# How to integrate Open sea MCP with Google ADK ```json { "title": "How to integrate Open sea MCP with Google ADK", "toolkit": "Open sea", "toolkit_slug": "open_sea", "framework": "Google ADK", "framework_slug": "google-adk", "url": "https://composio.dev/toolkits/open_sea/framework/google-adk", "markdown_url": "https://composio.dev/toolkits/open_sea/framework/google-adk.md", "updated_at": "2026-05-12T10:20:45.461Z" } ``` ## Introduction This guide walks you through connecting Open sea to Google ADK using the Composio tool router. By the end, you'll have a working Open sea agent that can list your nft for sale on opensea, show all active listings in bored ape collection, create an offer for a specific cryptopunk through natural language commands. This guide will help you understand how to give your Google ADK agent real control over a Open sea account through Composio's Open sea MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved. ## 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 Code](https://composio.dev/toolkits/open_sea/framework/claude-code) - [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) - [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 Here's what you'll learn: - Get a Open sea account set up and connected to Composio - Install the Google ADK and Composio packages - Create a Composio Tool Router session for Open sea - Build an agent that connects to Open sea through MCP - Interact with Open sea using natural language ## What is Google ADK? Google ADK (Agents Development Kit) is Google's framework for building AI agents powered by Gemini models. It provides tools for creating agents that can use external services through the Model Context Protocol. Key features include: - Gemini Integration: Native support for Google's Gemini models - MCP Toolset: Built-in support for Model Context Protocol tools - Streamable HTTP: Connect to external services through streamable HTTP - CLI and Web UI: Run agents via command line or web interface ## 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 your AI agent to Open sea. It provides structured and secure access so your agent can perform Open sea operations on your behalf through a secure, permission-based interface. 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: - A Google API key for Gemini models - A Composio account and API key - Python 3.9 or later installed - Basic familiarity with Python ### 1. Getting API Keys for Google and Composio Google API Key - Go to [Google AI Studio](https://aistudio.google.com/app/apikey) and create an API key. - Copy the key and keep it safe. You will put this in GOOGLE_API_KEY. Composio API Key and User ID - Log in to the [Composio dashboard](https://dashboard.composio.dev?utm_source=toolkits&utm_medium=framework_docs). - Go to Settings → API Keys and copy your Composio API key. Use this for COMPOSIO_API_KEY. - Decide on a stable user identifier to scope sessions, often your email or a user ID. Use this for COMPOSIO_USER_ID. ### 2. Install dependencies Inside your virtual environment, install the required packages. What's happening: - google-adk is Google's Agents Development Kit - composio connects your agent to Open sea via MCP - python-dotenv loads environment variables ```bash pip install google-adk composio python-dotenv ``` ### 3. Set up ADK project Set up a new Google ADK project. What's happening: - This creates an agent folder with a root agent file and .env file ```bash adk create my_agent ``` ### 4. Set environment variables Save all your credentials in the .env file. What's happening: - GOOGLE_API_KEY authenticates with Google's Gemini models - COMPOSIO_API_KEY authenticates with Composio - COMPOSIO_USER_ID identifies the user for session management ```bash GOOGLE_API_KEY=your-google-api-key COMPOSIO_API_KEY=your-composio-api-key COMPOSIO_USER_ID=your-user-id-or-email ``` ### 5. Import modules and validate environment What's happening: - os reads environment variables - Composio is the main Composio SDK client - GoogleProvider declares that you are using Google ADK as the agent runtime - Agent is the Google ADK LLM agent class - McpToolset lets the ADK agent call MCP tools over HTTP ```python import os import warnings from composio import Composio from dotenv import load_dotenv from google.adk.agents.llm_agent import Agent from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams from google.adk.tools.mcp_tool.mcp_toolset import McpToolset load_dotenv() warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*") GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY") COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY") COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID") if not GOOGLE_API_KEY: