mcp-server.js

#!/usr/bin/env node

import { Server } from '@modelcontextprotocol/sdk/server';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import {
  CallToolRequestSchema,
  ListToolsRequestSchema,
} from '@modelcontextprotocol/sdk/types.js';
import { createRequire } from 'node:module';
import { initializeDataOnStartup, startRpcHealthCheck } from './dataService.js';
import { getToolDefinitions, handleToolCall } from './mcp-tools.js';

const require = createRequire(import.meta.url);
const { version } = require('./package.json');

// Load data on startup
await initializeDataOnStartup({
  onBackgroundRefreshSuccess: () => {
    startRpcHealthCheck();
  }
});
startRpcHealthCheck();

// Create MCP server instance
const server = new Server(
  {
    name: 'chains-api',
    version,
  },
  {
    capabilities: {
      tools: {},
    },
  }
);

// Define available tools
server.setRequestHandler(ListToolsRequestSchema, async () => ({
  tools: getToolDefinitions(),
}));

// Handle tool calls
server.setRequestHandler(CallToolRequestSchema, async (request) => {
  const { name, arguments: args } = request.params;
  return handleToolCall(name, args);
});

// Start the server
async function main() {
  const transport = new StdioServerTransport();
  await server.connect(transport);
  console.error('Chains API MCP server running on stdio');
}

try {
  await main();
} catch (error) {
  console.error('Server error:', error);
  process.exit(1);
}