Setup & Installation

Open Settings

Navigate to Cursor → Settings → Cursor Settings → MCP

Cursor → Settings → Cursor Settings → MCP

Configure Server

Click “Add new Global MCP server” and add this configuration to mcp.json:

{
  "mcpServers": {
    "sei-mcp-server": {
      "command": "npx",
      "args": ["-y", "@sei-js/mcp-server"],
      "env": {
        "PRIVATE_KEY": "your_private_key_here"
      }
    }
  }
}

Restart

Restart Cursor to activate the MCP server. You’ll see a notification when it’s ready.

Open Settings

Navigate to Cursor → Settings → Cursor Settings → MCP

Cursor → Settings → Cursor Settings → MCP

Configure Server

Click “Add new Global MCP server” and add this configuration to mcp.json:

{
  "mcpServers": {
    "sei-mcp-server": {
      "command": "npx",
      "args": ["-y", "@sei-js/mcp-server"],
      "env": {
        "PRIVATE_KEY": "your_private_key_here"
      }
    }
  }
}

Restart

Restart Cursor to activate the MCP server. You’ll see a notification when it’s ready.

Open Settings

Navigate to Windsurf → Settings → Windsurf Settings → Cascade

Windsurf → Settings → Windsurf Settings → Cascade

Add Configuration

Add the Sei MCP Server to your configuration:

{
  "mcpServers": {
    "sei": {
      "command": "npx",
      "args": ["-y", "@sei-js/mcp-server"],
      "env": {
        "PRIVATE_KEY": "your_private_key_here"
      }
    }
  }
}

Activate

Save and restart Windsurf. The server loads automatically.

Install Claude

Download Claude Desktop from Anthropic.

Edit Configuration

Open Settings → Developer → Edit Config and add:

{
  "mcpServers": {
    "sei": {
      "command": "npx",
      "args": ["-y", "@sei-js/mcp-server"],
      "env": {
        "PRIVATE_KEY": "your_private_key_here"
      }
    }
  }
}

Restart

Save and restart Claude Desktop to enable Sei tools.

Install CLI

npm install -g @anthropic-ai/claude-code

Add Server

claude mcp add sei-mcp-server npx @sei-js/mcp-server

Start Session

claude

The Sei MCP Server activates automatically in your session.

Private Key Setup

Use a dedicated test wallet with minimal funds. Never use your main wallet’s private key.

Export your private key from your wallet:

Access Wallet Settings

Look for “Export Private Key” or “Show Private Key” in wallet settings

Verify Format

Ensure the key starts with 0x

Fund Wallet

Fund the wallet with small amounts for testing

Getting Started

Implementation

Private Key Setup

Getting Started

Implementation

​Private Key Setup

Private Key Setup