# eth_sendUserOperation > For the complete documentation index, see [llms.txt](/docs/llms.txt). POST https://eth-mainnet.g.alchemy.com/v2/{apiKey} Sends a `UserOperation` to the given EVM network. Reference: https://www.alchemy.com/docs/wallets/api-reference/bundler-api/bundler-api-endpoints/eth-send-user-operation ## Parameters | Name | Type | Required | Description | |------|------|----------|-------------| | UserOperation | object | Yes | The UserOperation object. This can be a v0.6, v0.7, or v0.8 user operation, but MUST match the version of the entry point at the address of the second parameter. | | Entrypoint address | string | Yes | The EntryPoint address the request should be sent through. This MUST be one of the EntryPoints returned by the `supportedEntryPoints` RPC call. | ## Result **userOpHash** (string): The calculated `userOpHash` for the `UserOperation`. ## Example ### Request ```json { "jsonrpc": "2.0", "method": "eth_sendUserOperation", "params": [ { "sender": "0x...", "nonce": "0x...", "callData": "0x..." }, "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789" ], "id": 1 } ``` ### Response ```json { "jsonrpc": "2.0", "result": { "result": "0x1234...5678" }, "id": 1 } ``` ## Code Examples ### cURL ```bash curl --request POST \ --url https://eth-mainnet.g.alchemy.com/v2/docs-demo \ --header 'Content-Type: application/json' \ --data '{ "jsonrpc": "2.0", "id": 1, "method": "eth_sendUserOperation", "params": [ { "sender": "string", "nonce": "string", "initCode": "string", "callData": "string", "callGasLimit": "string", "verificationGasLimit": "string", "preVerificationGas": "string", "maxFeePerGas": "string", "maxPriorityFeePerGas": "string", "signature": "string", "paymasterAndData": "string", "eip7702Auth": { "chain_id": "string", "address": "string", "nonce": "string", "y_parity": "string", "r": "string", "s": "string" } }, "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789" ] }' ``` ### JavaScript ```javascript const options = { method: 'POST', headers: {'Content-Type': 'application/json'}, body: JSON.stringify({ jsonrpc: '2.0', id: 1, method: 'eth_sendUserOperation', params: [ { sender: 'string', nonce: 'string', initCode: 'string', callData: 'string', callGasLimit: 'string', verificationGasLimit: 'string', preVerificationGas: 'string', maxFeePerGas: 'string', maxPriorityFeePerGas: 'string', signature: 'string', paymasterAndData: 'string', eip7702Auth: { chain_id: 'string', address: 'string', nonce: 'string', y_parity: 'string', r: 'string', s: 'string' } }, '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789' ] }) }; fetch('https://eth-mainnet.g.alchemy.com/v2/docs-demo', options) .then(res => res.json()) .then(res => console.log(res)) .catch(err => console.error(err)); ``` ### Python ```python import requests url = "https://eth-mainnet.g.alchemy.com/v2/docs-demo" payload = { "jsonrpc": "2.0", "id": 1, "method": "eth_sendUserOperation", "params": [ { "sender": "string", "nonce": "string", "initCode": "string", "callData": "string", "callGasLimit": "string", "verificationGasLimit": "string", "preVerificationGas": "string", "maxFeePerGas": "string", "maxPriorityFeePerGas": "string", "signature": "string", "paymasterAndData": "string", "eip7702Auth": { "chain_id": "string", "address": "string", "nonce": "string", "y_parity": "string", "r": "string", "s": "string" } }, "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789" ] } headers = {"Content-Type": "application/json"} response = requests.post(url, json=payload, headers=headers) print(response.text) ``` ### Go ```go package main import ( "fmt" "strings" "net/http" "io" ) func main() { url := "https://eth-mainnet.g.alchemy.com/v2/docs-demo" payload := strings.NewReader("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"eth_sendUserOperation\",\n \"params\": [\n {\n \"sender\": \"string\",\n \"nonce\": \"string\",\n \"initCode\": \"string\",\n \"callData\": \"string\",\n \"callGasLimit\": \"string\",\n \"verificationGasLimit\": \"string\",\n \"preVerificationGas\": \"string\",\n \"maxFeePerGas\": \"string\",\n \"maxPriorityFeePerGas\": \"string\",\n \"signature\": \"string\",\n \"paymasterAndData\": \"string\",\n \"eip7702Auth\": {\n \"chain_id\": \"string\",\n \"address\": \"string\",\n \"nonce\": \"string\",\n \"y_parity\": \"string\",\n \"r\": \"string\",\n \"s\": \"string\"\n }\n },\n \"0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789\"\n ]\n}") req, _ := http.NewRequest("POST", url, payload) req.Header.Add("Content-Type", "application/json") res, _ := http.DefaultClient.Do(req) defer res.Body.Close() body, _ := io.ReadAll(res.Body) fmt.Println(string(body)) } ``` ### Java ```java HttpResponse response = Unirest.post("https://eth-mainnet.g.alchemy.com/v2/docs-demo") .header("Content-Type", "application/json") .body("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"eth_sendUserOperation\",\n \"params\": [\n {\n \"sender\": \"string\",\n \"nonce\": \"string\",\n \"initCode\": \"string\",\n \"callData\": \"string\",\n \"callGasLimit\": \"string\",\n \"verificationGasLimit\": \"string\",\n \"preVerificationGas\": \"string\",\n \"maxFeePerGas\": \"string\",\n \"maxPriorityFeePerGas\": \"string\",\n \"signature\": \"string\",\n \"paymasterAndData\": \"string\",\n \"eip7702Auth\": {\n \"chain_id\": \"string\",\n \"address\": \"string\",\n \"nonce\": \"string\",\n \"y_parity\": \"string\",\n \"r\": \"string\",\n \"s\": \"string\"\n }\n },\n \"0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789\"\n ]\n}") .asString(); ``` ### C# ```csharp using RestSharp; var options = new RestClientOptions("https://eth-mainnet.g.alchemy.com/v2/docs-demo"); var client = new RestClient(options); var request = new RestRequest(""); request.AddJsonBody("{\n \"jsonrpc\": \"2.0\",\n \"id\": 1,\n \"method\": \"eth_sendUserOperation\",\n \"params\": [\n {\n \"sender\": \"string\",\n \"nonce\": \"string\",\n \"initCode\": \"string\",\n \"callData\": \"string\",\n \"callGasLimit\": \"string\",\n \"verificationGasLimit\": \"string\",\n \"preVerificationGas\": \"string\",\n \"maxFeePerGas\": \"string\",\n \"maxPriorityFeePerGas\": \"string\",\n \"signature\": \"string\",\n \"paymasterAndData\": \"string\",\n \"eip7702Auth\": {\n \"chain_id\": \"string\",\n \"address\": \"string\",\n \"nonce\": \"string\",\n \"y_parity\": \"string\",\n \"r\": \"string\",\n \"s\": \"string\"\n }\n },\n \"0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789\"\n ]\n}", false); var response = await client.PostAsync(request); Console.WriteLine("{0}", response.Content); ``` ## OpenRPC Method Specification ```yaml name: eth_sendUserOperation description: | Sends a `UserOperation` to the given EVM network. params: - name: UserOperation required: true description: The UserOperation object. This can be a v0.6, v0.7, or v0.8 user operation, but MUST match the version of the entry point at the address of the second parameter. schema: oneOf: - type: object title: User Operation v0.6 properties: sender: title: hex encoded address type: string pattern: ^0x[0-9a-fA-F]{40}$ description: The account making the operation nonce: description: Anti-replay parameter; used as salt for first-time account creation title: hex encoded unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]*|0)$ initCode: description: The initCode of the account (needed if the account is not yet on-chain and needs creation) title: hex encoded bytes type: string pattern: ^0x[0-9a-f]*$ callData: description: Encoded data for the primary function call or operation title: hex encoded bytes type: string pattern: ^0x[0-9a-f]*$ callGasLimit: description: Gas allocated for the main execution call title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ verificationGasLimit: description: Gas allocated for verification title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ preVerificationGas: description: Gas for pre-verification execution and calldata title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ maxFeePerGas: description: Maximum fee per gas (EIP-1559) title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ maxPriorityFeePerGas: description: Max priority fee per gas (EIP-1559) title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ signature: description: Data passed during verification title: hex encoded bytes (any case) type: string pattern: ^0x[0-9a-fA-F]*$ paymasterAndData: description: Paymaster address and extra data title: hex encoded bytes type: string pattern: ^0x[0-9a-f]*$ eip7702Auth: description: The authorization tuple that an EOA account delegates to in EIP-7702 title: Eip 7702 Auth type: object properties: chain_id: description: The chain Id of the authorization title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ address: title: