test-client.js

// Simple test client for the MCP server
import { spawn } from 'child_process';
import { fileURLToPath } from 'url';
import { dirname, join } from 'path';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

console.log('Starting Etherscan MCP Server test...\n');

// Start the server
const serverProcess = spawn('node', [join(__dirname, 'dist', 'index.js')], {
  env: {
    ...process.env,
    ETHERSCAN_API_KEY: 'YourApiKeyToken'
  }
});

let buffer = '';

serverProcess.stdout.on('data', (data) => {
  buffer += data.toString();

  // Try to parse complete JSON messages
  const lines = buffer.split('\n');
  buffer = lines.pop(); // Keep incomplete line in buffer

  for (const line of lines) {
    if (line.trim()) {
      try {
        const message = JSON.parse(line);
        console.log('Response:', JSON.stringify(message, null, 2));
      } catch (e) {
        console.log('Raw output:', line);
      }
    }
  }
});

serverProcess.stderr.on('data', (data) => {
  console.log('Server log:', data.toString().trim());
});

serverProcess.on('close', (code) => {
  console.log(`\nServer process exited with code ${code}`);
  process.exit(code);
});

// Wait for server to start
setTimeout(() => {
  console.log('\n=== Test 1: List Tools ===');
  const listToolsRequest = {
    jsonrpc: '2.0',
    id: 1,
    method: 'tools/list',
    params: {}
  };

  serverProcess.stdin.write(JSON.stringify(listToolsRequest) + '\n');

  // Wait a bit then send another test
  setTimeout(() => {
    console.log('\n=== Test 2: Get Gas Oracle (will fail with dummy API key) ===');
    const gasOracleRequest = {
      jsonrpc: '2.0',
      id: 2,
      method: 'tools/call',
      params: {
        name: 'etherscan_gas_oracle',
        arguments: {
          chainid: '1'
        }
      }
    };

    serverProcess.stdin.write(JSON.stringify(gasOracleRequest) + '\n');

    // Give time to process then exit
    setTimeout(() => {
      console.log('\n=== Tests complete, shutting down ===');
      serverProcess.kill();
    }, 2000);
  }, 2000);
}, 1000);

// Handle Ctrl+C
process.on('SIGINT', () => {
  console.log('\nShutting down...');
  serverProcess.kill();
  process.exit();
});