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

# `trace_callMany`

Performs multiple call-traces on top of the same block. You can analyze the interactions between different transactions and contracts. This method uses [300 credits](/services/get-started/pricing/) from your daily balance.

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

- `trace call parameters`: _[Required]_ Array of trace call parameters. Each trace call parameter itself is an array containing the following:  
  - `transaction call object`: _[Required]_ Transaction call object containing the same data as in the [trace_call](/services/reference/ethereum/json-rpc-methods/trace-methods/trace%5Fcall/#parameters) parameter.
  - `options`: _[Optional]_ An array of tracing options. Tracing options are [trace](/services/reference/ethereum/json-rpc-methods/trace-methods/#trace) and [stateDiff](/services/reference/ethereum/json-rpc-methods/trace-methods/#statediff). Specify both options or none.
- `block parameter`: _[Required]_ The hexadecimal block number, or the string `latest`, `earliest`, or `pending`. See the [default block parameter](https://ethereum.org/en/developers/docs/apis/json-rpc/#default-block). The block parameter is applied uniformly to all trace calls in the `trace call parameters` array.

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

- `result`: A trace object that includes the [trace](/services/reference/ethereum/json-rpc-methods/trace-methods/#trace) and [stateDiff](/services/reference/ethereum/json-rpc-methods/trace-methods/#statediff).

## 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://mainnet.infura.io/v3/<YOUR-API-KEY> \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "method": "trace_callMany", "params": [[[{"from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1", "to": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "value": "0x186a0"}, ["trace"]], [{"from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1", "to": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "value": "0x186a0"}, ["trace"]]], "latest"], "id": 1}

```

```
wscat -c wss://mainnet.infura.io/ws/v3/<YOUR-API-KEY> -x '{"jsonrpc": "2.0", "method": "trace_callMany", "params": [[[{"from":"0x407d73d8a49eeb85d32cf465507dd71d507100c1","to":"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "value": "0x186a0"}, ["trace"]], [{"from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1", "to": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "value": "0x186a0"}, ["trace"]]], "latest"], "id": 1}'

```

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

- JSON

```
{
  "jsonrpc": "2.0",
  "result": [
    {
      "output": "0x",
      "stateDiff": null,
      "trace": [
        {
          "action": {
            "callType": "call",
            "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
            "gas": "0x1dcd12f8",
            "input": "0x",
            "to": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b",
            "value": "0x186a0"
          },
          "result": {
            "gasUsed": "0x0",
            "output": "0x"
          },
          "subtraces": 0,
          "traceAddress": [],
          "type": "call"
        }
      ],
      "vmTrace": null
    },
    {
      "output": "0x",
      "stateDiff": null,
      "trace": [
        {
          "action": {
            "callType": "call",
            "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
            "gas": "0x1dcd12f8",
            "input": "0x",
            "to": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b",
            "value": "0x186a0"
          },
          "result": {
            "gasUsed": "0x0",
            "output": "0x"
          },
          "subtraces": 0,
          "traceAddress": [],
          "type": "call"
        }
      ],
      "vmTrace": null
    }
  ],
  "id": 1
}

```