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

Q: How do I configure the Blocknative (Ethereum Mempool API) in Cursor?

You add the MCP server to your project's .cursor/mcp.json file. Once saved, the Cursor agent can run the getgasprices tool during chat and inline editing sessions.

Q: What network does this server fetch gas prices for?

The getgasprices tool queries the Ethereum mainnet mempool. It fetches the standard gas estimations, priority fees, and base fees calculated by Blocknative's global node network.

Inject real-time Blocknative gas prices straight into your Cursor agent to build optimized Ethereum transaction scripts.

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Connect Blocknative (Ethereum Mempool API) MCP to Cursor

Create your Vinkius account to connect Blocknative (Ethereum Mempool API) to Cursor 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 Cursor

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Generate Gas-Aware Smart Contract Deployments in Cursor

The `get_gas_prices` tool feeds active Ethereum mempool metrics directly to this MCP server. Your editor reads current base and priority fees to write deployment scripts that don't stall. When you write Hardhat or Foundry scripts, Cursor uses the live gwei numbers to pre-fill gas overrides. You get accurate, real-world numbers instead of hardcoded placeholders.

Debug Transaction Failures with Live Mempool Data

The `get_gas_prices` tool diagnoses why your transaction is stuck or reverted. The MCP server pulls Blocknative's real-time confidence tiers directly into your terminal sidebar. Cursor compares your failed transaction's gas parameters against these live mempool metrics. It immediately highlights if your max priority fee was too low for current block inclusion.

Build Dynamic Gas Estimators

The `get_gas_prices` tool lets you write and test front-end gas widgets inside Cursor. Your agent calls the server to fetch actual payload sizes and gas costs. You build UI components that reflect real-time network conditions. This guarantees your application's users see the same pricing that Blocknative's mempool engine expects.

Setup guide

Set up Blocknative (Ethereum Mempool API) MCP in Cursor

Prerequisites

Cursor installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP Settings

Go to Cursor Settings → MCP or open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for "MCP: Add Server".
2

Add the Blocknative (Ethereum Mempool API) MCP

Cursor will create or open .cursor/mcp.json in your project root. Paste the JSON snippet on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Enable Agent mode

Open Composer (Cmd+I / Ctrl+I) and switch to Agent mode using the dropdown at the top. MCP tools are only available in Agent mode.
4

Verify the connection

Ask Cursor something like "List my recent Blocknative (Ethereum Mempool API) transactions." If the MCP tools are loaded correctly, Cursor will call the Blocknative (Ethereum Mempool API) tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

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

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Common questions about Blocknative (Ethereum Mempool API) MCP in Cursor

You add the MCP server to your project's `.cursor/mcp.json` file. Once saved, the Cursor agent can run the `get_gas_prices` tool during chat and inline editing sessions.

No, this MCP server runs asynchronously in a lightweight background process. The `get_gas_prices` tool only queries Blocknative's API when your agent explicitly requests current gas rates.

Cursor generates the transaction code and gas parameters using the `get_gas_prices` tool, but it cannot sign or execute transactions. You retain full control over signing and broadcasting the transactions.

The `get_gas_prices` tool queries the Ethereum mainnet mempool. It fetches the standard gas estimations, priority fees, and base fees calculated by Blocknative's global node network.

This MCP server only passes your gas query parameters and API credentials to Blocknative over encrypted HTTPS. Your local smart contract source code and private keys are never sent to the API.

Use it with your favorite AI tools

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