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Batch calls

The RPC service supports batch calls, in accordance with the JSON-RPC spec. Just pass an array of what you'd normally pass as the request body. You'll get an array of responses back.

Request​

curl --location 'https://free-rpc.nethermind.io/mainnet-juno' \
--header 'Content-Type: application/json' \
--data '[
    {
        "jsonrpc": "2.0",
        "method": "juno_version",
        "id": 0
    },
    {
        "jsonrpc": "2.0",
        "method": "starknet_specVersion",
        "params": [],
        "id": 1
    },
    {
        "jsonrpc": "2.0",
        "method": "starknet_chainId",
        "id": 2
    },
    {
        "jsonrpc": "2.0",
        "method": "starknet_blockNumber",
        "id": 3
    }
]'

Response​

[
   {
      "jsonrpc": "2.0",
      "result": "0.6.0",
      "id": 1
   },
   {
      "jsonrpc": "2.0",
      "result": "v0.9.3",
      "id": 0
   },
   {
      "jsonrpc": "2.0",
      "result": "0x534e5f4d41494e",
      "id": 2
   },
   {
      "jsonrpc": "2.0",
      "result": 519552,
      "id": 3
   }
]

Note that the results may not be in the same order as the method calls, so use the id field to associate the calls with the results.

Also note that this is NOT the same as Starknet's multicall feature, which allows you to interact with multiple contracts within one transaction.