QuickBooks Online

Start connecting your QuickBooks Online company: register your Intuit Developer app's Client ID/Client Secret, then get back a one-time browser authorize_url. Open it, sign in with Intuit, pick a company, and approve access -- QuickBooks redirects back here automatically and the connection finishes itself, no further action needed.

List the connected QuickBooks Online companies and whether each saved connection still works.

Disconnect a QuickBooks Online company: deletes the saved connection. Nothing in QuickBooks itself is changed.

List QuickBooks records of any entity type (Customer, Vendor, Employee, Item, Invoice, Bill, Payment, Estimate, SalesReceipt, CreditMemo, JournalEntry, Purchase, PurchaseOrder, VendorCredit, Deposit, Transfer, Account, Class, Department, TaxCode, Term, Attachable), with an optional WHERE filter fragment.

Read one QuickBooks record of any entity type in full by its Id (e.g. get one Invoice, Customer, Bill).

Create a new QuickBooks record of any entity type (e.g. a new Invoice, Customer, Bill, Item, Payment) from a JSON object of its fields exactly as QuickBooks expects.

Update selected fields of an existing QuickBooks record (sparse update, merged onto the existing entity). Requires the entity's current SyncToken from get_entity -- QuickBooks enforces optimistic concurrency.

Delete/void a QuickBooks record. Most QBO transaction entities (Invoice, Bill, Payment, ...) support delete=true instead of true deletion; a handful of master-data entities (Customer, Vendor, Item, Account) cannot be deleted at all by QuickBooks and are instead deactivated via update_entity (set Active=false).

Email a QuickBooks transaction (Invoice, Estimate, SalesReceipt, CreditMemo) to its customer, or to an override address.

Void a QuickBooks transaction (e.g. 'Invoice', 'SalesReceipt', 'Payment') -- keeps the record but zeroes its amount, for audit-trail-preserving corrections. Requires the entity's current SyncToken from get_entity.

Run a full QuickBooks SQL-like query against any entity, e.g. "SELECT * FROM Invoice WHERE Balance > '0' ORDERBY TxnDate DESC MAXRESULTS 50". The most flexible way to filter/sort/limit any QuickBooks data.

Run a QuickBooks report by name -- ProfitAndLoss, BalanceSheet, CashFlow, AgedReceivables, AgedPayables, GeneralLedger, TrialBalance, CustomerBalance, VendorBalance, TransactionList -- optionally scoped to a date range and/or grouped by Month/Quarter/Customer/Vendor.

Read the connected QuickBooks company's own profile: legal name, country, fiscal year start, address.

Attach a file to an existing QuickBooks transaction (e.g. a receipt PDF to a Bill, a signed contract to an Invoice) by fetching it from a publicly reachable URL and uploading it server-side.

Value-add report: one-glance cash position for the connected company -- bank account balances, total cash, and unpaid/overdue invoice and bill totals, so you see the real financial picture in one call.

Value-add report: flag every unpaid invoice overdue by at least a given number of days, sorted worst-first -- the AR collections list.