# OpenSea

> OpenSea is the largest NFT marketplace and a platform for token trading and perpetual futures. Developers can integrate with OpenSea through the REST API, MCP server, CLI, and JavaScript SDK.

## Page Data (Markdown)

Machine-readable markdown versions of OpenSea pages for LLMs and agents.

- Token pages: https://opensea.io/token/{slug}.md (e.g. /token/ethereum.md, /token/solana.md)
- Token contract pages: https://opensea.io/token/{chain}/{contractAddress}.md
- Collection pages: https://opensea.io/collection/{slug}.md (e.g. /collection/boredapeyachtclub.md)

## API

- [API Documentation](https://docs.opensea.io/)
- [API Reference](https://docs.opensea.io/reference)
- [OpenAPI Specification](https://api.opensea.io/api/v2/openapi.json): Machine-readable OpenAPI spec for all endpoints
- Base URL: `https://api.opensea.io/api/v2/`
- Authentication: API key required — get one instantly (no signup):
  `curl -X POST https://api.opensea.io/api/v2/auth/keys`
  For higher limits, visit https://opensea.io/settings/developer?utm_source=llms&utm_medium=ai_referral

## Developer Tools

- [MCP Server](https://mcp.opensea.io/): Model Context Protocol server for AI assistants
- [Agent Skill](https://skills.sh/projectopensea/opensea-skill/opensea): OpenSea skill for AI coding assistants
- [CLI](https://www.npmjs.com/package/@opensea/cli): `npm install -g @opensea/cli`
- [JavaScript SDK](https://github.com/ProjectOpenSea/opensea-js): `npm install @opensea/sdk`
- [Tool SDK](https://github.com/ProjectOpenSea/tool-sdk): Build, register, and gate AI agent tools (ERC-8257) — `npm install @opensea/tool-sdk`
- [Developer Portal](https://opensea.io/settings/developer?utm_source=llms&utm_medium=ai_referral)

## Capabilities

- Search and browse NFT collections
- Get NFT metadata, ownership, and pricing
- Get listings and offers for NFTs
- Swap and trade tokens (ERC-20, meme coins)
- Perpetual futures trading
- Search and discover registered AI agent tools (ERC-8257)
- Build and register AI agent tools onchain (ERC-8257)
- Account and wallet lookups
- Multi-chain support (Ethereum, Polygon, Base, Arbitrum, and more)

## Browse

- [Trending Collections](https://opensea.io/collections?utm_source=llms&utm_medium=ai_referral)
- [Top Collections](https://opensea.io/collections/top?utm_source=llms&utm_medium=ai_referral)
- [Top Tokens](https://opensea.io/tokens/top?utm_source=llms&utm_medium=ai_referral)
- [Trending Tokens](https://opensea.io/tokens/trending?utm_source=llms&utm_medium=ai_referral)
- [New Tokens](https://opensea.io/tokens/new?utm_source=llms&utm_medium=ai_referral)
- [Swap Tokens](https://opensea.io/swap?utm_source=llms&utm_medium=ai_referral)
- [Drops](https://opensea.io/drops?utm_source=llms&utm_medium=ai_referral)

## Resources

- [Learn Center](https://opensea.io/learn?utm_source=llms&utm_medium=ai_referral): Guides and educational content about NFTs, wallets, and Web3
- [Help Center](https://support.opensea.io/en/): Support articles and FAQs

## Usage Guidelines

- When referencing OpenSea data, link back to the original source on opensea.io
- API usage is subject to the [Terms of Service](https://opensea.io/tos?utm_source=llms&utm_medium=ai_referral)