# How to integrate Open sea MCP with Claude Code

```json
{
  "title": "How to integrate Open sea MCP with Claude Code",
  "toolkit": "Open sea",
  "toolkit_slug": "open_sea",
  "framework": "Claude Code",
  "framework_slug": "claude-code",
  "url": "https://composio.dev/toolkits/open_sea/framework/claude-code",
  "markdown_url": "https://composio.dev/toolkits/open_sea/framework/claude-code.md",
  "updated_at": "2026-05-12T10:20:45.461Z"
}
```

## Introduction

Manage your Open sea directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns.
You can do this in two different ways:
- Via [Composio Connect](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=claude-code&utm_content=composio_connect&next=%2F~%2Forg%2Fconnect%2Fclients%2Fclaude-code) - Direct and easiest approach
- Via [Composio SDK](https://docs.composio.dev/docs?utm_source=toolkits&utm_medium=framework_template&utm_campaign=claude-code&utm_content=composio_sdk) - Programmatic approach with more control

## Also integrate Open sea with

- [OpenAI Agents SDK](https://composio.dev/toolkits/open_sea/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/open_sea/framework/claude-agents-sdk)
- [Claude Cowork](https://composio.dev/toolkits/open_sea/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/open_sea/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/open_sea/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/open_sea/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/open_sea/framework/cli)
- [Google ADK](https://composio.dev/toolkits/open_sea/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/open_sea/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/open_sea/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/open_sea/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/open_sea/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/open_sea/framework/crew-ai)

## TL;DR

- Only one MCP URL to connect multiple apps with Claude Code with zero auth hassles.
- Programmatic tool calling allows LLMs to write its code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
- Handling Large tool responses out of LLM context to minimize context rot.
- Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so LLMs aren't overwhelmed by tools you don't need.

## Connect Open sea to Claude Code

### Connecting Open sea to Claude Code using Composio
1. Add the Composio MCP to Claude

```bash
claude mcp add --scope user --transport http composio https://connect.composio.dev/mcp
```

## What is Claude Code?

Claude Code is Anthropic's command line developer tool that lets you use Claude directly inside your terminal. Instead of switching between your editor, browser, and chat, you can stay in your project folder and ask Claude to help you build, debug, refactor, and understand code right where you're working.
Key features include:
- Terminal-Native Experience: Work with Claude directly in your command line without switching contexts
- MCP Support: Built-in support for Model Context Protocol servers to extend Claude's capabilities
- Project Context: Claude understands your project structure and can read, write, and modify files
- Interactive Development: Ask questions, debug code, and get help in real-time while coding
- Multi-Platform: Works on macOS, Linux, WSL, and Windows

