Tooling
Payload validator
The exact schema BrandsGateway enforces, plus the business rules the schema cannot express. Your payload is checked by this portal and discarded — it is never stored, and nothing here is sent on to the marketplace.
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Put this in your pipeline, not just your browser
The same checks are available at
POST /api/v1/validate, with no authentication and no rate
limit. Running it in CI is how you stop a feed change from rejecting
thousands of products at 3am — see
validating in CI.