Blocknative MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Blocknative MCP or direct API to monitor mempool activity, track pending transactions, analyze gas fees, and detect transaction status changes through natural language.

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Api Key

Blocknative delivers real-time mempool monitoring and transaction management for public blockchains. Instantly track pending transactions and optimize blockchain interactions with live data.

10 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

Every Blocknative action and event your agent gets out of the box.

Configure Mempool Filters

Tool to configure filters and ABI decoding for Ethereum mempool transactions.

Get Gas Price Distribution

Tool to retrieve the current mempool gas price distribution breakdown.

Get Gas Oracles

Tool to retrieve metadata on supported gas oracles per chain.

Get Gas Prices

Tool to fetch gas price estimates for specific inclusion probabilities.

Get Supported Chains

Tool to retrieve supported chains metadata.

Get Base Fee Estimates

Get real-time gas fee predictions for Ethereum mainnet's next 5 blocks.

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.

Subscribe Transaction Hash

Tool to subscribe to transaction state change events of an Ethereum transaction hash.

Unsubscribe Multichain

Tool to unsubscribe from events across multiple chains using the Multichain SDK.

Unsubscribe Transaction Hash

Tool to unsubscribe from transaction state change events for an Ethereum transaction hash.

SETUP GUIDE

Connect Blocknative MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK and Claude Agent SDK
2

Create Tool Router Session

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

const composio = new Composio({ apiKey: 'your-api-key' });

console.log("Creating Tool Router session...");
const { mcp } = await composio.create('your-user-id');
console.log(`Tool Router session created: ${mcp.url}`);
Initialize the Composio client and create a Tool Router session
3

Connect to AI Agent

typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText, stepCountIs } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: mcp.url,
    headers: { 'x-api-key': 'your-composio-api-key' }
  }
});

const tools = await client.tools();

const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{ role: 'user', content: 'Get gas price estimates for Ethereum mainnet' }],
  stopWhen: stepCountIs( 5 )
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent
SETUP GUIDE

Connect Blocknative API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute Blocknative Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Show me the real-time gas price distribution for Ethereum mainnet right now.'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute Blocknative actions with your Agent

Why Use Composio?

AI Native Blocknative Integration

  • Supports both Blocknative MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Blocknative data

Managed Auth

  • Central place to manage, scope, and revoke Blocknative API key access
  • No more hard-coded secrets—Composio handles credentials for every user and environment
  • API key securely stored and rotated when needed

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Blocknative
  • Scoped, least privilege access to Blocknative resources
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Blocknative requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

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Managed auth, hosted MCP servers, and every Blocknative tool your agent needs.Free to start.

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