## What is the Open sea MCP server, and what's possible with it?

The Open sea MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your OpenSea account. It provides structured and secure access to your NFT marketplace activity, so your agent can perform actions like listing NFTs for sale, creating and fulfilling offers, checking account details, and managing your marketplace orders on your behalf.
- NFT listing automation: Quickly list any ERC721 or ERC1155 NFT for sale on OpenSea, specifying price and collection details—all handled by your agent.
- Offer creation and management: Instruct your agent to create criteria-based or single-item offers to purchase specific NFTs or those matching certain traits within a collection.
- Order and listing fulfillment: Let your agent retrieve all necessary information and signatures to fulfill existing listings or offers, making transactions seamless and secure.
- Marketplace activity insights: Have the agent pull your profile details, fetch all active listings or offers for a given collection, and provide you with up-to-date marketplace snapshots.
- Order cancellation and management: Direct your agent to cancel open orders, listings, or offers off-chain, helping you stay in control of your marketplace participation with ease.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `OPEN_SEA_BUILD_CRITERIA_OFFER` | Build criteria offer | Build a portion of a criteria offer including the merkle tree needed to post an offer. |
| `OPEN_SEA_CANCEL_ORDER` | Cancel order | Offchain cancel a single order, offer or listing, by its order hash when protected by the SignedZone. Protocol and Chain are required to prevent hash collisions. Please note cancellation is only assured if a fulfillment signature was not vended prior to cancellation. |
| `OPEN_SEA_CREATE_CRITERIA_OFFER` | Create criteria offer | Create a criteria offer to purchase any NFT in a collection or which matches the specified trait. |
| `OPEN_SEA_CREATE_ITEM_OFFER` | Create item offer | Create an offer to purchase a single NFT (ERC721 or ERC1155). |
| `OPEN_SEA_CREATE_LISTING` | Create listing | List a single NFT (ERC721 or ERC1155) for sale on the OpenSea marketplace. |
| `OPEN_SEA_FULFILL_LISTING` | Fulfill listing | Retrieve all the information, including signatures, needed to fulfill a listing directly onchain. |
| `OPEN_SEA_FULFILL_OFFER` | Fulfill offer | Retrieve all the information, including signatures, needed to fulfill an offer directly onchain. |
| `OPEN_SEA_GET_ACCOUNT` | Get account | Get an OpenSea Account Profile including details such as bio, social media usernames, and profile image. |
| `OPEN_SEA_GET_ALL_LISTINGS_BY_COLLECTION` | Get all listings by collection | Get all active, valid listings for a single collection. |
| `OPEN_SEA_GET_ALL_OFFERS_BY_COLLECTION` | Get all offers by collection | Get all active, valid offers for the specified collection. This includes individual and criteria offers. |
| `OPEN_SEA_GET_BEST_LISTING_BY_NFT` | Get best listing by nft | Get the best listing for an NFT. |
| `OPEN_SEA_GET_BEST_LISTINGS_BY_COLLECTION` | Get best listings by collection | Get the cheapest priced active, valid listings on a single collection. |
| `OPEN_SEA_GET_BEST_OFFER_BY_NFT` | Get best offer by nft | Get the best offers for an NFT. |
| `OPEN_SEA_GET_COLLECTION` | Get collection | Get a single collection including details such as fees, traits, and links. |
| `OPEN_SEA_GET_COLLECTIONS` | Get collections | Get a list of OpenSea collections with optional filtering and pagination. |
| `OPEN_SEA_GET_COLLECTION_STATS` | Get collection stats | Get stats for a single collection on OpenSea. |
| `OPEN_SEA_GET_CONTRACT` | Get contract | Get a smart contract for a given chain and address. |
| `OPEN_SEA_GET_EVENTS` | Get events | Get a list of events from OpenSea based on various filters like timestamps and event types. |
| `OPEN_SEA_GET_LISTINGS` | Get listings | Get the complete set of active, valid listings. |
| `OPEN_SEA_GET_NFT` | Get nft | Get metadata, traits, ownership information, and rarity for a single NFT. |
| `OPEN_SEA_GET_ORDER` | Get order | Get a single order, offer or listing, by its order hash. Protocol and Chain are required to prevent hash collisions. |
| `OPEN_SEA_GET_PAYMENT_TOKEN` | Get payment token | Get a smart contract for a given chain and address. |
| `OPEN_SEA_GET_TRAITS` | Get traits | Get the traits in a collection. |
| `OPEN_SEA_REFRESH_NFT_METADATA` | Refresh nft metadata | Refresh metadata for a single NFT. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Open sea MCP server is an implementation of the Model Context Protocol that connects Claude Code (and other AI assistants like Claude and Cursor) directly to your Open sea account. It provides structured and secure access so Claude can perform Open sea operations on your behalf.
With Composio's managed implementation, you don't have to create your own developer app. For production, if you're building an end product, we recommend using your own credentials. The managed server helps you prototype fast and go from 0-1 faster.

## Step-by-step Guide

### 1. Prerequisites

Before starting, make sure you have:
- Claude Pro, Max, or API billing enabled Anthropic account
- Composio API Key
- A Open sea account
- Basic knowledge of Python or TypeScript

### 1. Install Claude Code

To install Claude Code, use one of the following methods based on your operating system:
```bash
# macOS, Linux, WSL
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell
irm https://claude.ai/install.ps1 | iex

# Windows CMD
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd
```

### 2. Set up Claude Code

Open a terminal, go to your project folder, and start Claude Code:
- Claude Code will open in your terminal
- Follow the prompts to sign in with your Anthropic account
- Complete the authentication flow
- Once authenticated, you can start using Claude Code
```bash
cd your-project-folder
claude
```

### 3. Set up environment variables

Create a .env file in your project root with the following variables:
- COMPOSIO_API_KEY authenticates with Composio (get it from [Composio dashboard](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=claude-code&utm_content=api_key&next=%2F~%2Forg%2Fconnect%2Fclients%2Fclaude-code))
- USER_ID identifies the user for session management (use any unique identifier)
```bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
```

### 4. Install Composio library

No description provided.
```python
pip install composio-core python-dotenv
```

```typescript
npm install @composio/core dotenv
```

