Finances API v2024 migration: migration guide and scanner checklist

Official status

Amazon documentation lists Finances API v0 financial-event operations as in-scope for this migration. Use the official source before code freeze because deadlines and replacement details can change.

Amazon Finances API v2024-06-19 reference Amazon SP-API deprecation schedule

Production Finances validation plan

Finances migration must protect accounting completeness. The validator evidence should be paired with a manifest that proves windows, nextToken pagination, recursive breakdowns and expected totals for representative close periods.

Finances reconciliation proof pack

Finances migration should be signed off with a manifest, not screenshots. The manifest records every request window, page, nextToken, transaction ID and expected total so reviewers can reproduce the reconciliation.

• Split every close-period request into compliant windows and keep original arguments on nextToken pages.
• Preserve empty pages when nextToken exists so pagination tests do not stop early.
• Reconcile recursive transaction breakdowns with deterministic decimals.
• Compare duplicate transaction IDs and related identifiers before publishing ledger totals.

Removed resource and replacement

What breaks

Before/after example

The example is intentionally small so the migration shape is visible in a code review.

Before:
const events = await client.listFinancialEvents({ PostedAfter });

After:
const txns = await client.listTransactions({ postedAfter, postedBefore });

Scanner detection

Migration checklist

• Replace the v0 financial-event call with listTransactions and preserve request arguments on token pages.
• Split postedAfter..postedBefore ranges into 180-day-or-smaller UTC windows.
• Validate a request manifest and page samples in the Finances Reconciliation Validator.
• Compare recursive breakdown totals and duplicate transaction IDs before using the output for accounting.

Common mistakes

• Stopping on an empty transactions array while nextToken still exists.
• Sending a token-only follow-up request without original listTransactions arguments.
• Flattening recursive breakdown totals with floats instead of deterministic decimals.