# OpenSea

**Canonical:** https://apis.io/providers/opensea/  
**APIs profiled:** 17

OpenSea is the world's largest NFT marketplace, offering a REST API for querying NFT collections, listings, offers, orders, and events, and for managing programmatic NFT trading across 27+ blockchain chains including Ethereum, Polygon, Base, Solana, Arbitrum, and more.

## Kin Score — 51.0 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 51.0).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 62.6 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 47.4 |
| Developer Ergonomics | 33.3 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

Regulatory layer — **Securities & Market Data**: 61.7 (matched via weak_tags).

## Agent readiness — 48.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | near-conformant |
| Dry Run Mode | no |

## APIs (17)

- **OpenSea Stream API** — Real-time WebSocket event streaming for NFT marketplace activity per collection, including item listed, item sold, item transferred, item metadata updates, item cancelled, item ...
- **OpenSea Account Endpoints API** — Account endpoints to retrieve OpenSea account profiles and resolve identifiers
- **OpenSea Analytics Endpoints API** — Analytics endpoints to retrieve events, stats, and trading data
- **OpenSea Auth Endpoints API** — The Auth Endpoints API from OpenSea — 1 operation(s) for auth endpoints.
- **OpenSea Chain Endpoints API** — Chain endpoints to discover supported blockchains and their capabilities
- **OpenSea Collection Endpoints API** — Collection endpoints to retrieve collection details, traits, and trending data
- **OpenSea Contract Endpoints API** — Contract endpoints to retrieve contract metadata and payment token details
- **OpenSea Drops Endpoints API** — Endpoints for discovering drops, checking mint eligibility, and building mint transactions
- **OpenSea Listing Endpoints API** — Listing endpoints for creating, fulfilling, and querying listings
- **OpenSea NFT Endpoints API** — NFT endpoints to retrieve individual NFTs, metadata, ownership, and rarity
- **OpenSea Offer Endpoints API** — Offer endpoints for building, creating, fulfilling, and querying offers
- **OpenSea Order Endpoints API** — Order endpoints for looking up and canceling individual orders
- **OpenSea Search Endpoints API** — Search endpoints for discovering collections, tokens, NFTs, and accounts
- **OpenSea Swap Endpoints API** — Swap endpoints for getting token swap quotes with executable transaction data
- **OpenSea Token Endpoints API** — Token endpoints for getting token details, balances, and trending data
- **OpenSea Tool Endpoints [Beta] API** — [Beta] Tool endpoints for discovering and inspecting registered onchain tools. This API is under active development and may change without notice.
- **OpenSea Transaction Endpoints API** — Transaction endpoints for checking transaction receipts and status

## Agentic access (1)

- **Opensea Agentic Access** — 83 operations · 22 acting

## Security (3)

- **Opensea Authentication** — apiKey · 1 scheme
- **Opensea Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Opensea Vulnerability Disclosure** — Bugcrowd · security.txt · contact published

## Plans (1)

- **Opensea Plans**

## Tags

NFT, Marketplace, Web3, Blockchain, Trading, Digital Assets

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/opensea/). Scores are computed from the provider's own public artifacts under a published rubric.