### 5. Generate Composio MCP URL

No description provided.
```python
import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()

COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
USER_ID = os.getenv("USER_ID")

composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=USER_ID,
    toolkits=["open_sea"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url

print(f"MCP URL: {COMPOSIO_MCP_URL}")
print(f"\nUse this command to add to Claude Code:")
print(f'claude mcp add --transport http open_sea-composio "{COMPOSIO_MCP_URL}" --headers "X-API-Key:{COMPOSIO_API_KEY}"')
```

```typescript
import 'dotenv/config';
import { Composio } from '@composio/core';

const { COMPOSIO_API_KEY, USER_ID } = process.env;

if (!COMPOSIO_API_KEY || !USER_ID) {
  throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}

const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['open_sea'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http open_sea-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);
```

### 6. Run the script and copy the MCP URL

No description provided.
```python
python generate_mcp_url.py
```

```typescript
node --loader ts-node/esm generate_mcp_url.ts
# or if using tsx
tsx generate_mcp_url.ts
```

### 7. Add Open sea MCP to Claude Code

In your terminal, add the MCP server using the command from the previous step. The command format is:
- claude mcp add registers a new MCP server with Claude Code
- --transport http specifies that this is an HTTP-based MCP server
- The server name (open_sea-composio) is how you'll reference it
- The URL points to your Composio Tool Router session
- --headers includes your Composio API key for authentication
After running the command, close the current Claude Code session and start a new one for the changes to take effect.
```bash
claude mcp add --transport http open_sea-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"

# Then restart Claude Code
exit
claude
```

### 8. Verify the installation

Check that your Open sea MCP server is properly configured.
- This command lists all MCP servers registered with Claude Code
- You should see your open_sea-composio entry in the list
- This confirms that Claude Code can now access Open sea tools
If everything is wired up, you should see your open_sea-composio entry listed:
```bash
claude mcp list
```

### 9. Authenticate Open sea

The first time you try to use Open sea tools, you'll be prompted to authenticate.
- Claude Code will detect that you need to authenticate with Open sea
- It will show you an authentication link
- Open the link in your browser (or copy/paste it)
- Complete the Open sea authorization flow
- Return to the terminal and start using Open sea through Claude Code
Once authenticated, you can ask Claude Code to perform Open sea operations in natural language. For example:
- "List my NFT for sale on OpenSea"
- "Show all active listings in Bored Ape collection"
- "Create an offer for a specific CryptoPunk"

## Complete Code

```python
import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()

COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
USER_ID = os.getenv("USER_ID")

composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=USER_ID,
    toolkits=["open_sea"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url

print(f"MCP URL: {COMPOSIO_MCP_URL}")
print(f"\nUse this command to add to Claude Code:")
print(f'claude mcp add --transport http open_sea-composio "{COMPOSIO_MCP_URL}" --headers "X-API-Key:{COMPOSIO_API_KEY}"')
```

```typescript
import 'dotenv/config';
import { Composio } from '@composio/core';

const { COMPOSIO_API_KEY, USER_ID } = process.env;

if (!COMPOSIO_API_KEY || !USER_ID) {
  throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}

const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['open_sea'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http open_sea-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);
```

## Conclusion

You've successfully integrated Open sea with Claude Code using Composio's MCP server. Now you can interact with Open sea directly from your terminal using natural language commands.
Key features of this setup:
- Terminal-native experience without switching contexts
- Natural language commands for Open sea operations
- Secure authentication through Composio's managed MCP
- Tool Router for dynamic tool discovery and execution
Next steps:
- Try asking Claude Code to perform various Open sea operations
- Add more toolkits to your Tool Router session for multi-app workflows
- Integrate this setup into your development workflow for increased productivity
You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.

## How to build Open sea MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/open_sea/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/open_sea/framework/claude-agents-sdk)
- [Claude Cowork](https://composio.dev/toolkits/open_sea/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/open_sea/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/open_sea/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/open_sea/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/open_sea/framework/cli)
- [Google ADK](https://composio.dev/toolkits/open_sea/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/open_sea/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/open_sea/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/open_sea/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/open_sea/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/open_sea/framework/crew-ai)

