Fixed optional id on notifications

Author: odrobnik

.github/workflows/swift.yml

@@ -0,0 +1,42 @@
+name: Swift
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Setup Swift 6.0
+        uses: swift-actions/setup-swift@v2.2.0
+        with:
+          swift-version: "6.0"
+
+      - name: Verify Swift version
+        run: swift --version
+      
+      - name: Build & Test
+        run: swift test
+
+  build-linux:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Setup Swift 6.0
+        uses: swift-actions/setup-swift@v2.2.0
+        with:
+          swift-version: "6.0"
+
+      - name: Verify Swift version
+        run: swift --version
+      
+      - name: Build & Test
+        run: swift test 

Sources/SwiftMCP/Models/JSONRPC/JSONRPCRequest.swift

@@ -4,11 +4,11 @@ import AnyCodable
 /// JSON-RPC Request structure used for communication with the MCP server
 public struct JSONRPCRequest: Codable {
     public let jsonrpc: String
-    public let id: Int
+    public let id: Int?
     public let method: String
     public let params: [String: AnyCodable]?
 
-    public init(jsonrpc: String, id: Int, method: String, params: [String: AnyCodable]? = nil) {
+    public init(jsonrpc: String, id: Int?, method: String, params: [String: AnyCodable]? = nil) {
         self.jsonrpc = jsonrpc
         self.id = id
         self.method = method
@@ -42,4 +42,4 @@ public struct JSONRPCRequest: Codable {
 
         return current
     }
-} 
+} 

Sources/SwiftMCP/Models/JSONRPC/JSONRPCResponse.swift

@@ -5,10 +5,10 @@ import Foundation
 /// JSON-RPC Response structures
 public struct JSONRPCResponse: Codable {
     public var jsonrpc: String = "2.0"
-    public let id: Int
+    public let id: Int?
     public let result: ResponseResult
 
-    public init(jsonrpc: String = "2.0", id: Int, result: ResponseResult) {
+    public init(jsonrpc: String = "2.0", id: Int?, result: ResponseResult) {
         self.jsonrpc = jsonrpc
         self.id = id
         self.result = result
@@ -53,4 +53,4 @@ public struct JSONRPCResponse: Codable {
             }
         }
     }
-} 
+} 

Sources/SwiftMCP/Protocols/MCPServer.swift

@@ -29,13 +29,14 @@ public extension MCPServer {
         // Prepare the response based on the method
         switch request.method {
             case "initialize":
-                return createInitializeResponse(id: request.id)
+				
+                return createInitializeResponse(id: request.id ?? 0)
 
             case "notifications/initialized":
                 return nil
 
             case "tools/list":
-                return createToolsResponse(id: request.id)
+                return createToolsResponse(id: request.id ?? 0)
 
             case "tools/call":
                 return handleToolCall(request)
@@ -105,7 +106,7 @@ public extension MCPServer {
         }
 
         // Create and encode the response
-        return ToolCallResponse(id: request.id, text: responseText, isError: isError)
+        return ToolCallResponse(id: request.id ?? 0, text: responseText, isError: isError)
     }
 
     /// Function to log a message to stderr