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  • Important: Due to EU & UK Payments regulatory requirements, an additional security verification via Digital Signatures is required for certain API calls that are made by EU/UK sellers. Please refer to Digital Signatures for APIs to learn more on the impacted APIs and the process to create signature to be included in the HTTP payload.

  • OpenAPI Specification - Version 2.0 for all of our RESTful APIs will no longer be available starting April 5, 2023. We will continue leveraging OpenAPI Specification - Version 3.0 for new features in our RESTful APIs.

Note: This is a Limited Release(Limited Release) API available only to select developers approved by business units. For information on how to obtain access to this API in production, see the Buy APIs Requirements.

The Buy Offer API enables Partners to place proxy bids for a buyer and retrieve the auctions where the buyer is bidding. By placing a proxy bid, the buyer is agreeing to purchase the item if they win the auction.


Method NameHTTP MethodPathSummarySamples
getBiddingGET/bidding/{item_id}Retrieves bidding details on an auction item for which the user is an active bidder.View getBidding - /bidding/{item_id}
placeProxyBidPOST/bidding/{item_id}/place_proxy_bidEnables automatic bidding for a user on an auction item up to a maximum amount that the user is willing to bid.View placeProxyBid - /bidding/{item_id}/place_proxy_bid