EVM MCP Server

#!/usr/bin/env node import { readFileSync, writeFileSync, existsSync, mkdirSync } from "fs"; import { join, dirname } from "path"; import { homedir } from "os"; import { fileURLToPath } from "url"; const CONFIG_FILE_NAME = "claude_desktop_config.json"; const CONFIG_DIR = join(homedir(), "Library", "Application Support", "Claude"); const CONFIG_PATH = join(CONFIG_DIR, CONFIG_FILE_NAME); // Get the package directory path (this script is in scripts/, so go up one level) const __filename = fileURLToPath(import.meta.url); const __dirname = dirname(__filename); const packageDir = dirname(__dirname); // Go up from scripts/ to package root // For local installations, use node with the build path const MCP_SERVER_CONFIG = { mcpServers: { "evm-mcp": { command: "node", args: [ join(packageDir, "build", "index.js") ], env: { // RPC_URL and CHAIN_ID will need to be set by user // Run 'npm run configure-claude' to set these automatically }, }, }, }; function createClaudeConfig() { try { console.log("🔧 Configuring Claude Desktop for evm-mcp..."); // Ensure config directory exists if (!existsSync(CONFIG_DIR)) { mkdirSync(CONFIG_DIR, { recursive: true }); console.log(`📁 Created Claude config directory: ${CONFIG_DIR}`); } let existingConfig = {}; // Read existing config if it exists if (existsSync(CONFIG_PATH)) { try { const configContent = readFileSync(CONFIG_PATH, "utf8"); existingConfig = JSON.parse(configContent); console.log("📖 Found existing Claude Desktop configuration"); } catch (error) { console.log("⚠️ Could not parse existing config, creating new one"); existingConfig = {}; } } // Merge with existing MCP servers const mergedConfig = { ...existingConfig, mcpServers: { ...existingConfig.mcpServers, ...MCP_SERVER_CONFIG.mcpServers, }, }; // Write the updated config writeFileSync(CONFIG_PATH, JSON.stringify(mergedConfig, null, 2)); console.log("✅ Successfully configured Claude Desktop!"); console.log(`📄 Config file: ${CONFIG_PATH}`); console.log( "🔄 Please restart Claude Desktop to use the evm-mcp server", ); console.log(""); console.log("⚠️ Note: You'll need to set RPC_URL and CHAIN_ID environment variables."); console.log(" Run 'npm run configure-claude' to configure these automatically,"); console.log(" or set them manually in Claude Desktop settings."); } catch (error) { console.error("❌ Error configuring Claude Desktop:", error.message); console.log(""); console.log("🔧 Manual configuration:"); console.log("1. Open Claude Desktop"); console.log("2. Go to Settings > Developer"); console.log("3. Add MCP server:"); console.log(" Name: evm-mcp"); console.log(" Command: node"); console.log(` Args: [\"${join(packageDir, "build", "index.js")}\"]`); console.log(" Environment Variables:"); console.log(" RPC_URL: https://mainnet.infura.io/v3/YOUR_API_KEY"); console.log(" CHAIN_ID: 1"); console.log("4. Restart Claude Desktop"); process.exit(1); } } // Only run if this is a postinstall script if (process.env.npm_lifecycle_event === "postinstall") { createClaudeConfig(); }