Sei MCP Server

Enable LLM based tools to interact with and better understand Sei through natural language queries, using the Model Context Protocol

Supercharge your LLMs

Teach your LLMs how to do token transfers, smart contract interactions, read documentation, generate boilerplate code, and more.

Perfect For

Developers, Vibe Coders, DeFi users, NFT collectors, and anyone wanting to interact with Sei through natural language interfaces.

Quick Start

Basic Setup

Read-only mode - Perfect for blockchain queries, documentation lookup, and analysis without transaction capabilities.

Safe by Default: Wallet tools are disabled until you explicitly configure a private key.

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

What you can do:

• Query balances and transaction history
• Search Sei documentation
• Analyze blockchain data
• Generate boilerplate code
• Get network status and block info

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What is MCP?

The Model Context Protocol is an open standard that connects AI systems with custom prompts, tools and data sources (context). It enables things like:

• Real-time blockchain data access - Get current balances, transaction history, and network status directly from Sei
• Full execution and write operations - Deploy contracts, execute transactions, and interact with smart contracts (with wallet configured)
• Up-to-date documentation access - Search both main Sei docs and Sei-JS package documentation for comprehensive guidance
• Specialized blockchain capabilities - Access Sei-specific features like precompiles and native token operations
• Create boilerplate code - Generate code for Sei projects using the latest patterns

The Sei MCP Server leverages this protocol to bring all of this and more directly to your LLM enabled tools, allowing for natural language interactions with Sei.

Why Use Sei MCP Server?

Natural Language Blockchain Operations

Interact with Sei blockchain using conversational commands like “What’s my SEI balance?” or “Send 1 SEI to this address” instead of complex API calls.

AI-Powered Analysis

Get intelligent insights about transactions, contracts, and market data with built-in analysis capabilities powered by your AI assistant.

Multi-Platform Support

Works seamlessly with Cursor IDE, Windsurf, Claude Desktop, and custom applications through standardized MCP integration.

Comprehensive Toolkit

Access 29 blockchain tools covering token management, NFT operations, smart contract interactions, network monitoring, and documentation search.

Example Queries

"Get me the transactions in the latest block and tell me what they did."
"How do I query staking my delegations using Viem?"
"Generate a boilerplate dApp with Sei Global Wallet connection"
"What's my SEI balance?"
"Send 1 SEI to this address"

Next Steps

Complete Setup Guide

Follow our step-by-step installation guide for Claude Desktop, Cursor, Windsurf, and custom integrations.

Troubleshooting

Solutions to common setup and configuration issues