Somnia MCP Server

A comprehensive Model Context Protocol (MCP) server for interacting with the Somnia blockchain network. This server provides a wide range of tools for blockchain operations including token transfers, contract interactions, transaction monitoring, and more.

Features

• Blockchain Information: Get chain info, gas prices, fee data, and block information
• Token Operations: Native token (SST/SOMI) and ERC20 token transfers and balance queries
• NFT Support: ERC721 token information, ownership checking, and balance queries
• Contract Interactions: Read/write smart contracts, deploy contracts, estimate gas
• Transaction Management: Get transaction details, monitor confirmations, decode input data
• Batch Operations: Multi-transfer capabilities for both native and ERC20 tokens
• Contract Verification: Submit contracts for verification on blockchain explorers
• Analytics: Transaction volume analysis, top holders identification
• Multicall Support: Efficient batch contract calls using multicall3
• Network Support: Somnia Mainnet and Testnet

Installation

Prerequisites

• Bun runtime (v1.2.21 or later)
• Node.js (for TypeScript compilation)
• Private key for transaction operations (set as PRIVATE_KEY environment variable)

Install Dependencies

bun install

Environment Setup

Create a .env file in the root directory:

PRIVATE_KEY=your_private_key_here

⚠️ Security Warning: Never commit your private key to version control. Use environment variables or secure key management.

Usage

Development

bun run dev

Production

bun run start

Build

bun run build

Testing

bun test

Project Structure

src/
├── index.ts              # Main entry point, MCP server initialization
├── tools/
│   └── tools.ts          # MCP tool definitions and handlers
├── services/
│   └── services.ts       # Core blockchain interaction logic
├── lib/
│   └── lib.ts            # Viem client creation utilities
├── utils/
│   └── utils.ts          # Utility functions (JSON formatting)
└── constants/
    └── constants.ts      # Chain configurations, ABIs, network constants

Available Tools

Network & Chain Information

• get_chain_info - Get information about Somnia networks
• get_gas_price - Get current gas price
• get_fee_data - Get complete fee data including base fee
• get_block_number - Get block number by number or latest
• get_latest_block - Get the most recent block

Account & Balance Operations

• get_balance - Get SST/SOMI balance for an address
• get_erc20_balance - Get ERC20 token balance
• get_nft_balance - Get ERC721 token balance
• get_transaction_count - Get transaction count (nonce) for an address

Token Operations

• transfer_native_token - Transfer SST/SOMI tokens
• transfer_erc20_token - Transfer ERC20 tokens
• get_token_info - Get ERC20 token metadata
• batch_transfer_native - Transfer SST/SOMI to multiple addresses
• batch_transfer_erc20 - Transfer ERC20 tokens to multiple addresses

NFT Operations

• get_nft_info - Get ERC721 token information
• check_nft_ownership - Verify NFT ownership
• get_nft_balance - Get NFT balance for an address

Transaction Operations

• get_transaction - Get transaction details by hash
• get_transaction_receipt - Get transaction receipt
• get_address_transactions - Get transaction history for an address
• get_pending_transactions - Get pending transactions from mempool
• monitor_transaction - Monitor transaction until confirmed
• send_raw_transaction - Send signed raw transaction
• decode_transaction_input - Decode transaction input data
• get_transaction_fee - Calculate actual transaction fee

Contract Operations

• read_contract - Read from smart contracts (view/pure functions)
• write_contract - Write to smart contracts (state-changing functions)
• deploy_contract - Deploy new smart contracts
• simulate_contract_call - Simulate contract calls without execution
• estimate_gas - Estimate gas for transactions
• estimate_contract_gas - Estimate gas for contract function calls
• verify_contract - Submit contracts for verification
• get_contract_source - Get verified contract source code
• get_contract_bytecode - Get contract bytecode
• get_contract_abi - Get contract ABI
• get_contract_events - Get historical contract events

Advanced Operations

• multicall_contract - Execute multiple contract calls in one transaction
• multicall_contract_3 - Execute multiple calls with individual success status
• batch_write_contract - Execute multiple contract write operations
• get_transaction_volume - Calculate SST transaction volume for block range
• get_erc20_transaction_volume - Calculate ERC20 transaction volume
• get_top_holders - Get top SST/SOMI holders
• get_erc20_top_holders - Get top ERC20 token holders
• is_contract - Check if address is a smart contract

Network Support

Somnia Mainnet

• Chain ID: 5031
• Native Token: SOMI
• RPC: https://api.infra.mainnet.somnia.network
• Explorer: https://explorer.somnia.network

Somnia Testnet

• Chain ID: 50312
• Native Token: STT
• RPC: https://dream-rpc.somnia.network
• Explorer: https://shannon-explorer.somnia.network

Requirements

• Runtime: Bun v1.2.21+
• TypeScript: ^5.0.0
• Dependencies:
  • @modelcontextprotocol/sdk: ^1.17.5
  • viem: ^2.37.2
  • zod: ^3.24.1

Development

Code Style

• TypeScript with strict type checking
• ES modules
• Async/await patterns
• Error handling with try/catch blocks
• Zod for input validation

Architecture

The server follows a layered architecture:

1. Tools Layer (tools.ts): MCP tool definitions and request handling
2. Services Layer (services.ts): Business logic and blockchain interactions
3. Library Layer (lib.ts): Low-level client creation and utilities
4. Constants Layer (constants.ts): Configuration and contract ABIs

Adding New Tools

1. Define the tool in tools.ts using the MCP SDK
2. Implement the business logic in services.ts
3. Add any required constants or ABIs to constants.ts
4. Update this README with the new tool description

License

This project is licensed under the MIT License - see the LICENSE file for details.

MIT License

Copyright (c) 2025 Somnia MCP Project

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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This project was created using bun init in bun v1.2.21. Bun is a fast all-in-one JavaScript runtime.

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests if applicable
5. Submit a pull request

Disclaimer

This software is provided as-is. Always test thoroughly on testnet before mainnet deployment. Keep your private keys secure and never expose them in your code or logs.