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EVM Smart Accounts

Prepare and send user operation

Changed on

Prepares, signs, and sends a user operation for an EVM Smart Account. This API can be used only if the owner on Smart Account is a CDP EVM Account.

post/v2/evm/smart-accounts/{address}/user-operations/prepare-and-send

Request

  • Base URL: https://api.cdp.coinbase.com/platform
  • URL: https://api.cdp.coinbase.com/platform/v2/evm/smart-accounts/{address}/user-operations/prepare-and-send
  • Auth: HTTP bearer

Path parameters

addressstring required

The address of the EVM Smart Account to execute the user operation from.

Headers

X-Idempotency-Keystring

An optional string request header for making requests safely retryable. When included, duplicate requests with the same key will return identical responses. Refer to our Idempotency docs for more information on using idempotency keys.

X-Wallet-Authstring required

A JWT signed using your Wallet Secret, encoded in base64. Refer to the Generate Wallet Token section of our Authentication docs for more details on how to generate your Wallet Token.

Request body

network'base-sepolia' | 'base' | 'arbitrum' | 'optimism' | 'zora' | 'polygon' | 'bnb' | 'avalanche' | 'ethereum' | 'ethereum-sepolia' required

The network the user operation is for.

paymasterUrlstring uri

A valid HTTP or HTTPS URL.

paymasterContextPaymasterContext

The ERC-7677 context object forwarded to the paymaster service as part of the paymasterService capability. The fields in this object are defined by the paymaster service provider; CDP forwards them to the paymaster unchanged. This field is only valid when a paymaster is configured for the request. Providing paymasterContext without a paymaster configured results in an invalid_request error.

Example request

{
  "network": "base",
  "calls": [
    {
      "to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      "value": "0",
      "data": "0xa9059cbb000000000000000000000000fc807d1be4997e5c7b33e4d8d57e60c5b0f02b1a0000000000000000000000000000000000000000000000000000000000000064",
      "overrideGasLimit": "100000"
    }
  ],
  "paymasterUrl": "https://example.com",
  "paymasterContext": {
    "policyId": "962b252c-a726-4a37-8d86-333ce0a07299"
  }
}

Response

The user operation was successfully prepared, signed, and sent.

network'base-sepolia' | 'base' | 'arbitrum' | 'optimism' | 'zora' | 'polygon' | 'bnb' | 'avalanche' | 'ethereum' | 'ethereum-sepolia' required

The network the user operation is for.

userOpHashstring 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.

status'pending' | 'signed' | 'broadcast' | 'complete' | 'dropped' | 'failed' required

The status of the user operation.

transactionHashstring

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.

expiresAtstring date-time

The timestamp at which the prepared user operation expires.

Example response

{
  "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"
    }
  ],
  "expiresAt": "2025-03-25T12:00:00Z"
}

Changes

  • 156440e9f8dfRevision changes
    • warning

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    • warning

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    • warning

      added the new incompatible_event_types enum value to the response property for the response status

    • warning

      added the new incompatible_event_types enum value to the response property for the response status

    • warning

      added the new incompatible_event_types enum value to the response property for the response status

    • warning

      added the new incompatible_event_types enum value to the response property for the response status

    • warning

      added the new incompatible_event_types enum value to the response property for the response status

    • warning

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    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

      added the new invalid_webhook_headers enum value to the response property for the response status

    • warning

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    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new invalid_webhook_url enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_action_pending enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_canceled enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_expired enum value to the response property for the response status

    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

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    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

      added the new mandate_invalid_status enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_policy_violation enum value to the response property for the response status

    • warning

      added the new mandate_revoked enum value to the response property for the response status

    • warning

      added the new mandate_revoked enum value to the response property for the response status

    • warning

      added the new mandate_revoked enum value to the response property for the response status

    • warning

      added the new mandate_revoked enum value to the response property for the response status

    • warning

      added the new mandate_revoked enum value to the response property for the response status

    • warning

      added the new mandate_revoked enum value to the response property for the response status

    • warning

      added the new mandate_revoked enum value to the response property for the response status

    • warning

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    • warning

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    • warning

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    • warning

      added the new subscription_limit_exceeded enum value to the response property for the response status

    • warning

      added the new subscription_limit_exceeded enum value to the response property for the response status

    • warning

      added the new subscription_limit_exceeded enum value to the response property for the response status

    • warning

      added the new subscription_limit_exceeded enum value to the response property for the response status

    • warning

      added the new subscription_limit_exceeded enum value to the response property for the response status

    • warning

      added the new subscription_limit_exceeded enum value to the response property for the response status

    • warning

      added the new subscription_limit_exceeded enum value to the response property for the response status

  • 229ed860a74bRevision changes
    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new mfa_challenge_not_found enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status

    • warning

      added the new operation_in_progress enum value to the response property for the response status