Private AI Chat.
Pay Per Message.

Generate API Key

Create API keys to access Chat402 from your applications. Each key is linked to your wallet and charges via delegation.

🔑 Your API Keys

View and manage all your API keys. Revoke keys that may have been compromised.

📡 API Endpoint

Quick Start - Test Your API Key

Run this command to test your API key and make your first AI request

curl -X POST https://api.chat402.xyz/api/v1/prompt \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY_HERE" \
  -d '{
    "model": "gpt-3.5-turbo",
    "prompt": "Say hello in 3 words",
    "maxTokens": 20
  }'

{
  "success": true,
  "data": {
    "model": "gpt-3.5-turbo",
    "text": "Hi there friend",
    "cost": {
      "totalCost": 0.00002
    },
    "transactionHash": "..."
  }
}

Chat402 Documentation

The first LLM API gateway built for x402. Pay-per-prompt in USDC on Solana.

Access GPT-4, Claude, Gemini, Grok, DeepSeek and more. No subscriptions, just pay for what you use.

🚀 Quick Start

Get up and running in 3 steps:

Example cURL Request

curl -X POST https://api.chat402.xyz/api/v1/prompt \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-3.5-turbo",
    "prompt": "Explain blockchain in simple terms"
  }'

Example JavaScript

const response = await fetch('https://api.chat402.xyz/api/v1/prompt', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gpt-4o',
    prompt: 'Write a haiku about AI'
  })
});

const data = await response.json();
console.log(data.text);

🤖 Supported Models

Access premium AI models through one unified API:

💰 Payment Networks

Pay with USDC on your preferred network:

Additional Resources

Access GPT-4, Claude, Grok and more. Get real-time token data, whale alerts, holder analysis, and trading insights - all from Telegram.

🚀 Quick Start

Get started in 3 easy steps:

💰 Account & Wallet

🤖 AI Chat

📊 Quick Price & Charts

🔍 Token Analysis

👥 Holder Intelligence

🎰 Pump.fun

👛 Wallet Analysis

🧠 Smart Money

🐋 Whale Alerts

⭐ Watchlist & Alerts

🛠️ Utilities

👥 Group Features

Add @Chat402Bot to your Telegram group for shared AI access:

🎲 Fun

💡 Pro Tips

• Just type any message to chat with AI - no command needed
• Use /model to switch between GPT-4, Claude, Grok, and more
• Token lookups work with symbols, names, or contract addresses
• Set price alerts to get notified of major moves: /alert sol 200
• Use /synth for complex questions - it queries multiple AIs
• Share images with the bot for AI vision analysis
• Forward messages to the bot to summarize or translate them

💵 Pricing

Pay only for what you use. No subscriptions.

No API keys required. Your agent pays directly with USDC for each request. Access GPT-4, Claude, Grok, market data, and blockchain intelligence - all through one API.

⚡ Why Chat402 for Agents?

🚀 Quick Start

Get your agent making requests in minutes:

💳 Payment Methods

🧠 LLM Endpoints (Paid)

📊 Market Data Endpoints (Free)

🔗 Blockchain Intelligence (Free)

💻 TypeScript Example

async function callChat402(prompt: string, model = 'gpt-4o-mini') {
  const API = 'https://api.chat402.xyz/api/v1';

  // Step 1: Initial request returns 402
  const res = await fetch(`${API}/prompt`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-Wallet-Address': AGENT_WALLET.publicKey.toString()
    },
    body: JSON.stringify({ prompt, model })
  });

  if (res.status !== 402) return res.json();

  // Step 2: Parse payment requirements
  const { accepts } = await res.json();
  const { maxAmountRequired, payTo } = accepts[0];

  // Step 3: Build & sign USDC transfer
  const tx = await buildUsdcTransfer(AGENT_WALLET, payTo, maxAmountRequired);
  tx.sign(AGENT_WALLET);

  // Step 4: Create x402 payment header
  const payment = Buffer.from(JSON.stringify({
    network: 'solana',
    payload: { transaction: tx.serialize().toString('base64') }
  })).toString('base64');

  // Step 5: Retry with payment
  return fetch(`${API}/prompt`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-Payment': payment,
      'X-Wallet-Address': AGENT_WALLET.publicKey.toString()
    },
    body: JSON.stringify({ prompt, model })
  }).then(r => r.json());
}

🎯 Agent Use Cases

⚙️ Rate Limits

📚 Resources