Can I build my own MCP server for a specific blockchain?
Category:Blockchain & Web3
Quick Answer
Yes — the MCP spec is open source with SDKs for TypeScript/Node.js and Python. You need a blockchain RPC endpoint, tool definitions, and an MCP SDK. Solana's official server is open source on GitHub, and web3-mcp supports multiple chains as a template.
Detailed Answer
What You Need
- MCP SDK — TypeScript/Node.js or Python
- Blockchain RPC endpoint — access to the chain's API
- Tool definitions — describe what operations your server supports
Getting Started
TypeScript Example Structure
import { McpServer } from "@modelcontextprotocol/sdk"; const server = new McpServer({ name: "my-blockchain-mcp" }); server.tool("getBalance", { address: "string" }, async (params) => { // Query blockchain RPC const balance = await rpcClient.getBalance(params.address); return { balance }; });
Reference Implementations
| Project | Language | Chains | Source |
|---|---|---|---|
| Solana MCP | TypeScript | Solana | github.com/sendaifun/solana-mcp |
| web3-mcp | TypeScript | ETH, Cardano, Solana | Strangelove Ventures |
| Community Solana | Various | Solana | 20+ repos on GitHub |
Tips
- Start with read-only tools (balance queries, price data)
- Add write operations (transactions) only after thorough testing
- Follow Solana's example — it's the most mature MCP ecosystem
- Jacob Creech (Solana Developers) recommends every serious project have a public MCP server
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