hex encoded address type: string pattern: ^0x[0-9a-fA-F]{40}$ description: The address of the authorization nonce: description: The nonce for the authorization title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ y_parity: description: Y parity of signed authorizzation tuple title: hex encoded unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]*|0)$ r: description: R of signed authorizzation tuple title: hex encoded 256 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,31})|0$ s: description: S of signed authorizzation tuple title: hex encoded 256 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,31})|0$ - type: object title: User Operation v0.7 / v0.8 properties: sender: title: hex encoded address type: string pattern: ^0x[0-9a-fA-F]{40}$ description: Account initiating operation nonce: description: Account nonce or creation salt title: hex encoded unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]*|0)$ callData: description: Data for operation call title: hex encoded bytes type: string pattern: ^0x[0-9a-f]*$ callGasLimit: description: Gas allocated for call title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ verificationGasLimit: description: Gas allocated for verification title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ maxFeePerGas: description: Max fee per gas (EIP-1559) title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ maxPriorityFeePerGas: description: Priority fee per gas (EIP-1559) title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ paymaster: title: hex encoded address type: string pattern: ^0x[0-9a-fA-F]{40}$ description: Paymaster contract address paymasterData: description: Data for paymaster title: hex encoded bytes type: string pattern: ^0x[0-9a-f]*$ paymasterVerificationGasLimit: type: string description: The gas limit for paymaster verification. factory: title: hex encoded address type: string pattern: ^0x[0-9a-fA-F]{40}$ description: The account factory address (needed if and only if the account is not yet on-chain and needs to be created) factoryData: description: Data for the account factory (only if the account factory exists) title: hex encoded bytes type: string pattern: ^0x[0-9a-f]*$ preVerificationGas: description: The amount of gas to pay for to compensate the bundler for pre-verification execution and calldata title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ paymasterPostOpGasLimit: description: The amount of gas to allocate for the paymaster post-op code (only if a paymaster exists) title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ signature: description: Data passed into the account along with the nonce during the verification step title: hex encoded bytes (any case) type: string pattern: ^0x[0-9a-fA-F]*$ eip7702Auth: description: The authorization tuple that an EOA account delegates to in EIP-7702 title: Eip 7702 Auth type: object properties: chain_id: description: The chain Id of the authorization title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ address: title: hex encoded address type: string pattern: ^0x[0-9a-fA-F]{40}$ description: The address of the authorization nonce: description: The nonce for the authorization title: hex encoded 64 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,15})|0$ y_parity: description: Y parity of signed authorizzation tuple title: hex encoded unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]*|0)$ r: description: R of signed authorizzation tuple title: hex encoded 256 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,31})|0$ s: description: S of signed authorizzation tuple title: hex encoded 256 bit unsigned integer type: string pattern: ^0x([1-9a-f]+[0-9a-f]{0,31})|0$ - name: Entrypoint address required: true description: The EntryPoint address the request should be sent through. This MUST be one of the EntryPoints returned by the `supportedEntryPoints` RPC call. schema: title: hex encoded address type: string pattern: ^0x[0-9a-fA-F]{40}$ result: name: userOpHash description: The calculated `userOpHash` for the `UserOperation`. schema: type: string format: hex examples: - name: eth_sendUserOperation example params: - name: UserOperation value: sender: 0x... nonce: 0x... callData: 0x... - name: Entrypoint address value: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789' result: name: userOpHash value: result: 0x1234...5678 ```