POST
/
v2
/
evm
/
smart-accounts
/
{address}
/
user-operations
/
{userOpHash}
/
send
Send a user operation
curl --request POST \
  --url https://api.cdp.coinbase.com/platform/v2/evm/smart-accounts/{address}/user-operations/{userOpHash}/send \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "signature": "0x1b0c9cf8cd4554c6c6d9e7311e88f1be075d7f25b418a044f4bf2c0a42a93e212ad0a8b54de9e0b5f7e3812de3f2c6cc79aa8c3e1c02e7ad14b4a8f42012c2c01b"
}'
{
  "network": "base",
  "userOpHash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
  "calls": [
    {
      "to": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
      "value": "0",
      "data": "0xa9059cbb000000000000000000000000fc807d1be4997e5c7b33e4d8d57e60c5b0f02b1a0000000000000000000000000000000000000000000000000000000000000064"
    },
    {
      "to": "0xdac17f958d2ee523a2206206994597c13d831ec7",
      "value": "1000000000000000",
      "data": "0x"
    }
  ],
  "status": "pending",
  "transactionHash": "0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
  "receipts": [
    {
      "revert": {
        "data": "0x123",
        "message": "reason for failure"
      },
      "blockHash": "0x386544b58930c0ec9e8f3ed09fb4cdb76b9ae0a1a37ddcacebe3925b57978e65",
      "blockNumber": 29338819,
      "gasUsed": "100000"
    }
  ]
}

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 send the user operation from.

​
userOpHash
string
required

The hash of the user operation to send.

Body

application/json
​
signature
string
required

The hex-encoded signature of the user operation. This should be a 65-byte signature consisting of the r, s, and v values of the ECDSA signature. Note that the v value should conform to the personal_sign standard, which means it should be 27 or 28.

Example:

"0x1b0c9cf8cd4554c6c6d9e7311e88f1be075d7f25b418a044f4bf2c0a42a93e212ad0a8b54de9e0b5f7e3812de3f2c6cc79aa8c3e1c02e7ad14b4a8f42012c2c01b"

Response

The sent user operation.

​
network
enum<string>
required

The network the user operation is for.

Available options:
base-sepolia,
base,
arbitrum,
optimism,
zora,
polygon,
bnb,
avalanche,
ethereum,
ethereum-sepolia
Example:

"base"

​
userOpHash
string
required

The hash of the user operation. This is not the transaction hash, as a transaction consists of multiple user operations. The user operation hash is the hash of this particular user operation which gets signed by the owner of the Smart Account.

Example:

"0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"

​
calls
object[]
required

The list of calls in the user operation.

Example:
[
  {
    "to": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
    "value": "0",
    "data": "0xa9059cbb000000000000000000000000fc807d1be4997e5c7b33e4d8d57e60c5b0f02b1a0000000000000000000000000000000000000000000000000000000000000064"
  },
  {
    "to": "0xdac17f958d2ee523a2206206994597c13d831ec7",
    "value": "1000000000000000",
    "data": "0x"
  }
]
​
status
enum<string>
required

The status of the user operation.

Available options:
pending,
signed,
broadcast,
complete,
dropped,
failed
Example:

"pending"

​
transactionHash
string

The hash of the transaction that included this particular user operation. This gets set after the user operation is broadcasted and the transaction is included in a block.

Example:

"0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"

​
receipts
object[]

The list of receipts associated with the user operation.

Example:
[
  {
    "revert": {
      "data": "0x123",
      "message": "reason for failure"
    },
    "blockHash": "0x386544b58930c0ec9e8f3ed09fb4cdb76b9ae0a1a37ddcacebe3925b57978e65",
    "blockNumber": 29338819,
    "gasUsed": "100000"
  }
]