JUMP TOAbound APIIntroductionPostman CollectionAccess TokensCreate an access tokenpostDocumentsCreate documentspostList all documentsgetRetrieve a documentgetDelete a documentdeleteExpensesCreate expensespostList all expensesgetRetrieve an expensegetUpdate an expenseputDelete an expensedeleteIncomesCreate incomespostList all incomesgetRetrieve an incomegetUpdate an incomeputDelete an incomedeleteMailingsCreate a mailingpostList all mailingsgetRetrieve a mailinggetDelete a mailingdeleteMileageCreate mileagespostList all mileagesgetRetrieve mileagegetUpdate a mileageputDelete a mileagedeletePayersCreate payerspostList all payersgetRetrieve a payergetUpdate a payerputDelete a payerdeletePayment MethodsCreate a payment methodpostList all payment methodsgetRetrieve a payment methodgetTax CategoriesRetrieve tax categories by tax yeargetTax PaymentsCreate a tax paymentpostList all tax paymentsgetRetrieve a tax paymentgetTaxesList all taxesgetRetrieve taxes by tax yeargetCalculate taxesputUsersCreate a userpostList all usersgetRetrieve a usergetUpdate a userputRetrieve a mailingget https://sandbox-api.withabound.com/v2/users/{userId}/documents/{documentId}/mailings/{mailingId}Retrieves the details of an existing mailing.