alchemy_simulateAssetChangesBundle

POST

/{apiKey}

CUs4500

Deprecation notice

This endpoint will be deprecated on September 30th 2026.

Simulates multiple transactions sequentially and returns a combined list of asset changes.

Path Parameters

stringrequireddefaults to docs-demo

For higher throughput, create your own API key

Request

object[]required

An array of 1–2 transaction objects to run in sequence.

Responses

200

The asset changes resulting from the sequential simulation.

POST/v2/{apiKey}

curl --request POST \  --url https://eth-mainnet.g.alchemy.com/v2/docs-demo \  --header 'Content-Type: application/json' \  --data '{  "jsonrpc": "2.0",  "id": 1,  "method": "alchemy_simulateAssetChangesBundle",  "params": [    [      {        "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",        "to": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",        "data": "0xa9059cbb000000000000000000000000fc43f5f9dd45258b3aff31bdbe6561d97e8b71de00000000000000000000000000000000000000000000000000000000000f4240"      },      {        "from": "0x1234567890abcdef1234567890abcdef12345678",        "to": "0xfc43f5f9dd45258b3aff31bdbe6561d97e8b71de",        "data": "0x00abcdef"      }    ]  ]}'

200Success

{  "jsonrpc": "2.0",  "id": 1,  "result": {    "changes": [      {        "assetType": "ERC20",        "changeType": "TRANSFER",        "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",        "to": "0xfc43f5f9dd45258b3aff31bdbe6561d97e8b71de",        "rawAmount": "1000000",        "contractAddress": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",        "tokenId": null,        "decimals": 6,        "symbol": "USDC",        "name": "USDC",        "logo": "https://static.alchemyapi.io/images/assets/3408.png",        "amount": "1"      }    ],    "gasUsed": "0xb05c",    "error": null  }}

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