A tool for looking up OpenSea marketplace information about NFTs, collections, tokens, wallets, and activity.

Use it to check floor prices, collection statistics, NFT details, token data, trends, drops, events, searches, favourites, profiles, and collection settings.

It gathers marketplace data through several interfaces, so you do not need to build each lookup yourself or use trading tools for read-only questions.

opensea-api — Skill for Claude Code and Codex by ProjectOpenSea

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add ProjectOpenSea/opensea-skill --skill opensea-api

Clone the repo

git clone --depth 1 https://github.com/ProjectOpenSea/opensea-skill

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/projectopensea/opensea-skill/opensea-api/github.svg)](https://agentmods.dev/skills/projectopensea/opensea-skill/opensea-api)

Your own site

<a href="https://agentmods.dev/skills/projectopensea/opensea-skill/opensea-api"><img src="https://agentmods.dev/badge/skills/projectopensea/opensea-skill/opensea-api/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/projectopensea/opensea-skill/opensea-api"><img src="https://agentmods.dev/badge/skills/projectopensea/opensea-skill/opensea-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 11,908 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00079	$0.11908
Opus 5.5	$0.00032	$0.04763
Sonnet 5.5	$0.00016	$0.02382
Haiku 4.5	$0.00008	$0.01191

Measured 21d ago against content hash 94ed9a653686, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

opensea-api scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 21d ago.

The scan reads SKILL.md. This mod also ships 56 executable files (scripts/_response-markers.sh, scripts/accounts/opensea-account-closed-positions.sh, scripts/accounts/opensea-account-collections.sh, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- curl

opensea-api/SKILL.md · 889 lines

How it starts

The opening of the file, as written. The whole thing — 889 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenSea API

Query NFT and token data, browse drops, stream events, and search across Ethereum, Base, Arbitrum, Optimism, Polygon, and more.

When to use this skill (`scope_in`)

Use opensea-api for:

Collection details, stats, traits, trending, and top collections
NFT details, ownership, metadata refresh
Token details, trending tokens, top tokens, token groups
Search across collections, NFTs, tokens, and accounts
Search and discover registered AI agent tools (ERC-8257)
Reading marketplace listings, offers, and orders (not executing them)
Events and activity monitoring (including real-time WebSocket streams)
Drops and mint eligibility
Account lookups and ENS resolution
Authenticated profile, collection settings, watchlist, drop, order-cancellation, and wallet-linking operations described in references/authentication.md
Headless SIWE, scoped PAT creation, short-lived JWT exchange, and wallet-authenticated REST or MCP

When NOT to use this skill (`scope_out`, handoff)

Need	Use instead
Buy/sell NFTs (fulfill listings or offers)	`opensea-marketplace`
Create new listings or offers	`opensea-marketplace`
Cross-chain NFT purchases	`opensea-marketplace`
Swap ERC20 tokens	`opensea-swaps`
Set up wallet signing providers	`opensea-wallet`
Build/register/gate AI agent tools	`opensea-tool-sdk`

Quick start

# Resolve an API key: reuses your env var / a cached instant key, or fetches a
# new instant key (no signup) AND saves it to disk for reuse. See
# "API key resolution" below — always save and reuse a fetched key.
export OPENSEA_API_KEY=$(scripts/auth/opensea-resolve-key.sh)

# Install the CLI globally (or use npx)
npm install -g @opensea/cli

# Get collection info
opensea collections get boredapeyachtclub

# Get floor price and volume stats
opensea collections stats boredapeyachtclub

# Get NFT details
opensea nfts get ethereum 0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d 1234

# Search across OpenSea
opensea search "cool cats"

# Get trending tokens
opensea tokens trending --limit 5

Read the full file on GitHub · 889 lines

Files

What ships with it

59 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

21d ago Changed · +45 lines 94ed9a653686
25d ago Changed · +13 lines 1b05b003d3e5
1mo ago Changed c1e94903c3da
1mo ago First seen · 831 lines · 79 tokens per session scan A b8b0aff1513f

Subscribe to this mod's changes

opensea-api is a skill published in the GitHub repository ProjectOpenSea/opensea-skill (54 stars, last pushed 16d ago), licensed MIT. It adds 79 tokens to every session and 11,908 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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opensea-api