Support & Resources

Documentation Links

• x402 Protocol

• EIP-712 Typed Data

• Base Network

Network Information

• Base Mainnet: Chain ID 8453

• Base Sepolia: Chain ID 84532

• USDC Mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

• USDC Sepolia: 0x036CbD53842c5426634e7929541eC2318f3dCF7e

Common Issues

Payment Issues

• Insufficient USDC: Ensure wallet has enough USDC for payment

• Wrong Network: Verify you're on the correct network (mainnet vs testnet)

• Expired Transaction: Transactions expire after a few minutes, retry if needed

PayGate Issues

• Target URL Not Working: Verify your target URL is accessible and returns proper responses

• Rate Limiting: Implement proper error handling for 429 responses

Authentication Issues

• Message Signing: Ensure you're signing the exact message provided by the API endpoint

• Token Expiration: Access tokens expire after 1 hour, use refresh tokens to get new ones

• Signature Format: Verify your EIP-712 signature implementation matches the expected format