Peekaboo MCP

#!/usr/bin/env tsx import { Client } from '@modelcontextprotocol/sdk/client/index.js'; import { StdioClientTransport } from '@modelcontextprotocol/sdk/client/stdio.js'; /** * Test client that shows EXACTLY what the AI sees from the MCP server * This displays the raw MCP protocol responses in a human-readable format */ async function showMCPOutput() { console.log('='.repeat(80)); console.log('PEEKABOO MCP OUTPUT VIEWER - What the AI Actually Sees'); console.log('='.repeat(80)); console.log(); // Use the test-files directory as root to avoid issues const testRoot = process.cwd() + '/test-files'; const transport = new StdioClientTransport({ command: 'tsx', args: ['src/index.ts'], env: { ...process.env, PEEKABOO_ROOT: testRoot, PEEKABOO_RECURSIVE: 'true', PEEKABOO_MAX_DEPTH: '3' } }); const client = new Client({ name: 'mcp-output-viewer', version: '1.0.0' }, { capabilities: {} }); try { // Connect to server console.log('📡 Connecting to MCP server...'); await client.connect(transport); console.log('✅ Connected!\n'); // Note: Server info is exchanged during connection, not via a separate method console.log('🖥️ SERVER INFO is exchanged during initial connection'); console.log(); // List all resources console.log('📂 LISTING RESOURCES (what AI sees as available files):'); console.log('-'.repeat(80)); const resources = await client.listResources(); console.log(`Total resources found: ${resources.resources.length}`); console.log('\nRAW MCP RESPONSE:'); console.log(JSON.stringify(resources, null, 2)); console.log(); // Show categorized view console.log('📊 CATEGORIZED VIEW:'); const dirs = resources.resources.filter(r => r.mimeType === 'inode/directory'); const files = resources.resources.filter(r => r.mimeType !== 'inode/directory'); console.log(`\nDirectories (${dirs.length}):`); dirs.slice(0, 10).forEach(d => { console.log(` 📁 ${d.name} [${d.uri}]`); }); if (dirs.length > 10) console.log(` ... and ${dirs.length - 10} more`); console.log(`\nFiles (${files.length}):`); const filesByType = files.reduce((acc, f) => { const type = f.mimeType || 'unknown'; if (!acc[type]) acc[type] = []; acc[type].push(f); return acc; }, {} as Record<string, typeof files>); Object.entries(filesByType).forEach(([type, items]) => { console.log(`\n ${type} (${items.length} files):`); items.slice(0, 3).forEach(f => { console.log(` 📄 ${f.name}`); console.log(` URI: ${f.uri}`); }); if (items.length > 3) console.log(` ... and ${items.length - 3} more`); }); // Read a specific file console.log('\n' + '='.repeat(80)); console.log('📖 READING A FILE (what AI receives when reading):'); console.log('-'.repeat(80)); const packageJson = resources.resources.find(r => r.name === 'package.json'); if (packageJson) { console.log(`\nReading: ${packageJson.name}`); console.log(`URI: ${packageJson.uri}`); const content = await client.readResource({ uri: packageJson.uri }); console.log('\nRAW MCP READ RESPONSE:'); console.log(JSON.stringify(content, null, 2)); console.log('\n📝 EXTRACTED CONTENT:'); console.log('-'.repeat(40)); if (content.contents && content.contents[0]) { const text = content.contents[0].text; console.log(text.substring(0, 500)); if (text.length > 500) console.log('\n... (truncated for display)'); } } // Test error handling console.log('\n' + '='.repeat(80)); console.log('🚫 ERROR HANDLING (what AI sees on errors):'); console.log('-'.repeat(80)); try { await client.readResource({ uri: 'file:///etc/passwd' }); } catch (error) { console.log('\nAttempted to read: file:///etc/passwd'); console.log('Error response:'); console.log(JSON.stringify(error, null, 2)); console.log(`\nError message: ${error instanceof Error ? error.message : 'Unknown error'}`); } // Show protocol capabilities console.log('\n' + '='.repeat(80)); console.log('🔧 PROTOCOL CAPABILITIES:'); console.log('-'.repeat(80)); console.log('Client capabilities:', client.clientCapabilities); console.log('Server capabilities:', client.serverCapabilities); } catch (error) { console.error('\n❌ Fatal error:', error); } finally { console.log('\n' + '='.repeat(80)); console.log('Closing connection...'); await client.close(); process.exit(0); } } // Run the viewer showMCPOutput().catch(console.error);