# ProjectOpenSea/seaport

Seaport is a marketplace protocol for safely and efficiently buying and selling NFTs.

Repository: https://github.com/ProjectOpenSea/seaport
Canonical: https://ross.abutalabs.com/products/seaport
Language: Solidity
License: MIT
License Family: permissive
Last push: 2026-08-25T16:30:32+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 1686, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2255, forks 654 (observed 2026-08-28T04:06:31.243447+00:00)

## What it is
Seaport is a Solidity-based marketplace protocol for safely and efficiently buying and selling NFTs, with listings composed of arbitrary offers and consideration items. It is deployed across many EVM chains and split into companion repositories (seaport-core, seaport-types, seaport-sol) for integration.

## Use cases
- build an NFT marketplace on EVM chains
- implement on-chain NFT buy and sell orders
- integrate Seaport order fulfillment into a dapp
- create partial or advanced NFT listings with consideration items
- audit or extend a battle-tested NFT trading protocol
- deploy a cross-chain NFT trading contract

## When to choose
- you need a widely audited, production-proven NFT marketplace protocol
- you want flexible order structures with multiple offers and considerations
- you need canonical cross-chain deployments on many EVM networks

## When to avoid
- you need a non-EVM blockchain
- you want a simple fixed-price listing without protocol complexity
- you need a ready-made frontend rather than smart contracts

## Facets
- artifact type: library
- maturity: active
- function: blockchain, security, sdk
- domain: blockchain, e-commerce, web-development
- platform: -
- tags: nft-marketplace, smart-contracts, solidity, web3, opensea, evm, defi, cryptocurrency, ethereum

## Member repositories
- ProjectOpenSea/seaport (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:31.243447+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:43:44.187196+00:00, confidence not recorded.
  - readme: https://github.com/ProjectOpenSea/seaport (fetched 2026-08-28T04:06:31.243447+00:00, sha a5d06e96c02f)
- Data as of 2026-08-30T08:39:29.467469+00:00.