01What is a Polygon zkEVM Cardona Testnet RPC?
An RPC endpoint connects wallets and applications to Polygon zkEVM Cardona Testnet. Use the endpoints above for JSON-RPC requests, and keep alternatives available for regional endpoint failures or rate limits.
02Add Polygon zkEVM Cardona Testnet to MetaMask
Use “Add to wallet” to request the network configuration. Always verify chain ID 2442, currency ETH, and the selected RPC before approving.
03Public RPC safety
Public endpoints are third-party infrastructure. They may log requests, enforce limits, or become unavailable. Never place private keys, seed phrases, or secrets in an RPC request.
04Common RPC errors
Rate limits, browser CORS rules, network mismatch, and temporary provider failures are common. Try another listed endpoint and verify the returned chain ID.