On 28 August 2026, Amazon removes the Finances v0 API. If your reporting, accounting sync, or reconciliation still calls /finances/v0/..., it stops returning data the day it goes dark — and payouts stop tying out.
I run five Amazon Selling Partner API integrations in production, and Amazon's own developer team publicly validated a reconciliation method of mine in their official GitHub repo (issue #5353). Here's the migration, minus the fluff — plus the parts that quietly break.
The move: v0 → listTransactions
The replacement is listTransactions (Finances 2024-06-19). It gives you an earlier, itemized view of financial events without waiting for the settlement report. The field mapping is mostly mechanical — but three things trip almost everyone up.
The 3 reconciliation gaps
1. Fees with no order id. Not every financial line has an AmazonOrderId. Service fees, subscription charges and some adjustments reference only a FinancialEventGroupId (the payout group). If you reconcile purely at the order level, those lines silently vanish and your totals won't match the payout.
2. Group-level vs order-level. Reconcile at the payout/group total first, then drill into line items. Don't expect the transactions and the settlement flat-file to be 1:1 at the row level.
3. Settlement matching. Match settlement-id to the financial event group at the payout level. The relatedIdentifierName on each transaction (ORDER_ID or FINANCIAL_EVENT_GROUP_ID) is how you cross-reference — miss the group-only case and reconciliation drifts by a few cents you'll never find manually.
What to do this week (checklist)
- Grep your codebase for every
finances/v0call — know your exposure. - Map each v0 field to its
listTransactionsequivalent. - Handle the fee-with-no-order-id case explicitly.
- Add a reconciliation check: transactions grouped by payout must tie to the settlement total.
- Add retries + a log that surfaces every divergence (no silent syncs).
- Test against a real payout before 28 Aug — not a demo.
Free tools
-
30-second scanner — paste your integration; it flags every v0 call that breaks and shows the
listTransactionsreplacement. Runs in your browser, nothing uploaded. - Free field guide — the full v0 → listTransactions field map plus these edge cases.
Both, the migration kit, and the done-for-you option are here: https://proficientstack.com/sp-api.html
If the deadline is on your radar but not yet on anyone's desk, that page has the browser-side scanner — and if you'd rather just have it migrated and reconciled cleanly before the 28th, in writing, no calls, that's exactly what I do.
13 days. Better to find the gaps now than on the 29th.
