diff --git a/Sources/KukaiCoreSwift/Models/RPC.swift b/Sources/KukaiCoreSwift/Models/RPC.swift
index e64c34c7..7a2f1748 100644
--- a/Sources/KukaiCoreSwift/Models/RPC.swift
+++ b/Sources/KukaiCoreSwift/Models/RPC.swift
@@ -175,13 +175,21 @@ extension RPC where T == [OperationResponse] {
 
 extension RPC where T == OperationResponse {
 	
-	/// Creates an RPC to estimate an operation
+	/// Creates an RPC to estimate an operation - deprecated
 	public static func runOperation(runOperationPayload: RunOperationPayload) -> RPC<OperationResponse>? {
 		guard let payloadData = RPC.encodableToData(encodable: runOperationPayload) else {
 			return nil
 		}
 		
-		//return RPC<OperationResponse>(endpoint: "chains/main/blocks/head/helpers/scripts/run_operation", payload: payloadData, responseType: OperationResponse.self)
+		return RPC<OperationResponse>(endpoint: "chains/main/blocks/head/helpers/scripts/run_operation", payload: payloadData, responseType: OperationResponse.self)
+	}
+	
+	/// Creates an RPC to estimate an operation
+	public static func simulateOperation(runOperationPayload: RunOperationPayload) -> RPC<OperationResponse>? {
+		guard let payloadData = RPC.encodableToData(encodable: runOperationPayload) else {
+			return nil
+		}
+		
 		return RPC<OperationResponse>(endpoint: "chains/main/blocks/head/helpers/scripts/simulate_operation", payload: payloadData, responseType: OperationResponse.self)
 	}
 }
diff --git a/Sources/KukaiCoreSwift/Services/FeeEstimatorService.swift b/Sources/KukaiCoreSwift/Services/FeeEstimatorService.swift
index c1aab166..244d4ec7 100644
--- a/Sources/KukaiCoreSwift/Services/FeeEstimatorService.swift
+++ b/Sources/KukaiCoreSwift/Services/FeeEstimatorService.swift
@@ -158,7 +158,7 @@ public class FeeEstimatorService {
 
 	/// Breaking out part of the estimation process to keep code cleaner
 	private func estimate(runOperationPayload: RunOperationPayload, preparedOperationsCopy: [Operation], constants: NetworkConstants, forgedHex: String, originalRemoteOps: [Operation], completion: @escaping ((Result<EstimationResult, KukaiError>) -> Void)) {
-		guard let rpc = RPC.runOperation(runOperationPayload: runOperationPayload) else {
+		guard let rpc = RPC.simulateOperation(runOperationPayload: runOperationPayload) else {
 			Logger.kukaiCoreSwift.error("Unable to create runOperation RPC, cancelling event")
 			completion(Result.failure(KukaiError.internalApplicationError(error: FeeEstimatorServiceError.unableToSetupRunOperation)))
 			return
diff --git a/Tests/KukaiCoreSwiftTests/MockConstants.swift b/Tests/KukaiCoreSwiftTests/MockConstants.swift
index c0e8882c..1bb0e973 100644
--- a/Tests/KukaiCoreSwiftTests/MockConstants.swift
+++ b/Tests/KukaiCoreSwiftTests/MockConstants.swift
@@ -139,6 +139,8 @@ public struct MockConstants {
 			baseURL.appendingPathComponent("chains/main/blocks/head~3"): (MockConstants.jsonStub(fromFilename: "head"), MockConstants.http200),
 			baseURL.appendingPathComponent("chains/main/blocks/head/helpers/scripts/run_operation"): (MockConstants.jsonStub(fromFilename: "run_operation"), MockConstants.http200),
 			secondBaseURL.appendingPathComponent("chains/main/blocks/head/helpers/scripts/run_operation"): (MockConstants.jsonStub(fromFilename: "run_operation"), MockConstants.http200),
+			baseURL.appendingPathComponent("chains/main/blocks/head/helpers/scripts/simulate_operation"): (MockConstants.jsonStub(fromFilename: "run_operation"), MockConstants.http200),
+			secondBaseURL.appendingPathComponent("chains/main/blocks/head/helpers/scripts/simulate_operation"): (MockConstants.jsonStub(fromFilename: "run_operation"), MockConstants.http200),
 			baseURL.appendingPathComponent("chains/main/blocks/head/helpers/forge/operations"): (MockConstants.jsonStub(fromFilename: "forge"), MockConstants.http200),
 			// Parse is handled inside MockURLProtocol due to its special requirements
 			baseURL.appendingPathComponent("chains/main/blocks/head/helpers/preapply/operations"): (MockConstants.jsonStub(fromFilename: "preapply"), MockConstants.http200),
diff --git a/Tests/KukaiCoreSwiftTests/MockURLProtocol.swift b/Tests/KukaiCoreSwiftTests/MockURLProtocol.swift
index fbde5483..ba82bbf2 100644
--- a/Tests/KukaiCoreSwiftTests/MockURLProtocol.swift
+++ b/Tests/KukaiCoreSwiftTests/MockURLProtocol.swift
@@ -151,13 +151,13 @@ class MockURLProtocol: URLProtocol {
 		
