An attempt to define the different attributes returned

• id (int) internal mint.com transaction ID - primary key
• fi (string) - financial institution name
• account (string) - account name
• odate (text-based date format, see note) - original date
• date (text-based date format, see note) - assume this is the edited/corrected date (if edited)
• note (string / blob) - user supplied description/notes
• amount (currency)
• omerchant (string) - original merchant description
• mmerchant (string) - "modified" merchant description? not sure.
• merchant (string) - final merchant description - what is displayed in the UI
• category (string) - user chosen category
• mcategory (string) - "modified" category?
• labels (array) - labels as (string) name and (int) id
• isDebit (bool) - whether or not the transaction was an expense (true) or income (false)
• isEdited (bool) - assuming this flags if the transaction has been altered from the user
• isPending (bool)
• isPercent (bool)
• isMatched (bool)
• isFirstDate (bool)
• isDuplicate (bool)
• hasAttachments
• isChild (bool)
• isSpending (bool)
• isTransfer (bool)
• isAfterFiCreationTime (bool)
• manualType (int)
• txnType (int)
• isCheck (bool)
• ruleMerchant
• ruleCategory
• ruleCategoryId (int)
• numberMatchedByRule
• categoryId (int)
• userCategoryId
• isLinkedToRule (bool)

Note on the "text-based date format" - for anything within the last month or so, it says "Jan 15" for January 15th. Once it gets older, it will show MM/DD/YY. PHP can fix it easily with date('Y-m-d', strtotime(string))