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POST
/
efb0a5eccd2caa5135eb54eba6f7f300
eth_getCode
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_getCode",
  "id": 1,
  "params": [
    "0x350a791Bfc2C21F9Ed5d10980Dad2e2638ffa7f6",
    "latest"
  ]
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}

Documentation Index

Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt

Use this file to discover all available pages before exploring further.

Optimism API method eth_getCode retrieves the code stored at a specific address. This method is typically used to inspect the bytecode of smart contracts on the Optimism blockchain. This example retrieves the bytecode of the Chainlink token on the Optimism Mainnet.
When called against a block older than the latest ~128 blocks, this method is treated as an archive request (2 RUs instead of 1 RU). See request units.
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​
Parameters

  • address — the address to get the code from.
  • block — the block number (in hexadecimal) or one of the strings "earliest", "latest", or "pending", indicating the state to consider. The default is "latest".

​
Response

  • result — the code from the specified address, returned as a hexadecimal string.

​
Use case

The eth_getCode method is essential for:
  • Developers and auditors who need to verify the deployed bytecode of smart contracts.
  • DApps that interact with contracts dynamically based on their code.
  • Tools and services that monitor and analyze contract deployments and updates.

Body

application/json
​
jsonrpc
string
default:2.0
required
​
method
string
default:eth_getCode
required
​
id
integer
default:1
required
​
params
string[]
required

Response

200 - application/json

The code from the specified address

​
jsonrpc
string
​
id
integer
​
result
string
Last modified on May 18, 2026