7 Ways a Google Merchant API Migration Can Fail Even When the Code Compiles
Disclosure: AI-assisted research and editing helped prepare this article. I operate MicroStudio Evidence, which offers the paid source-code dependency review described near the end. The technical claims were checked against the linked Google documentation. All evidence examples are synthetic; no customer engagement or production migration is represented.
Google says the Content API for Shopping will shut down on August 18, 2026. For a custom integration, the dangerous assumption is that the migration is mostly a client-library or hostname change.
It is not. The change affects method contracts, resource identity, data-source ownership, money representation, batching, quota behavior, and the distinction between an accepted input and a processed product. A team can produce code that compiles against Merchant API and still lose writes, miss products, or report false success after cutover.
The fastest way to make the work reviewable is to start with a source-code dependency inventory. Every observed Content API call...
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