August 13, 2026: Auctions Instant Purchase APIs are available for Closeout domains

We've added Instant Purchase endpoints so you can buy eligible Closeout / Buy Now auction domains programmatically — list eligible payment profiles, preview all-in pricing, then purchase — so you can automate fixed-price Closeout acquisition without the Auctions UI.

What changed

• GET /v1/customers/{customerId}/paymentProfiles — list ACTIVE payment profiles eligible for Instant Purchase.
• POST /v1/customers/{customerId}/auctions/purchases/preview — preview all-in pricing for up to 10 Closeout domains (totalPrice in USD micro-units).
• POST /v1/customers/{customerId}/auctions/purchases — purchase one or more eligible Closeout domains using a paymentProfileId (optional; defaults to the most recently used supported method).

You can use the MY alias for {customerId}. Authenticate with a legacy API key (sso-key). Partial success returns 207 Multi-Status with per-domain status and failureReason.

Who is affected

Available to developers with Auctions Instant Purchase access and a configured payment profile. Existing Domains and Aftermarket partner integrations are unchanged; these endpoints are additive. Instant Purchase does not place bids on open Expired Auctions — use the bidding endpoint for that.

Links

• Instant Purchase reference — endpoint schemas
• Buy through instant purchase — preview and purchase workflow
• About the Auctions API — bidding vs Instant Purchase
• Product announcement — launch context

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