POST
/
v2
/
evm
/
smart-accounts
/
{address}
/
user-operations
Prepare a user operation
curl --request POST \
  --url https://api.cdp.coinbase.com/platform/v2/evm/smart-accounts/{address}/user-operations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "network": "base-sepolia",
  "calls": [
    {
      "to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      "value": "0",
      "data": "0xa9059cbb000000000000000000000000fc807d1be4997e5c7b33e4d8d57e60c5b0f02b1a0000000000000000000000000000000000000000000000000000000000000064"
    }
  ],
  "paymasterUrl": "https://api.developer.coinbase.com/rpc/v1/base/<token>"
}'
{
  "network": "base-sepolia",
  "userOpHash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
  "calls": [
    {
      "to": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
      "value": "0",
      "data": "0xa9059cbb000000000000000000000000fc807d1be4997e5c7b33e4d8d57e60c5b0f02b1a0000000000000000000000000000000000000000000000000000000000000064"
    },
    {
      "to": "0xdac17f958d2ee523a2206206994597c13d831ec7",
      "value": "1000000000000000",
      "data": "0x"
    }
  ],
  "status": "pending",
  "transactionHash": "0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
}

Authorizations

​
Authorization
string
header
required

A JWT signed using your CDP API Key Secret, encoded in base64. Refer to the Generate Bearer Token section of our Authentication docs for information on how to generate your Bearer Token.

Path Parameters

​
address
string
required

The address of the Smart Account to create the user operation on.

Body

application/json

Response

201
application/json

The prepared user operation.

The response is of type object.