curl --request GET \
  --url https://app.magna.so/api/external/v1/chains \
  --header 'x-magna-api-token: <api-key>'

{
  "isProcessed": true,
  "result": {
    "items": [
      {
        "id": "ch1...uuid",
        "name": "Ethereum",
        "platform": "EVM"
      },
      {
        "id": "ch2...uuid",
        "name": "Solana",
        "platform": "SOLANA"
      }
    ]
  }
}