# How to integrate Open sea MCP with Hermes ```json { "title": "How to integrate Open sea MCP with Hermes", "toolkit": "Open sea", "toolkit_slug": "open_sea", "framework": "Hermes", "framework_slug": "hermes-agent", "url": "https://composio.dev/toolkits/open_sea/framework/hermes-agent", "markdown_url": "https://composio.dev/toolkits/open_sea/framework/hermes-agent.md", "updated_at": "2026-05-06T08:22:09.091Z" } ``` ## Introduction Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows. This guide explains the easiest and most robust way to connect your Open sea account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either. ## 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) - [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 ### What is Composio Connect? Composio Connect is a consumer offering that lets anyone plug 1,000+ applications directly into their agent harness — including Hermes. It can: - Search and load tools from relevant toolkits on-demand, reducing context usage. - Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM. - Manage app authentication end-to-end with zero manual overhead. ## Connect Open sea to Hermes ### Integrating Open sea with Hermes ### Using Composio Connect CLI 1. Install the Composio CLI Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you. ```bash curl -fsSL https://composio.dev/install | bash ``` ## 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 provides comprehensive access to Open sea operations through Composio. Once connected, Hermes can perform all major Open sea actions on your behalf using natural language commands. ## Complete Code None listed. ## Conclusion ### Way Forward With Open sea connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to. From here, you can extend Hermes further: - Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you. - Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft. - Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt. If you run into trouble or want to share what you've built, join the [community](https://discord.com/invite/composio) or check out the [Docs](https://docs.composio.dev?utm_source=toolkits&utm_medium=framework_template&utm_campaign=hermes&utm_content=docs) for deeper configuration options. ## 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) - [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 Hermes? Yes, you can. Hermes 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)