.env.example

# Required Environment Variables

# OpenAI API Key (required for LangChain agents)
OPENAI_API_KEY=your_openai_api_key_here

# Ethereum Private Key (required for x402 payments)
# WARNING: Use testnet keys only! Never use mainnet keys in development
PRIVATE_KEY=your_ethereum_private_key_here

# Optional Configuration (has sensible defaults)

# x402 Facilitator URL (local development default)
FACILITATOR_URL=http://localhost:3000

# Blockchain Network (Base Sepolia testnet)
CHAIN_ID=84532

# Payment recipient address (test address - change for production)
PAY_TO_ADDRESS=0x742d35Cc6631C0532925a3b8D000cE3D

# Mock API Configuration
MOCK_API_PORT=3001

# Demo App Configuration
NEXT_PUBLIC_API_URL=http://localhost:3001
NEXT_PUBLIC_FACILITATOR_URL=http://localhost:3000

# Security Notes:
# 1. Never commit real private keys to version control
# 2. Use testnet funds only for development
# 3. Keep your .env file in .gitignore
# 4. For production, use proper key management systems