How to Use the Blocknative (Ethereum Mempool API) MCP in Claude

Q: How fast are the gas prices updated in the chat?

The getgasprices tool fetches data directly from Blocknative's mempool tracking infrastructure. You receive block-by-block updates reflecting the absolute latest gas requirements for Ethereum mainnet.

Get real-time Blocknative gas prices inside Claude Desktop to stop overpaying for Ethereum transactions.

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Connect Blocknative (Ethereum Mempool API) MCP to Claude Desktop

Create your Vinkius account to connect Blocknative (Ethereum Mempool API) to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Blocknative (Ethereum Mempool API) with Claude Desktop

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Get Live Gas Estimations in Claude Desktop

The `get_gas_prices` tool pulls real-time Ethereum gas prices directly into your Claude Desktop chat interface. Your agent reads the current base fee, priority fees, and confidence levels straight from Blocknative's mempool feed. Instead of switching to an external gas tracker, you ask Claude Desktop to check the current rates. The server returns live gwei numbers so you can decide when to execute your smart contracts.

Optimize Web3 Transaction Timing

The `get_gas_prices` tool feeds live Blocknative mempool data directly to this MCP server. By calling this endpoint, your agent analyzes whether the network congestion is spiking or cooling down. You get precise 99% confidence gas numbers right when you are drafting transaction payloads. This prevents your transactions from getting stuck in the public mempool during high-traffic mints.

Automate Gas Budgeting in Your Chat

The `get_gas_prices` tool connects this MCP server to your chat to monitor the Ethereum network. Claude Desktop checks the gas market and alerts you when the gwei price falls below your target. Your agent uses these live metrics to draft transactions with optimal max fee and max priority fee parameters. You save budget on every deployment without leaving your conversation window.

Setup guide

Set up Blocknative (Ethereum Mempool API) MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The Blocknative (Ethereum Mempool API) MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the Blocknative (Ethereum Mempool API) MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under blocknative-ethereum-mempool-api-mcp.

json

{
  "mcpServers": {
    "blocknative-ethereum-mempool-api-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Blocknative. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Blocknative (Ethereum Mempool API) MCP in Claude Desktop

You add the MCP server configuration to your local Claude Desktop JSON file. Once configured, Claude Desktop calls the `get_gas_prices` tool directly to fetch live gwei rates when you ask about Ethereum network congestion.

Yes, you can run this MCP server on both free and paid tiers of Claude Desktop. The `get_gas_prices` tool runs locally via stdio, meaning your desktop client communicates directly with the Blocknative endpoint.

Yes, you need a Blocknative API key configured in your Claude Desktop settings. This key authorizes the `get_gas_prices` tool to query their real-time mempool data feed.

The `get_gas_prices` tool fetches data directly from Blocknative's mempool tracking infrastructure. You receive block-by-block updates reflecting the absolute latest gas requirements for Ethereum mainnet.

This MCP server only transmits your gas estimation queries and Blocknative API key directly to the Blocknative API. Your local Ethereum transaction drafts and private wallet keys never leave your Claude Desktop environment.

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