# How to integrate Blocknative MCP with Atomic Agent ```json { "title": "How to integrate Blocknative MCP with Atomic Agent", "toolkit": "Blocknative", "toolkit_slug": "blocknative", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/blocknative/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/blocknative/framework/atomic-agent.md", "updated_at": "2026-08-11T13:06:56.166Z" } ``` ## Introduction Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Blocknative. This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Blocknative account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## 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) - [Hermes](https://composio.dev/toolkits/blocknative/framework/hermes-agent) - [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) - [Pydantic AI](https://composio.dev/toolkits/blocknative/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/blocknative/framework/autogen) ## TL;DR ### How Atomic Agent connects to Blocknative Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication. Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account. ## Connect Blocknative to Atomic Agent ### Connect Blocknative to Atomic Agent - Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key. - In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart. - Ask Atomic Agent to do something in Blocknative. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Blocknative account, then return to Atomic Agent to continue. ### Headless setup Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file. ```bash COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY ``` ## 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 | Get real-time gas fee predictions for Ethereum mainnet's next 5 blocks. Returns base fee, blob base fee, and priority fee estimates at multiple confidence levels (99% and 50%). Essential for optimizing transaction costs and timing. Predictions include current block context (block number, time since last block) and estimated fees in gwei. | | `BLOCKNATIVE_SUBSCRIBE_MULTICHAIN` | Subscribe Multichain | Generate WebSocket connection details to subscribe to real-time blockchain events (transactions or account activity) across multiple chains via Blocknative's Multichain API. Returns the WebSocket URL and subscription message payload needed to establish the connection and start receiving event notifications for a specific transaction hash or account address on any supported blockchain. | | `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. ## Troubleshooting ### Why is my API key rejected? Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying. ### Why are Composio tools unavailable after saving a key? Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk. ### Does Composio have a free plan? The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection. ## Complete Code None listed. ## Conclusion ### Use Blocknative from Atomic Agent With your account connected, ask Atomic Agent to work with Blocknative in natural language. You can connect more apps through the same Composio integration as you need them. Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo). ## 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) - [Hermes](https://composio.dev/toolkits/blocknative/framework/hermes-agent) - [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) - [Pydantic AI](https://composio.dev/toolkits/blocknative/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/blocknative/framework/autogen) ## 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. 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Use it to discover, compare, and evaluate 30K+ AWS Marketplace listings faster. - [Azure Monitor Activity Log](https://composio.dev/toolkits/azure_monitor_activity_log) - Azure Monitor Activity Log is Azure's service that records management and control-plane events for a subscription. Use it to audit changes, troubleshoot issues, and track resource operations across your Azure resources. - [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. ## 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 Atomic Agent? Yes, you can. Atomic Agent 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)