 	}
 	
-	static func triggerGasExhaustedErrorOnRunOperation(nodeUrl: Int = 0) {
-		let url = MockConstants.shared.config.nodeURLs[nodeUrl].appendingPathComponent("chains/main/blocks/head/helpers/scripts/run_operation")
+	static func triggerGasExhaustedErrorOnSimulateOperation(nodeUrl: Int = 0) {
+		let url = MockConstants.shared.config.nodeURLs[nodeUrl].appendingPathComponent("chains/main/blocks/head/helpers/scripts/simulate_operation")
 		MockURLProtocol.errorURLs[url] = (data: MockConstants.jsonStub(fromFilename: "rpc_error_gas"), response: MockConstants.http200)
 	}
 	
-	static func triggerAssertErrorOnRunOperation(nodeUrl: Int = 0) {
-		let url = MockConstants.shared.config.nodeURLs[nodeUrl].appendingPathComponent("chains/main/blocks/head/helpers/scripts/run_operation")
+	static func triggerAssertErrorOnSimulateOperation(nodeUrl: Int = 0) {
+		let url = MockConstants.shared.config.nodeURLs[nodeUrl].appendingPathComponent("chains/main/blocks/head/helpers/scripts/simulate_operation")
 		MockURLProtocol.errorURLs[url] = (data: MockConstants.jsonStub(fromFilename: "rpc_error_assert"), response: MockConstants.http200)
 	}
 	
@@ -166,8 +166,8 @@ class MockURLProtocol: URLProtocol {
 		MockURLProtocol.errorURLs[url] = (data: MockConstants.jsonStub(fromFilename: "rpc_error_counter-in-future"), response: MockConstants.http500)
 	}
 	
-	static func triggerHttp500ErrorOnRunOperation(nodeUrl: Int = 0) {
-		let url = MockConstants.shared.config.nodeURLs[nodeUrl].appendingPathComponent("chains/main/blocks/head/helpers/scripts/run_operation")
+	static func triggerHttp500ErrorOnSimulateOperation(nodeUrl: Int = 0) {
+		let url = MockConstants.shared.config.nodeURLs[nodeUrl].appendingPathComponent("chains/main/blocks/head/helpers/scripts/simulate_operation")
 		MockURLProtocol.errorURLs[url] = (data: nil, response: MockConstants.http500)
 	}
 }
diff --git a/Tests/KukaiCoreSwiftTests/Services/NetworkServiceTests.swift b/Tests/KukaiCoreSwiftTests/Services/NetworkServiceTests.swift
index b6cd7007..99922681 100644
--- a/Tests/KukaiCoreSwiftTests/Services/NetworkServiceTests.swift
+++ b/Tests/KukaiCoreSwiftTests/Services/NetworkServiceTests.swift
@@ -62,12 +62,12 @@ class NetworkServiceTests: XCTestCase {
 	}
 	
 	func testErrorGas() {
-		MockURLProtocol.triggerGasExhaustedErrorOnRunOperation(nodeUrl: 0)
-		MockURLProtocol.triggerGasExhaustedErrorOnRunOperation(nodeUrl: 1)
+		MockURLProtocol.triggerGasExhaustedErrorOnSimulateOperation(nodeUrl: 0)
+		MockURLProtocol.triggerGasExhaustedErrorOnSimulateOperation(nodeUrl: 1)
 		
 		let expectation = XCTestExpectation(description: "network service error gas")
 		
