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JavaScript SDK

Use the official Lexa JavaScript SDK to integrate Lexa AI into your applications with a familiar OpenAI-style API.

Install from NPM

Get the latest version: npm install @robilabs/lexa@latest

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Quick Start

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Installation

npm install @robilabs/lexa@latest

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Basic Usage

import Lexa from '@robilabs/lexa';

const lexa = new Lexa('your-api-key');

const completion = await lexa.chat({
  messages: [
    { role: 'user', content: 'Hello! How are you?' }
  ],
  model: 'lexa-mml',
  temperature: 0.7,
  max_tokens: 100
});

console.log(completion.choices[0].message.content);

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Features

  • OpenAI-style API - Familiar interface, easy migration
  • Real Lexa Models - Access to lexa-mml, lexa-x1, lexa-rho
  • TypeScript Support - Full type definitions included
  • Streaming Support - Real-time text generation
  • Multimodal Capabilities - Vision and text processing
  • Simple Setup - Just install and start using

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Available Models

The SDK provides access to the following Lexa models:

lexa-mml

Multimodal model with vision capabilities (8192 context window)

lexa-x1

Fast, lightweight text-based model (4096 context window)

lexa-rho

Reasoning model with enhanced capabilities (16384 context window)

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Usage Examples

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Basic Chat Completion

import Lexa from '@robilabs/lexa';

const lexa = new Lexa('your-api-key');

const completion = await lexa.chat({
  messages: [
    { role: 'user', content: 'Hello! Can you tell me a joke?' }
  ],
  model: 'lexa-mml',
  temperature: 0.7,
  max_tokens: 100
});

console.log(completion.choices[0].message.content);

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Conversation with System Message

const completion = await lexa.chat({
  messages: [
    { 
      role: 'system', 
      content: 'You are a helpful assistant that speaks like a pirate.' 
    },
    { 
      role: 'user', 
      content: 'What is the weather like today?' 
    }
  ],
  model: 'lexa-x1',
  temperature: 0.9
});

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Streaming Response

const completion = await lexa.chat({
  messages: [
    { role: 'user', content: 'Write a short story.' }
  ],
  model: 'lexa-rho',
  stream: true
});

// Handle streaming response
for await (const chunk of completion.stream) {
  console.log(chunk);
}

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List Available Models

const models = await lexa.models();
console.log(models.data);
// Output: [
//   { id: 'lexa-mml', object: 'model', owned_by: 'lexa' },
//   { id: 'lexa-x1', object: 'model', owned_by: 'lexa' },
//   { id: 'lexa-rho', object: 'model', owned_by: 'lexa' }
// ]

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API Reference

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Constructor

const lexa = new Lexa(apiKey, config);
Parameters:
  • apiKey (string): Your Lexa API key
  • config (object, optional): Configuration options

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Chat Completion

const completion = await lexa.chat(options);
Options:
  • messages (array): Array of message objects
  • model (string): Model to use (default: ‘lexa-mml’)
  • temperature (number, optional): Controls randomness (0-2)
  • max_tokens (number, optional): Maximum tokens to generate
  • stream (boolean, optional): Enable streaming response

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List Models

const models = await lexa.models();
Returns available models with their metadata.

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Migration from OpenAI

If you’re currently using OpenAI’s SDK, migrating to Lexa is straightforward: 
import OpenAI from 'openai';
const openai = new OpenAI({ apiKey: 'your-key' });

const completion = await openai.chat.completions.create({
  messages: [{ role: 'user', content: 'Hello!' }],
  model: 'gpt-3.5-turbo'
});

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Installation Options

npm install @robilabs/lexa@latest

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Get Your API Key

1

Visit Lexa Chat

Go to https://www.lexa.chat
2

Sign up or log in

Create an account or sign in to your existing account
3

Navigate to Account settings

Click your avatar → Settings → Account tab
4

Generate API key

Find “API Keys” and click “Show” to view your key
5

Use in your application

Copy the key and use it in your Lexa SDK initialization

NPM Package

View on npm registry

GitHub Repository

Source code and issues

Lexa Chat

Try Lexa online

Community

Join our community

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Support

Reference: @robilabs/lexa on npm