TypeScript SDK

npm install @blockrun/llm
# or
pnpm add @blockrun/llm
# or
yarn add @blockrun/llm

import { LLMClient } from '@blockrun/llm';

const client = new LLMClient({
  privateKey: process.env.BLOCKRUN_WALLET_KEY as `0x${string}`
});

const response = await client.chat('openai/gpt-4o', 'Hello!');
console.log(response);

import { LLMClient } from '@blockrun/llm';

const client = new LLMClient({
  privateKey: '0x...',              // Required: wallet private key
  apiUrl: 'https://blockrun.ai/api', // Optional: API endpoint
  timeout: 60000                     // Optional: timeout in ms
});

const response = await client.chat('openai/gpt-4o', 'Explain quantum computing', {
  system: 'You are a physics teacher.',  // Optional
  maxTokens: 500,                         // Optional
  temperature: 0.7                        // Optional
});

import { LLMClient, type ChatMessage } from '@blockrun/llm';

const messages: ChatMessage[] = [
  { role: 'system', content: 'You are helpful.' },
  { role: 'user', content: 'What is 2+2?' }
];

const result = await client.chatCompletion('openai/gpt-4o', messages, {
  maxTokens: 100,
  temperature: 0.7,
  topP: 0.9
});

console.log(result.choices[0].message.content);
console.log(`Tokens used: ${result.usage?.total_tokens}`);

const models = await client.listModels();
for (const model of models) {
  console.log(`${model.id}: $${model.inputPrice}/M`);
}

const address = client.getWalletAddress();
console.log(`Paying from: ${address}`);

import { testnetClient } from '@blockrun/llm';

// Create testnet client (uses Base Sepolia)
const client = testnetClient({ privateKey: '0x...' });

// Chat with testnet model
const response = await client.chat('openai/gpt-oss-20b', 'Hello!');
console.log(response);

// Verify you're on testnet
console.log(client.isTestnet()); // true

import { LLMClient } from '@blockrun/llm';

// Configure manually with testnet API URL
const client = new LLMClient({
  privateKey: '0x...',
  apiUrl: 'https://testnet.blockrun.ai/api'
});
const response = await client.chat('openai/gpt-oss-20b', 'Hello!');

import { LLMClient, APIError, PaymentError } from '@blockrun/llm';

const client = new LLMClient({ privateKey: '0x...' });

try {
  const response = await client.chat('openai/gpt-4o', 'Hello!');
} catch (error) {
  if (error instanceof PaymentError) {
    console.error('Payment failed:', error.message);
    // Check your USDC balance
  } else if (error instanceof APIError) {
    console.error(`API error (${error.statusCode}):`, error.message);
  } else {
    throw error;
  }
}

interface ChatMessage {
  role: 'system' | 'user' | 'assistant';
  content: string;
}

interface ChatResponse {
  id: string;
  object: string;
  created: number;
  model: string;
  choices: ChatChoice[];
  usage?: ChatUsage;
}

interface ChatChoice {
  index: number;
  message: ChatMessage;
  finish_reason?: string;
}

interface ChatUsage {
  prompt_tokens: number;
  completion_tokens: number;
  total_tokens: number;
}

interface Model {
  id: string;
  name: string;
  provider: string;
  inputPrice: number;
  outputPrice: number;
  contextWindow: number;
  maxOutput: number;
  available: boolean;
}

import { LLMClient } from '@blockrun/llm';

const client = new LLMClient({ privateKey: '0x...' });

const [gpt, claude, gemini] = await Promise.all([
  client.chat('openai/gpt-4o', 'What is 2+2?'),
  client.chat('anthropic/claude-sonnet-4', 'What is 3+3?'),
  client.chat('google/gemini-2.5-flash', 'What is 4+4?')
]);

console.log('GPT:', gpt);
console.log('Claude:', claude);
console.log('Gemini:', gemini);

// Streaming support is planned for a future release

import express from 'express';
import { LLMClient } from '@blockrun/llm';

const app = express();
const client = new LLMClient({ privateKey: process.env.BLOCKRUN_WALLET_KEY });

app.post('/chat', async (req, res) => {
  try {
    const { message } = req.body;
    const response = await client.chat('openai/gpt-4o', message);
    res.json({ response });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

// app/api/chat/route.ts
import { NextRequest, NextResponse } from 'next/server';
import { LLMClient } from '@blockrun/llm';

const client = new LLMClient({
  privateKey: process.env.BLOCKRUN_WALLET_KEY as `0x${string}`
});

export async function POST(request: NextRequest) {
  const { message } = await request.json();
  const response = await client.chat('openai/gpt-4o', message);
  return NextResponse.json({ response });
}

npm test                          # Run all tests in watch mode
npm test run                      # Run tests once
npm test -- --coverage            # Run with coverage report

# Set your funded wallet key
export BLOCKRUN_WALLET_KEY=0x...

# Run only integration tests
npm test -- test/integration

# Run all tests including integration
npm test run

# .env (add to .gitignore!)
BLOCKRUN_WALLET_KEY=0x...your_private_key_here

// app.ts
import { LLMClient } from '@blockrun/llm';
import dotenv from 'dotenv';

dotenv.config();

if (!process.env.BLOCKRUN_WALLET_KEY) {
  throw new Error('BLOCKRUN_WALLET_KEY not set');
}

const client = new LLMClient({
  privateKey: process.env.BLOCKRUN_WALLET_KEY as `0x${string}`
});

try {
  await client.chat('invalid-model', 'Hello');
} catch (error) {
  // Error messages only contain safe, user-facing information
  // No internal stack traces, file paths, or sensitive data
  console.error(error.message);
}

const address = client.getWalletAddress();
console.log(`View transactions: https://basescan.org/address/${address}`);

npm update @blockrun/llm