Dexto Client SDK

An ultra-lightweight, zero-dependency HTTP client SDK for the Dexto API.

Features

• 🚀 Ultra-lightweight: Only 80KB bundle size
• 🔌 Zero dependencies: No external libraries
• 🌐 Universal: Works in Node.js, browsers, and React Native
• 📡 HTTP + SSE: Full REST API and real-time SSE streaming support
• 🛡️ TypeScript: Full type safety
• 🔄 Auto-retry: Built-in retry logic with exponential backoff
• ⚡ Fast: Server-side validation, client-side pass-through

Installation

npm install @dexto/client-sdk

Quick Start

import { DextoClient } from '@dexto/client-sdk';

const client = new DextoClient({
  baseUrl: 'https://your-dexto-server.com',
  apiKey: 'optional-api-key'
});

// Connect to Dexto server
await client.connect();

// Send a message
const response = await client.sendMessage({
  content: 'Hello, how can you help me?'
});

console.log(response.response);

Configuration

const client = new DextoClient({
  baseUrl: 'https://your-dexto-server.com',  // Required: Dexto API base URL
  apiKey: 'your-api-key',                   // Optional: API key for auth
  timeout: 30000,                           // Optional: Request timeout (ms)
  retries: 3,                              // Optional: Retry attempts
}, {
  reconnect: true,                         // Optional: Auto-reconnect
  reconnectInterval: 5000,                 // Optional: Reconnect delay (ms)
  debug: false                             // Optional: Debug logging
});

API Methods

Connection Management

• connect() - Establish connection to Dexto server
• disconnect() - Close connection
• isConnected - Check connection status

Messaging

• sendMessage(input) - Send message (HTTP)
• SSE streaming available via /api/message-stream endpoint

Session Management

• listSessions() - List all sessions
• createSession(id?) - Create new session
• getSession(id) - Get session details
• deleteSession(id) - Delete session

Real-time Events

• on(eventType, handler) - Subscribe to Dexto events
• onConnectionState(handler) - Connection state changes

Error Handling

try {
  await client.sendMessage({ content: 'Hello' });
} catch (error) {
  if (error.name === 'ConnectionError') {
    console.log('Failed to connect to Dexto server');
  } else if (error.name === 'HttpError') {
    console.log(`HTTP ${error.status}: ${error.statusText}`);
  }
}

Philosophy

This SDK follows the thin client philosophy:

• ✅ Pass-through: Data goes directly to Dexto server
• ✅ Server validation: Let the Dexto server handle all validation
• ✅ Simple errors: Return server errors as-is
• ✅ Type safety: Full TypeScript support
• ✅ Fast: Minimal client-side processing

Bundle Size

• Total: ~80KB
• Main bundle: ~25KB
• Type definitions: ~10KB
• Zero external dependencies