-		if let rpc = RPC.runOperation(runOperationPayload: RunOperationPayload(chainID: MockConstants.blockchainHead.chainID, operation: MockConstants.sendOperationPayload)) {
+		if let rpc = RPC.simulateOperation(runOperationPayload: RunOperationPayload(chainID: MockConstants.blockchainHead.chainID, operation: MockConstants.sendOperationPayload)) {
 			MockConstants.shared.networkService.send(rpc: rpc, withNodeURLs: MockConstants.shared.config.nodeURLs) { result in
 				
 				switch result {
@@ -76,7 +76,7 @@ class NetworkServiceTests: XCTestCase {
 						
 					case .failure(let error):
 						XCTAssert(error.errorType == .rpc, error.description)
-						XCTAssert(error.requestURL?.absoluteString == MockConstants.shared.config.nodeURLs[1].appendingPathComponent("chains/main/blocks/head/helpers/scripts/run_operation").absoluteString, error.requestURL?.absoluteString ?? "-")
+						XCTAssert(error.requestURL?.absoluteString == MockConstants.shared.config.nodeURLs[1].appendingPathComponent("chains/main/blocks/head/helpers/scripts/simulate_operation").absoluteString, error.requestURL?.absoluteString ?? "-")
 						XCTAssert(error.requestJSON != nil)
 						XCTAssert(error.responseJSON != nil)
 				}
@@ -92,11 +92,11 @@ class NetworkServiceTests: XCTestCase {
 	}
 	
 	func testErrorAssert() {
-		MockURLProtocol.triggerAssertErrorOnRunOperation()
+		MockURLProtocol.triggerAssertErrorOnSimulateOperation()
 		
 		let expectation = XCTestExpectation(description: "network service error gas")
 		
-		if let rpc = RPC.runOperation(runOperationPayload: RunOperationPayload(chainID: MockConstants.blockchainHead.chainID, operation: MockConstants.sendOperationPayload)) {
+		if let rpc = RPC.simulateOperation(runOperationPayload: RunOperationPayload(chainID: MockConstants.blockchainHead.chainID, operation: MockConstants.sendOperationPayload)) {
 			MockConstants.shared.networkService.send(rpc: rpc, withNodeURLs: MockConstants.shared.config.nodeURLs) { result in
 				
 				switch result {
@@ -106,7 +106,7 @@ class NetworkServiceTests: XCTestCase {
 					case .failure(let error):
 						XCTAssert(error.errorType == .unknown)
 						XCTAssert(error.description == "Unknown: Assert_failure src/proto_009_PsFLoren/lib_protocol/operation_repr.ml:203:6", error.description)
-						XCTAssert(error.requestURL?.absoluteString == MockConstants.shared.config.nodeURLs[0].appendingPathComponent("chains/main/blocks/head/helpers/scripts/run_operation").absoluteString)
+						XCTAssert(error.requestURL?.absoluteString == MockConstants.shared.config.nodeURLs[0].appendingPathComponent("chains/main/blocks/head/helpers/scripts/simulate_operation").absoluteString)
 						XCTAssert(error.requestJSON != nil)
 						XCTAssert(error.responseJSON != nil)
 				}
@@ -183,11 +183,11 @@ class NetworkServiceTests: XCTestCase {
 	}
 	
 	func testRpcRetryLogic() {
-		MockURLProtocol.triggerHttp500ErrorOnRunOperation()
+		MockURLProtocol.triggerHttp500ErrorOnSimulateOperation()
 		
 		let expectation = XCTestExpectation(description: "network service retry logic")
 		
-		if let rpc = RPC.runOperation(runOperationPayload: RunOperationPayload(chainID: MockConstants.blockchainHead.chainID, operation: MockConstants.sendOperationPayload)) {
+		if let rpc = RPC.simulateOperation(runOperationPayload: RunOperationPayload(chainID: MockConstants.blockchainHead.chainID, operation: MockConstants.sendOperationPayload)) {
 			MockConstants.shared.networkService.send(rpc: rpc, withNodeURLs: MockConstants.shared.config.nodeURLs) { result in
 				
 				switch result {