> For the complete documentation index, see [llms.txt](/llms.txt).

# `eth_callMany`

Executes a list of transaction bundles without creating transactions on the blockchain. This is useful for simulating transactions and reviewing outcomes before submitting them. This method uses [80 credits](/services/get-started/pricing/) from your daily balance.

## Parameters[​](#parameters "Direct link to Parameters")

- `bundles`: [_Required_] Array of bundles to simulate. Each bundle includes:  
  - `transactions`: Array of call objects using the same fields as `eth_call`.
  - `blockOverride`: [_Optional_] Block header overrides (for example, block number, hash, coinbase, timestamp, difficulty, gas limit, base fee).
- `simulationContext`: [_Required_] Object describing where to simulate:  
  - `blockNumber`: Block number (hex quantity) or a tag (`latest`, `pending`, `safe`, `finalized`, `earliest`), or a block hash.
  - `transactionIndex`: Index within the block to simulate against.
- `stateOverrides`: [_Optional_] Object mapping addresses to overrides (`balance`, `nonce`, `code`, `state`, `stateDiff`).
- `timeout`: [_Optional_] Max simulation time in milliseconds. Defaults to 5000.

## Returns[​](#returns "Direct link to Returns")

A list of bundles. Each bundle returns an array with one result per transaction. Each result contains either:

- `value`: The return value when the call succeeds.
- `error`: An error object when the call reverts, including `code`, `message`, and optional `data`.

## Example[​](#example "Direct link to Example")

Replace `<YOUR-API-KEY>` with an API key from your [Infura dashboard](https://app.infura.io/).

### Request[​](#request "Direct link to Request")

- curl
- WSS

```
curl https://megaeth-mainnet.infura.io/v3/<YOUR-API-KEY> \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc":"2.0",
    "id":1,
    "method":"eth_callMany",
    "params":[
      [
        {
          "transactions":[
            {
              "to":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
              "data":"0x70a08231000000000000000000000000bc0e63965946815d105e7591407704e6e1964e59"
            },
            {
              "to":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
              "data":"0x313ce567"
            }
          ]
        }
      ],
      {
        "blockNumber":"latest"
      }
    ]
  }'

```

```
wscat -c wss://megaeth-mainnet.infura.io/ws/v3/<YOUR-API-KEY> -x '{"jsonrpc":"2.0","id":1,"method":"eth_callMany","params":[[{"transactions":[{"to":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","data":"0x70a08231000000000000000000000000bc0e63965946815d105e7591407704e6e1964e59"},{"to":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","data":"0x313ce567"}]}],{"blockNumber":"latest"}]}'

```

### Response[​](#response "Direct link to Response")

- JSON

```
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": [
    [
      {
        "value": "0x"
      }
    ]
  ]
}

```