account RECEIVE false false 9b8d7fd5-9e81-4dcd-949b-c5236128d147 My Test 2013-08-17T00:00:00 AUTHORISED Inclusive 20000000.00 0.00 20000000.00 2013-08-18T03:12:32.013 USD 9484a732-2ae7-44a8-af86-4e111710cdac 0139cefc-944b-4d16-8070-fc45d4a0f774 Saving Account RECEIVE false false
The trick is to copy this into notepad and save it as an XML file. Then use excel to import this XML file.