# How to integrate Blocknative MCP with Hermes ```json { "title": "How to integrate Blocknative MCP with Hermes", "toolkit": "Blocknative", "toolkit_slug": "blocknative", "framework": "Hermes", "framework_slug": "hermes-agent", "url": "https://composio.dev/toolkits/blocknative/framework/hermes-agent", "markdown_url": "https://composio.dev/toolkits/blocknative/framework/hermes-agent.md", "updated_at": "2026-05-06T08:03:10.433Z" } ``` ## Introduction Hermes is a 24/7 autonomous agent that lives on your computer or server โ€” it remembers what it learns and evolves as your usage grows. This guide explains the easiest and most robust way to connect your Blocknative 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 Blocknative with - [OpenAI Agents SDK](https://composio.dev/toolkits/blocknative/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/blocknative/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/blocknative/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/blocknative/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/blocknative/framework/codex) - [OpenClaw](https://composio.dev/toolkits/blocknative/framework/openclaw) - [CLI](https://composio.dev/toolkits/blocknative/framework/cli) - [Google ADK](https://composio.dev/toolkits/blocknative/framework/google-adk) - [LangChain](https://composio.dev/toolkits/blocknative/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/blocknative/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/blocknative/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/blocknative/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/blocknative/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 โ€” 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 Blocknative to Hermes ### Integrating Blocknative 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 Blocknative MCP server, and what's possible with it? The Blocknative MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Blocknative account. It provides structured and secure access to real-time mempool data and transaction management features across public blockchains, so your agent can monitor transactions, analyze gas prices, configure filters, and manage blockchain event subscriptions on your behalf. - Real-time mempool monitoring: Instruct your agent to subscribe to Ethereum transaction hashes or addresses and receive instant updates on their status and events. - Gas price analysis and estimation: Have your agent fetch current gas price distributions, base fee predictions, and inclusion probability estimates to help optimize transaction fees. - Customizable event filters: Let your agent configure advanced mempool filters and ABI decoding, so you can track only the events or transactions that matter to your workflow. - Multichain event subscriptions: Enable your agent to subscribe or unsubscribe to transaction and account events across multiple supported blockchains using the Blocknative multichain SDK. - Supported chain discovery: Ask your agent to list and discover which blockchains and gas oracles are available for monitoring and analytics. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `BLOCKNATIVE_CONFIGURE_FILTERS` | Configure Mempool Filters | Tool to configure filters and abi decoding for ethereum mempool transactions. use after establishing a blocknative websocket connection to set up event filters and decoding. | | `BLOCKNATIVE_GET_GAS_DISTRIBUTION` | Get Gas Price Distribution | Tool to retrieve the current mempool gas price distribution breakdown. use when analyzing gas price trends or preparing fee strategies. | | `BLOCKNATIVE_GET_GAS_ORACLES` | Get Gas Oracles | Tool to retrieve metadata on supported gas oracles per chain. use when you need to dynamically discover all available on-chain gas estimation oracles across networks. | | `BLOCKNATIVE_GET_GAS_PRICES` | Get Gas Prices | Tool to fetch gas price estimates for specific inclusion probabilities. use when you need gas price ranges for the next block or next ~10 seconds. | | `BLOCKNATIVE_GET_SUPPORTED_CHAINS` | Get Supported Chains | Tool to retrieve supported chains metadata. use when discovering available networks for blocknative gas services. | | `BLOCKNATIVE_PREDICTION_API_BASEFEE_ESTIMATES` | Get Base Fee Estimates | Tool to get real-time predictions for base fee and blob base fee for the next 5 blocks. use when you need both 99% and 50% confidence estimates for upcoming blocks. | | `BLOCKNATIVE_SUBSCRIBE_MULTICHAIN` | Subscribe Multichain | Tool to generate websocket subscription details for events across multiple chains. use when preparing to track a transaction hash or account address across chains via blocknative multichain sdk. | | `BLOCKNATIVE_SUBSCRIBE_TRANSACTION_HASH` | Subscribe Transaction Hash | Tool to subscribe to transaction state change events of an ethereum transaction hash. use after establishing a blocknative websocket connection to prepare the subscription message. | | `BLOCKNATIVE_UNSUBSCRIBE_MULTICHAIN` | Unsubscribe Multichain | Tool to unsubscribe from events across multiple chains using the multichain sdk. use after stopping monitoring of an address or transaction to clean up resources, e.g., call: blocknative.unsubscribe({ id: '0x..', chainid: '0x1' }). | | `BLOCKNATIVE_UNSUBSCRIBE_TRANSACTION_HASH` | Unsubscribe Transaction Hash | Tool to unsubscribe from transaction state change events for an ethereum transaction hash. use after establishing a blocknative websocket connection to prepare the unsubscription message. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Blocknative MCP server provides comprehensive access to Blocknative operations through Composio. Once connected, Hermes can perform all major Blocknative actions on your behalf using natural language commands. ## Complete Code None listed. ## Conclusion ### Way Forward With Blocknative 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 โ€” 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 Blocknative MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/blocknative/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/blocknative/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/blocknative/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/blocknative/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/blocknative/framework/codex) - [OpenClaw](https://composio.dev/toolkits/blocknative/framework/openclaw) - [CLI](https://composio.dev/toolkits/blocknative/framework/cli) - [Google ADK](https://composio.dev/toolkits/blocknative/framework/google-adk) - [LangChain](https://composio.dev/toolkits/blocknative/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/blocknative/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/blocknative/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/blocknative/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/blocknative/framework/crew-ai) ## Related Toolkits - [Supabase](https://composio.dev/toolkits/supabase) - Supabase is an open-source backend platform offering scalable Postgres databases, authentication, storage, and real-time APIs. It lets developers build modern apps without managing infrastructure. - [Codeinterpreter](https://composio.dev/toolkits/codeinterpreter) - Codeinterpreter is a Python-based coding environment with built-in data analysis and visualization. It lets you instantly run scripts, plot results, and prototype solutions inside supported platforms. - [GitHub](https://composio.dev/toolkits/github) - GitHub is a code hosting platform for version control and collaborative software development. It streamlines project management, code review, and team workflows in one place. - [Ably](https://composio.dev/toolkits/ably) - Ably is a real-time messaging platform for live chat and data sync in modern apps. It offers global scale and rock-solid reliability for seamless, instant experiences. - [Abuselpdb](https://composio.dev/toolkits/abuselpdb) - Abuselpdb is a central database for reporting and checking IPs linked to malicious online activity. Use it to quickly identify and report suspicious or abusive IP addresses. - [Alchemy](https://composio.dev/toolkits/alchemy) - Alchemy is a blockchain development platform offering APIs and tools for Ethereum apps. It simplifies building and scaling Web3 projects with robust infrastructure. - [Algolia](https://composio.dev/toolkits/algolia) - Algolia is a hosted search API that powers lightning-fast, relevant search experiences for web and mobile apps. It helps developers deliver instant, typo-tolerant, and scalable search without complex infrastructure. - [Anchor browser](https://composio.dev/toolkits/anchor_browser) - Anchor browser is a developer platform for AI-powered web automation. It transforms complex browser actions into easy API endpoints for streamlined web interaction. - [Apiflash](https://composio.dev/toolkits/apiflash) - Apiflash is a website screenshot API for programmatically capturing web pages. It delivers high-quality screenshots on demand for automation, monitoring, or reporting. - [Apiverve](https://composio.dev/toolkits/apiverve) - Apiverve delivers a suite of powerful APIs that simplify integration for developers. It's designed for reliability and scalability so you can build faster, smarter applications without the integration headache. - [Appcircle](https://composio.dev/toolkits/appcircle) - Appcircle is an enterprise-grade mobile CI/CD platform for building, testing, and publishing mobile apps. It streamlines mobile DevOps so teams ship faster and with more confidence. - [Appdrag](https://composio.dev/toolkits/appdrag) - Appdrag is a cloud platform for building websites, APIs, and databases with drag-and-drop tools and code editing. It accelerates development and iteration by combining hosting, database management, and low-code features in one place. - [Appveyor](https://composio.dev/toolkits/appveyor) - AppVeyor is a cloud-based continuous integration service for building, testing, and deploying applications. It helps developers automate and streamline their software delivery pipelines. - [Backendless](https://composio.dev/toolkits/backendless) - Backendless is a backend-as-a-service platform for mobile and web apps, offering database, file storage, user authentication, and APIs. It helps developers ship scalable applications faster without managing server infrastructure. - [Baserow](https://composio.dev/toolkits/baserow) - Baserow is an open-source no-code database platform for building collaborative data apps. It makes it easy for teams to organize data and automate workflows without writing code. - [Bench](https://composio.dev/toolkits/bench) - Bench is a benchmarking tool for automated performance measurement and analysis. It helps you quickly evaluate, compare, and track your systems or workflows. - [Better stack](https://composio.dev/toolkits/better_stack) - Better Stack is a monitoring, logging, and incident management solution for apps and services. It helps teams ensure application reliability and performance with real-time insights. - [Bitbucket](https://composio.dev/toolkits/bitbucket) - Bitbucket is a Git-based code hosting and collaboration platform for teams. It enables secure repository management and streamlined code reviews. - [Blazemeter](https://composio.dev/toolkits/blazemeter) - Blazemeter is a continuous testing platform for web and mobile app performance. It empowers teams to automate and analyze large-scale tests with ease. - [Bolt iot](https://composio.dev/toolkits/bolt_iot) - Bolt IoT is a platform for building and managing IoT projects with cloud-based device control and monitoring. It makes connecting sensors and actuators to the internet seamless for automation and data insights. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Blocknative MCP? With a standalone Blocknative MCP server, the agents and LLMs can only access a fixed set of Blocknative tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Blocknative 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 Blocknative tools. ### Can I manage the permissions and scopes for Blocknative while using Tool Router? Yes, absolutely. You can configure which Blocknative 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 Blocknative data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) ยท [Composio docs](https://docs.composio.dev/llms.txt)