raise ValueError("GOOGLE_API_KEY is not set in the environment.") if not COMPOSIO_API_KEY: raise ValueError("COMPOSIO_API_KEY is not set in the environment.") if not COMPOSIO_USER_ID: raise ValueError("COMPOSIO_USER_ID is not set in the environment.") ``` ### 6. Create Composio client and Tool Router session What's happening: - Authenticates to Composio with your API key - Declares Google ADK as the provider - Spins up a short-lived MCP endpoint for your user and selected toolkit - Stores the MCP HTTP URL for the ADK MCP integration ```python composio_client = Composio(api_key=COMPOSIO_API_KEY) composio_session = composio_client.create( user_id=COMPOSIO_USER_ID, toolkits=["open_sea"], ) COMPOSIO_MCP_URL = composio_session.mcp.url, print(f"Composio MCP URL: {COMPOSIO_MCP_URL}") ``` ### 7. Set up the McpToolset and create the Agent What's happening: - Connects the ADK agent to the Composio MCP endpoint through McpToolset - Uses Gemini as the model powering the agent - Lists exact tool names in instruction to reduce misnamed tool calls ```python composio_toolset = McpToolset( connection_params=StreamableHTTPConnectionParams( url=COMPOSIO_MCP_URL, headers={"x-api-key": COMPOSIO_API_KEY} ) ) root_agent = Agent( model="gemini-2.5-flash", name="composio_agent", description="An agent that uses Composio tools to perform actions.", instruction=( "You are a helpful assistant connected to Composio. " "You have the following tools available: " "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, " "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. " "Use these tools to help users with Open sea operations." ), tools=[composio_toolset], ) print("\nAgent setup complete. You can now run this agent directly ;)") ``` ### 8. Run the agent Execute the agent from the project root. The web command opens a web portal where you can chat with the agent. What's happening: - adk run runs the agent in CLI mode - adk web . opens a web UI for interactive testing ```bash # Run in CLI mode adk run my_agent # Or run in web UI mode adk web ``` ## Complete Code ```python import os import warnings from composio import Composio from composio_google import GoogleProvider from dotenv import load_dotenv from google.adk.agents.llm_agent import Agent from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams from google.adk.tools.mcp_tool.mcp_toolset import McpToolset load_dotenv() warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*") GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY") COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY") COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID") if not GOOGLE_API_KEY: raise ValueError("GOOGLE_API_KEY is not set in the environment.") if not COMPOSIO_API_KEY: raise ValueError("COMPOSIO_API_KEY is not set in the environment.") if not COMPOSIO_USER_ID: raise ValueError("COMPOSIO_USER_ID is not set in the environment.") composio_client = Composio(api_key=COMPOSIO_API_KEY, provider=GoogleProvider()) composio_session = composio_client.create( user_id=COMPOSIO_USER_ID, toolkits=["open_sea"], ) COMPOSIO_MCP_URL = composio_session.mcp.url composio_toolset = McpToolset( connection_params=StreamableHTTPConnectionParams( url=COMPOSIO_MCP_URL, headers={"x-api-key": COMPOSIO_API_KEY} ) ) root_agent = Agent( model="gemini-2.5-flash", name="composio_agent", description="An agent that uses Composio tools to perform actions.", instruction=( "You are a helpful assistant connected to Composio. " "You have the following tools available: " "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, " "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. " "Use these tools to help users with Open sea operations." ), tools=[composio_toolset], ) print("\nAgent setup complete. You can now run this agent directly ;)") ``` ## Conclusion You've successfully integrated Open sea with the Google ADK through Composio's MCP Tool Router. Your agent can now interact with Open sea using natural language commands. Key takeaways: - The Tool Router approach dynamically routes requests to the appropriate Open sea tools - Environment variables keep your credentials secure and separate from code - Clear agent instructions reduce tool calling errors - The ADK web UI provides an interactive interface for testing and development You can extend this setup by adding more toolkits to the toolkits array in your session configuration. ## 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 Code](https://composio.dev/toolkits/open_sea/framework/claude-code) - [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) - [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 Google ADK? Yes, you can. Google ADK 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)