# Blocknative

```json
{
  "name": "Blocknative",
  "slug": "blocknative",
  "url": "https://composio.dev/toolkits/blocknative",
  "markdown_url": "https://composio.dev/toolkits/blocknative.md",
  "logo_url": "https://logos.composio.dev/api/blocknative",
  "categories": [
    "developer tools & devops"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-05-12T10:03:23.260Z"
}
```

![Blocknative logo](https://logos.composio.dev/api/blocknative)

## Description

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.

## Summary

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

## Categories

- developer tools & devops

## Toolkit Details

- Tools: 10

## Images

- Logo: https://logos.composio.dev/api/blocknative

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for Blocknative.
  - Setup:
    - Configure Api Key credentials for Blocknative.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

- Monitor transaction status for a given hash
- Fetch current Ethereum gas price distribution
- List all supported blockchains for monitoring
- Get real-time base fee predictions for next blocks

## 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.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK
```python
pip install composio_openai
```

```typescript
npm install @composio/openai
```

#### Path 1, Step 2: Initialize Composio and Create Tool Router Session

Import and initialize Composio client, then create a Tool Router session
```python
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
openai = OpenAI()
session = composio.create(user_id='your-user-id')
```

```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');
```

#### Path 1, Step 3: Execute Blocknative Tools via Tool Router with Your Agent

Get tools from Tool Router session and execute Blocknative actions with your Agent
```python
tools = session.tools
response = 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.'
  }]
)
result = composio.provider.handle_tool_calls(
  response=response,
  user_id='your-user-id'
)
print(result)
```

```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);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK and Claude Agent SDK
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
```

#### Path 2, Step 2: Create Tool Router Session

Initialize the Composio client and create a Tool Router session
```python
from composio import Composio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions

composio = Composio(api_key='your-composio-api-key')
session = composio.create(user_id='your-user-id')
url = session.mcp.url
```

```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}`);
```

#### Path 2, Step 3: Connect to AI Agent

Use the MCP server with your AI agent
```python
import asyncio

options = ClaudeAgentOptions(
    permission_mode='bypassPermissions',
    mcp_servers={
        'tool_router': {
            'type': 'http',
            'url': url,
            'headers': {
                'x-api-key': 'your-composio-api-key'
            }
        }
    },
    system_prompt='You are a helpful assistant with access to Blocknative tools.',
    max_turns=10
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query('Get gas price estimates for Ethereum mainnet')
        async for message in client.receive_response():
            if hasattr(message, 'content'):
                for block in message.content:
                    if hasattr(block, 'text'):
                        print(block.text)

asyncio.run(main())
```

```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}`);
```

## Why Use Composio?

### 1. 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

### 2. 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

### 3. 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

### 4. 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

## Use Blocknative with any AI Agent Framework

Choose a framework you want to connect 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)

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## Frequently Asked Questions

### Do I need my own developer credentials to use Blocknative with Composio?

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.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

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

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)