The new Sei Testnet (atlantic-2) is now live on OpenSea testnets and the old devnet (arctic-1) has been deprecated.

Today we introduced a new API endpoint for cancelling orders offchain that use the SignedZone: https://docs.opensea.io/reference/cancel_order

The Polygon Amoy testnet is now live on OpenSea. Amoy replaces Mumbai as the Polygon Proof-of-Stake testnet chain based on Sepolia. Mumbai was based on Goerli, which is deprecated.

Starting today, OpenSea is migrating to Seaport v1.6. There are no interface changes to Seaport, so the methods and events are the same. As a developer, you just need to update to the latest SDK versions to create and submit orders using Seaport v1.6:

• New SDK Releases: <https://github.com/ProjectOpenSea/opensea-js/releases>
  • v7.0.5: replaces Optimism Goerli (deprecated) with Optimism Sepolia
  • v7.0.4: replaces Base Goerli (deprecated) with Base Sepolia
  • v7.0.3: fixes bug in returning errors from API responses
• Events (Analytics) API
  • Get Events (by account) pagination fixed
  • Get Events endpoints limit parameter fixed
• NFT API
  • Get Collection returns two new fields:total_supply (minted minus burned) and created_date
  • Get Contract response field supply renamed to total_supply, added note to the description of the field that this value only returns the value provided from the contract if the contract has a getter for totalSupply()
  • Get Account and Get Collection fixed returning twitter and instagram usernames

• New Major Version SDK Release (v7.0.0): <https://github.com/ProjectOpenSea/opensea-js/releases/tag/v7.0.0>
• Rate Limits: doubled default rate limits for /v2
• Events (Analytics) API
  • all events now have an event_timestamp (posix timestamp at which the event occured on the blockchain)
  • transfer events now have an nft field
  • cancel events now have the following fields: nft, order_type, and maker
    • note: API now returns both canceled listings and canceled offers when querying for event_type=cancel
  • event payment quantity now returns as a string instead of a number (for compatibility with JavaScript)
  • general purpose Get Events endpoint added
• NFT API
  • added an endpoint for getting payment tokens (has both USD and ETH price for the token)
  • added opensea_url to the NFT model
  • added valid payment_tokens to the collection response
• Marketplace API
  • added price object to offers

Today, we are launching two new endpoints: one endpoint to get the highest bid for an NFT and one endpoint to get the cheapest listing for an NFT.

Over the past 3 months, OpenSea has been closing the feature disparity between the V1 and V2 API. The V2 API is superior to V1 in many ways including:

Previously, OpenSea had been returning the OpenSea CDN url in NFT responses. One example is the List NFT endpoints which returned the NFT Model which included image_url. Going forward, the image_url field returned when listing NFTs, is deprecated.

There is a new guide created to help developers have clear instructions on what fees are required and how to set them when creating an order via the OpenSea API.