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Sei MCP Server

Blockchain operations via Model Context Protocol

Sei MCP Server provides 27 blockchain tools accessible through the Model Context Protocol, enabling AI agents to interact with the Sei Network.

Overview​

  • URL: http://localhost:5004
  • Image: 0xn1c0/sei-mcp-server:latest
  • Purpose: Blockchain integration for AI agents
  • Status: Enabled by default

Features​

  • 27 Blockchain Tools: Wallet operations, DeFi, queries
  • Multi-Network Support: Sei mainnet and testnet
  • MCP Protocol: Standardized AI-blockchain communication
  • HTTP/SSE Transport: Real-time communication
  • Health Monitoring: Built-in health checks

Configuration​

Required​

SEI_PRIVATE_KEY=0xyour_private_key_here

Optional​

MCP_SERVER_PORT=5004
RPC_URL=https://evm-rpc.sei-apis.com

Available Tools​

Wallet Operations​

  • Get Balance: Check wallet balance
  • Send Transaction: Transfer tokens
  • Transaction History: Query past transactions
  • Address Validation: Verify addresses

DeFi Operations​

  • Token Swaps: Exchange tokens
  • Liquidity Provision: Add/remove liquidity
  • Staking: Stake/unstake tokens
  • Yield Farming: Manage farming positions

Smart Contracts​

  • Contract Calls: Execute contract functions
  • Contract Queries: Read contract state
  • Event Monitoring: Listen for contract events
  • Contract Deployment: Deploy new contracts

Network Queries​

  • Block Information: Latest block data
  • Gas Prices: Current gas estimates
  • Network Status: Chain health
  • Validator Information: Staking details

Usage​

Via n8n Workflows​

// HTTP Request node to MCP server
const response = await $http.request({
  method: 'POST',
  url: 'http://sei-mcp-server:5004/tools/get_balance',
  body: { address: 'sei1...' }
});

Via AI Agents​

MCP protocol enables direct tool access from:

  • ElizaOS agents
  • Cambrian agents
  • Custom AI implementations

Health Check​

# Check server health
curl http://localhost:5004/health

# List available tools
curl http://localhost:5004/tools

Troubleshooting​

Common Issues​

Server not responding:

# Check service logs
docker logs seiling-sei-mcp

# Verify private key
grep SEI_PRIVATE_KEY .env

Tool execution failures:

  • Verify private key format (0x...)
  • Check network connectivity
  • Ensure sufficient gas/tokens
  • Review RPC endpoint

Connection errors:

# Test health endpoint
curl http://localhost:5004/health

# Restart service
docker restart seiling-sei-mcp

Debugging​

# Detailed logs
docker logs seiling-sei-mcp --tail=100

# Check tool execution
curl -X POST http://localhost:5004/tools/get_balance \
  -H "Content-Type: application/json" \
  -d '{"address": "your_address"}'

Integration​

With AI Frameworks​

  • ElizaOS: Built-in MCP support
  • Cambrian: Direct tool access
  • Custom Agents: HTTP API calls

With Workflows​

  • n8n: HTTP request nodes
  • Zapier: Webhook integrations
  • Custom Scripts: REST API calls

Sei MCP Server enables AI agents to perform blockchain operations. Essential for DeFi automation and crypto workflows.