A clean, isolated read of FC Transfer units straight from SP-API getInventorySummaries (Real Essentials profile) — the field Amazon kept in the API after dropping reserved_fc-transfers from the Reserved Inventory Report on 2026-06-16. One row per ASIN — alias SKUs collapsed, FNSKU pools summed (no double-count, no undercount). Nothing here touches the existing reserved pipeline.
On-demand — Amazon's getInventorySummaries is live, so pull whenever you want a current read (~5–8 min for the full catalog).
Pulling inventory summaries from Amazon…
This takes a few minutes (~10.5k SKUs, rate-limited by Amazon).