SVM-MCP: SOON Model Context Protocol Server

A Model Context Protocol (MCP) server that integrates Claude AI with SOON and other SVM-based blockchains. The server provides tools for checking balances, fetching recent transactions, and viewing token holdings on SOON's testnet and mainnet, for account balances, transactions, and token holdings.

Overview

This MCP server is designed to connect Claude with the SOON ecosystem, allowing it to:

Query wallet balances on testnet and mainnet
Fetch the most recent transactions for an address
Check token holdings for any account

The current implementation uses the SOON's RPC endpoints, but can be easily modified to work with any Solana-compatible blockchain or custom SVM implementation.

Features

Get Balances: Fetch native token balances for any address on SOON testnet or mainnet
Get Last Transaction: Retrieve the most recent transaction for an address
Get Token Accounts: List all token accounts owned by an address

Prerequisites

Node.js (v16+)
NPM or Bun package manager
Claude Desktop (for local testing)

Installation

Clone the repository:

git clone https://github.com/rkmonarch/svm-mcp
cd svm-mcp

Install dependencies:

npm install
# or
bun install

Build the project:

npm run build
# or
bun run build

Project Structure

The main server implementation is in src/index.ts:

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { Connection, PublicKey } from "@solana/web3.js";
import { z } from "zod";

const connectionTestnet = new Connection("https://rpc.testnet.soo.network/rpc");
const connectionMainnet = new Connection("https://rpc.mainnet.soo.network/rpc");

const server = new McpServer({
  name: "svm-mcp",
  version: "0.0.1",
  capabilities: [
    "get-soon-testnet-balance",
    "get-soon-testnet-last-transaction",
    "get-soon-testnet-account-tokens",
    "get-soon-mainnet-balance",
    "get-soon-mainnet-last-transaction",
    "get-soon-mainnet-account-tokens",
  ],
});

Tool Implementations

Get Balance

server.tool(
  "get-soon-testnet-balance",
  "Get the balance of a address on the Soon testnet",
  {
    address: z.string().describe("The Solana address to get the balance of"),
  },
  async ({ address }) => {
    try {
      const balance = await connectionTestnet.getBalance(new PublicKey(address));
      return {
        content: [
          {
            type: "text",
            text: `Balance: ${balance}`,
          },
        ],
      };
    } catch (error) {
      return {
        content: [
          {
            type: "text",
            text: `Error getting balance: ${error instanceof Error ? error.message : String(error)}`,
          },
        ],
      };
    }
  }
);

Get Last Transaction

server.tool(
  "get-soon-testnet-last-transaction",
  "Get the last transaction of an address on the Soon testnet",
  {
    address: z
      .string()
      .describe("The Solana address to get the last transaction for"),
  },
  async ({ address }) => {
    try {
      // Fetch the most recent transaction signatures for the address
      const signatures = await connectionTestnet.getSignaturesForAddress(
        new PublicKey(address),
        { limit: 1 } // Limit to just the most recent transaction
      );

      if (signatures.length === 0) {
        return {
          content: [
            {
              type: "text",
              text: "No transactions found for this address",
            },
          ],
        };
      }

      // Get the most recent transaction using its signature
      const latestSignature = signatures[0].signature;
      const transaction = await connectionTestnet.getConfirmedTransaction(
        latestSignature
      );

      return {
        content: [
          {
            type: "text",
            text: JSON.stringify(transaction),
          },
        ],
      };
    } catch (error) {
      return {
        content: [
          {
            type: "text",
            text: `Error getting transaction: ${error instanceof Error ? error.message : String(error)}`,
          },
        ],
      };
    }
  }
);

Get Token Accounts

server.tool(
  "get-soon-testnet-account-tokens",
  "Get the tokens of a address on the Soon testnet",
  {
    address: z.string().describe("The Solana address to get the tokens of"),
  },
  async ({ address }) => {
    try {
      const tokens = await connectionTestnet.getTokenAccountsByOwner(
        new PublicKey(address),
        {
          programId: new PublicKey("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"),
        }
      );
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify(tokens),
          },
        ],
      };
    } catch (error) {
      return {
        content: [
          {
            type: "text",
            text: `Error getting tokens: ${error instanceof Error ? error.message : String(error)}`,
          },
        ],
      };
    }
  }
);

Server Initialization

async function main() {
  try {
    console.error("Starting MCP server...");
    const transport = new StdioServerTransport();
    console.error("Transport initialized, connecting to server...");
    await server.connect(transport);
    console.error("Server connection established successfully");
    // The server will keep running in this state
  } catch (error) {
    console.error("There was an error connecting to the server:", error);
    process.exit(1);
  }
}

main().catch((err) => {
  console.error("There was an error starting the server:", err);
  process.exit(1);
});

Configuration

Claude Desktop Configuration

To use this MCP server with Claude Desktop, add the following to your claude_desktop_config.json file:

{
  "mcpServers": {
    "svm-mcp": {
      "command": "bun",
      "args": ["/path/to/svm-mcp/build/index.js"]
    }
  }
}

Customizing RPC Endpoints

To use different RPC endpoints or connect to a different Solana-compatible blockchain, edit the connection URLs in src/index.ts:

const connectionTestnet = new Connection("YOUR_TESTNET_RPC_URL");
const connectionMainnet = new Connection("YOUR_MAINNET_RPC_URL");

Usage with Claude

Once the MCP server is running and connected to Claude, you can use the following commands:

Checking an Address Balance

Can you check the balance of this SOON testnet address: <address>

Fetching Recent Transactions

What is the last transaction made by <address> on SOON testnet?

Retrieving Token Holdings

What tokens does <address> hold on SOON mainnet?

Acknowledgments

Anthropic Claude for the AI capabilities
Model Context Protocol for enabling tool integration
Solana Web3.js for blockchain interaction
SOON Network for the SVM implementation used in this example