Amazon Dropping FNSKU From Data Kiosk Economics Dataset — Developers Must Migrate by December 17
Amazon will remove the FNSKU enum from the Data Kiosk Economics dataset on 17 December 2025. After that date any request using productIdentifier=FNSKU returns a 400 error. Sellers must switch to ASIN or SKU identifiers before the deadline.
Overview
Amazon will eliminate the FNSKU option from the product identifier list in the Data Kiosk Economics dataset on December 17, 2025. The removal applies to every Amazon marketplace and will cause any existing query that references FNSKU to return an error. Sellers and developers must transition to ASIN‑ or SKU‑based identifiers before that date to keep their economics reports functional.
Key Points
- Removal date — The FNSKU enum entry disappears from the dataset on 17 December 2025.
- Global scope — No marketplace is exempt; the change rolls out across all regions.
- Query failure — After the cutoff, any request that includes FNSKU will generate an error response instead of data.
- ASIN and SKU remain — Both identifiers continue to be supported, offering product‑level and seller‑level granularity respectively.
- Impact on automation — Scripts, dashboards, and third‑party tools that rely on FNSKU will stop working unless they are updated.
What's Changing
- Deletion of the FNSKU enum value — The product identifier list in the Analytics Economics dataset will no longer contain the FNSKU option. For example, a query that previously used
productIdentifier=FNSKUwill be rejected with a validation error after 17 Dec 2025. - Uninterrupted support for ASIN — ASIN‑level granularity stays intact, delivering economics metrics (revenue, fees, profit) tied to each catalog listing. A seller who switches a query to
productIdentifier=ASINwill continue to receive per‑listing data without interruption. - Continued SKU functionality — SKU‑level granularity also persists, allowing sellers to pull economics data keyed to their internal SKU codes. An inventory‑management system that changes its request to
productIdentifier=SKUwill still receive fulfillment‑specific metrics. - Error handling for legacy calls — Any API call that still references FNSKU after the deadline will return a 400‑type error, halting data retrieval pipelines. A scheduled report that runs nightly and includes FNSKU will fail and trigger alerts in monitoring tools.
Analysis & Recommendations
Why This Matters
Automated reports, dashboards, and third‑party tools that pull economics data will stop working after 17 Dec 2025, generating 400‑type errors. Migrating to ASIN or SKU preserves access to revenue, fee, and profit metrics and avoids service disruption.
Key Takeaways
- FNSKU enum is removed from the product identifier list on 17 Dec 2025 across all Amazon marketplaces.
- Queries using productIdentifier=FNSKU will receive a 400 validation error after the cutoff.
- ASIN and SKU identifiers remain fully supported for economics data.
- No grace period is provided; the change is hard‑coded on the specified date.
Recommended Actions
- →Search your code repository and scheduled reports for the string 'productIdentifier=FNSKU' and replace it with 'productIdentifier=ASIN' or 'product...
- →Run end‑to‑end tests in the SP‑API sandbox to verify that economics responses for the new identifiers return correct fee and revenue fields.
- →Update internal runbooks, SOPs, and any documentation in your wiki to remove references to FNSKU and note the migration deadline of 17 Dec 2025.
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