{
  "ethereum": {
    "rpcUrl": "https://eth.llamarpc.com",
    "_note": "Free public endpoint, rate-limited. Swap in your own Infura/Alchemy URL for real use."
  },
  "solana": {
    "rpcUrl": "https://api.mainnet-beta.solana.com",
    "_note": "Free public endpoint, rate-limited. Swap in your own Helius/QuickNode URL for real use."
  },
  "bitcoin": {
    "apiBase": "https://blockstream.info/api",
    "_note": "Public block explorer API. Fine for balance checks; run your own node for anything serious."
  }
}