## Related Toolkits

- [Addresszen](https://composio.dev/toolkits/addresszen) - Addresszen is a real-time address autocomplete and verification service. It helps capture accurate, deliverable addresses with instant suggestions and validation.
- [Asin data api](https://composio.dev/toolkits/asin_data_api) - Asin data api gives you detailed, real-time product data from Amazon, including price, rank, and reviews. Perfect for e-commerce pros and data-driven marketers who need instant marketplace insights.
- [Baselinker](https://composio.dev/toolkits/baselinker) - BaseLinker is an all-in-one e-commerce management platform connecting stores, marketplaces, carriers, and more. It streamlines order processing, inventory control, and automates your sales operations.
- [Bestbuy](https://composio.dev/toolkits/bestbuy) - Best Buy is a leading retailer offering APIs for product, store, and recommendation data. Instantly access up-to-date retail insights for smarter shopping and decision-making.
- [Btcpay server](https://composio.dev/toolkits/btcpay_server) - BTCPay Server is a free, open-source, self-hosted Bitcoin payment processor. It lets merchants accept Bitcoin payments directly, cutting out middlemen and boosting privacy.
- [Cdr platform](https://composio.dev/toolkits/cdr_platform) - Cdr platform is an API for purchasing carbon dioxide removal services. It enables businesses to offset emissions by accessing verified carbon removal projects.
- [Cloudcart](https://composio.dev/toolkits/cloudcart) - CloudCart is an e-commerce platform for building and managing online stores. It helps businesses streamline product listings, orders, and customer engagement.
- [Countdown api](https://composio.dev/toolkits/countdown_api) - Countdown API gives you real-time, structured eBay product data, reviews, and seller feedback. Perfect for powering price monitoring, product research, or marketplace analytics workflows.
- [Dpd2](https://composio.dev/toolkits/dpd2) - Dpd2 is a robust email management platform for handling, sorting, and automating email workflows. Streamline your communications and boost productivity with advanced sorting, labeling, and response tools.
- [Finerworks](https://composio.dev/toolkits/finerworks) - FinerWorks is an online platform for fine art and photo printing services. Artists and photographers use it to order custom prints and manage print inventory efficiently.
- [Fingertip](https://composio.dev/toolkits/fingertip) - Fingertip is a business management platform for selling, booking, and customer engagement—all from a single link. It helps businesses streamline operations and connect with customers across social channels.
- [Fraudlabs pro](https://composio.dev/toolkits/fraudlabs_pro) - FraudLabs Pro is an online payment fraud detection service for e-commerce and merchants. It helps minimize chargebacks and revenue loss by detecting and preventing fraudulent transactions.
- [Gift up](https://composio.dev/toolkits/gift_up) - Gift Up! is a digital platform for selling, managing, and redeeming gift cards online. It streamlines promotions and gift card transactions for businesses and their customers.
- [Goody](https://composio.dev/toolkits/goody) - Goody is a gifting platform that lets users send gifts and physical products without handling logistics. It streamlines gifting by managing delivery, fulfillment, and recipient experience.
- [Gumroad](https://composio.dev/toolkits/gumroad) - Gumroad is a platform for selling digital products, physical goods, and memberships with a simple checkout and marketing tools. It streamlines creator payouts and helps you grow your audience effortlessly.
- [Instacart](https://composio.dev/toolkits/instacart) - Instacart is an online grocery delivery and pickup service platform. It lets you discover local retailers and create shoppable lists and recipes with ease.
- [Junglescout](https://composio.dev/toolkits/junglescout) - Junglescout is an Amazon product research and analytics platform for sellers. It delivers sales estimates, competitive insights, and optimization tools to boost your Amazon business.
- [Ko fi](https://composio.dev/toolkits/ko_fi) - Ko-fi is a platform that lets creators receive donations, memberships, and sales from fans. It helps creators monetize their work and grow their audience with minimal friction.
- [Lemon squeezy](https://composio.dev/toolkits/lemon_squeezy) - Lemon Squeezy is a payments and subscription platform built for software companies. It makes managing payments, taxes, and customer subscriptions effortless.
- [Loyverse](https://composio.dev/toolkits/loyverse) - Loyverse is a point-of-sale (POS) platform for small businesses, offering tools for sales, inventory, and customer loyalty. It helps streamline retail operations and boost customer engagement.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Open sea MCP?

With a standalone Open sea MCP server, the agents and LLMs can only access a fixed set of Open sea tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Open sea and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Claude Code?

Yes, you can. Claude Code fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Open sea tools.

### Can I manage the permissions and scopes for Open sea while using Tool Router?

Yes, absolutely. You can configure which Open sea scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Open sea data and credentials are handled as safely as possible.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)