The API sends and receives enums as integers. The OpenAPI document lists the permitted values but not their names, so this page is the authoritative mapping.

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SearchingContextType

Selects the perspective for any search endpoint.

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MarketplaceListingStatus

The lifecycle of a marketplace listing.
The values are not contiguous — 3, 4, 8 and 9 are unused. Don’t infer order from the numbers.

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MarketplaceListingRequestStatus

The lifecycle of a cash offer. The API calls cash offers “marketplace listing requests” internally; both names refer to the same object.

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ShippingRequestMethod

How a cash offer wants the item shipped. For Cheapest and ASAP, maxShippingPrice must be null or 0.

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MarketplaceListingCancellationReason

Why a listing was cancelled. Returned on cancelled listings.

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ReturnStatus

The lifecycle of a return. Reaches v1 through activeReturn on a marketplace listing search result.
4 is unused. And activeReturn only ever carries an active status — Requested, Approved, Shipped or NotReceived. Once a return reaches NotApproved, Completed or ClosedBuyerKeptItem the field goes null rather than reporting the outcome, so activeReturn answers “is a return open on this listing?” and not “what happened to the return?”

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ColumnFilterOperator

The comparison in a columnFilters entry.
This enum is documented because the generated reference renders it, not because v1 uses it. columnFilters reaches v1 only inside the echoed writePagedSearch block of a search response — the v1 search request bodies do not accept it, and nothing applies it. See Searching.

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DeliveryStatus

Carrier tracking state for a shipped listing.

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StorageConditionType

Storage requirement for a drug package.
Treat these as open sets. New values can be added, so handle an unrecognised integer gracefully rather than throwing.