Execute User Operation
This endpoint queues to execution a user operation on the blockchain, like a swap quote or a transfer. The execution occurs asynchronously as it waits to be included in a block. You can check the status by using the returned hash in the history endpoint or with our webhooks.
In: header
Unique identifier for the swap quote, required to execute the transaction.
^0x[a-fA-F0-9]{64}$DEPRECATED: Use userOperationHash instead. Will be ignored if userOperationHash is used.
^0x[a-fA-F0-9]{64}$The signature of the transaction, required to execute the transaction.
^0x([a-fA-F0-9]{2})*$The signature of the authorization, required to execute the first transaction of an EIP-7702 wallet. If the authorization field was null in the operation you requested, then you don't have to send this.
ATTENTION: viem's signAuthorization() returns the signature as {r, s, yParity} values. Use plain sign() with the returned hash field instead that already returns the signature in the expected format. Or call serializeSignature() after signAuthorization() to serialize it for this endpoint.
^0x([a-fA-F0-9]{2})*$Response Body
curl -X POST "https://api.notus.team/api/v1/crypto/execute-user-op" \ -H "Content-Type: application/json" \ -d '{ "signature": "0xeecdd469465113db97d2d57949c581a080a4e7d7c528187ffc80e4f55ca68e083dcda2338666db182417608b971f5237c5807d67c7515e52f9ffe045e775ec791b" }'{
"userOperationHash": "0x2aac7a66d5331454eafc9b981be3596ad08a40dad24883e3b9c4a5362cd7f7e1",
"userOpHash": "0x2aac7a66d5331454eafc9b981be3596ad08a40dad24883e3b9c4a5362cd7f7e1",
"estimatedExecutionTime": "2026-04-12T14:49:12.762Z"
}{
"statusCode": 400,
"id": "EXECUTE_USER_OP",
"message": "Your User Operation has expired. Please, request a new one."
}{
"statusCode": 403,
"id": "UNAVAILABLE_COMPUTE_UNITS",
"message": "The project doesn't have enough compute units to perform this action. Please upgrade your plan."
}{
"statusCode": 404,
"id": "USER_OPERATION_NOT_FOUND",
"message": "Could not find the User Operation requested"
}{
"statusCode": 500,
"id": "EXECUTE_USER_OP",
"message": "Failed to execute user operation. Please try again later"
}Create Custom User Operation POST
Enables you to create custom user operations with full control over transaction parameters. User Operations are the transaction format used in Account Abstraction, they are blockchain transactions executed through smart wallets. This endpoint allows you to execute any smart contract function, transfer native tokens, or perform complex operations by defining your own method signatures, call data, and more.
Get User Operation GET
Get a user operation by its hash