OpenSea (NFT Marketplace Data + Seaport Trades)

OpenSea is the dominant NFT marketplace. This skill queries marketplace data — listings, offers, sales / events, floor prices, drops, traits — and executes Seaport trades via the official @opensea/cli. For NFT metadata (name, image, traits, ownership) outside the marketplace context, use Alchemy's NFT API instead. For pure cross-chain token swaps (no marketplace context), use the lifi ecosystem skill.


Primary tool	`npx @opensea/cli@latest <command>` (or `npm install -g @opensea/cli`)
REST API base	`https://api.opensea.io/api/v2`
Auth	`OPENSEA_API_KEY` header — instant via `POST /api/v2/auth/keys`, or signup at the developer portal
Optional Privy	`PRIVY_APP_ID` / `PRIVY_APP_SECRET` / `PRIVY_WALLET_ID` for write / fulfillment flows
Chains	Ethereum, Base, Arbitrum, Optimism, Polygon, and more

When to use this skill

Use opensea when any of the following are true: