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Documentation Links

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

Previousx402 Protocol Reference

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