diff --git a/Demo/App/APIKeyModalView.swift b/Demo/App/APIKeyModalView.swift
index 2c2620c2..06fcd559 100644
--- a/Demo/App/APIKeyModalView.swift
+++ b/Demo/App/APIKeyModalView.swift
@@ -13,14 +13,19 @@ struct APIKeyModalView: View {
     let isMandatory: Bool
 
     @Binding private var apiKey: String
+    @Binding private var proxy: String
     @State private var internalAPIKey: String
+    @State private var internalProxy: String
 
     public init(
         apiKey: Binding<String>,
+        proxy: Binding<String>,
         isMandatory: Bool = true
     ) {
         self._apiKey = apiKey
+        self._proxy = proxy
         self._internalAPIKey = State(initialValue: apiKey.wrappedValue)
+        self._internalProxy = State(initialValue: proxy.wrappedValue)
         self.isMandatory = isMandatory
     }
 
@@ -68,12 +73,41 @@ struct APIKeyModalView: View {
                 .background(Color.white)
                 .clipShape(RoundedRectangle(cornerRadius: 8))
 
+
+                VStack(alignment: .leading, spacing: 8) {
+                    Text(
+                        "Set your proxy."
+                    )
+                    .font(.caption)
+                }
+
+                TextEditor(
+                    text: $internalProxy
+                )
+                .frame(height: 120)
+                .font(.caption)
+                .padding(8)
+                .background(
+                    RoundedRectangle(
+                        cornerRadius: 8
+                    )
+                    .stroke(
+                        strokeColor,
+                        lineWidth: 1
+                    )
+                )
+                .padding(4)
+                .background(Color.white)
+                .clipShape(RoundedRectangle(cornerRadius: 8))
+
+
                 if isMandatory {
                     HStack {
                         Spacer()
 
                         Button {
                             apiKey = internalAPIKey
+                            proxy = internalProxy
                             dismiss()
                         } label: {
                           Text(
@@ -82,7 +116,7 @@ struct APIKeyModalView: View {
                           .padding(8)
                         }
                         .buttonStyle(.borderedProminent)
-                        .disabled(internalAPIKey.isEmpty)
+                        .disabled(internalAPIKey.isEmpty && internalProxy.isEmpty || !internalAPIKey.isEmpty && !internalProxy.isEmpty)
 
                         Spacer()
                     }
@@ -102,6 +136,20 @@ struct APIKeyModalView: View {
                     }
                 }
             }
+            .padding()
+            .navigationTitle("OpenAI Reverse Proxy")
+            .toolbar {
+                ToolbarItem(placement: .primaryAction) {
+                    if isMandatory {
+                        EmptyView()
+                    } else {
+                        Button("Close") {
+                            proxy = internalProxy
+                            dismiss()
+                        }
+                    }
+                }
+            }
         }
     }
 }
@@ -109,11 +157,13 @@ struct APIKeyModalView: View {
 struct APIKeyModalView_Previews: PreviewProvider {
     struct APIKeyModalView_PreviewsContainerView: View {
         @State var apiKey = ""
+        @State var proxy = ""
         let isMandatory: Bool
 
         var body: some View {
             APIKeyModalView(
                 apiKey: $apiKey,
+                proxy: $proxy,
                 isMandatory: isMandatory
             )
         }
diff --git a/Demo/App/APIProvidedView.swift b/Demo/App/APIProvidedView.swift
index 9771e1fb..8a7990d4 100644
--- a/Demo/App/APIProvidedView.swift
+++ b/Demo/App/APIProvidedView.swift
@@ -11,6 +11,7 @@ import SwiftUI
 
 struct APIProvidedView: View {
     @Binding var apiKey: String
+    @Binding var proxy: String
     @StateObject var chatStore: ChatStore
     @StateObject var imageStore: ImageStore
     @StateObject var miscStore: MiscStore
@@ -21,23 +22,32 @@ struct APIProvidedView: View {
 
     init(
         apiKey: Binding<String>,
+        proxy: Binding<String>,
         idProvider: @escaping () -> String
     ) {
         self._apiKey = apiKey
+        self._proxy = proxy
+        var client: OpenAI? = nil
+        if apiKey.wrappedValue.isEmpty && !proxy.wrappedValue.isEmpty {
+            client = OpenAI(proxy: proxy.wrappedValue)
+        } else {
+            client = OpenAI(apiToken: apiKey.wrappedValue)
+        }
+
         self._chatStore = StateObject(
             wrappedValue: ChatStore(
-                openAIClient: OpenAI(apiToken: apiKey.wrappedValue),
+                openAIClient: client!,
                 idProvider: idProvider
             )
         )
         self._imageStore = StateObject(
             wrappedValue: ImageStore(
-                openAIClient: OpenAI(apiToken: apiKey.wrappedValue)
+                openAIClient: client!
             )
         )
         self._miscStore = StateObject(
             wrappedValue: MiscStore(
-                openAIClient: OpenAI(apiToken: apiKey.wrappedValue)
+                openAIClient: client!
             )
         )
     }
@@ -54,5 +64,11 @@ struct APIProvidedView: View {
             imageStore.openAIClient = client
             miscStore.openAIClient = client
         }
+        .onChange(of: proxy) { newProxy in
+            let client = OpenAI(apiToken: newProxy)
+            chatStore.openAIClient = client
+            imageStore.openAIClient = client
+            miscStore.openAIClient = client
+        }
     }
 }
diff --git a/Demo/App/DemoApp.swift b/Demo/App/DemoApp.swift
index a11534dc..7fc6e990 100644
--- a/Demo/App/DemoApp.swift
+++ b/Demo/App/DemoApp.swift
@@ -12,6 +12,7 @@ import SwiftUI
 @main
 struct DemoApp: App {
     @AppStorage("apiKey") var apiKey: String = ""
+    @AppStorage("proxy") var proxy: String = ""
     @State var isShowingAPIConfigModal: Bool = true
 
     let idProvider: () -> String
@@ -29,16 +30,17 @@ struct DemoApp: App {
             Group {
                 APIProvidedView(
                     apiKey: $apiKey,
+                    proxy: $proxy,
                     idProvider: idProvider
                 )
             }
             #if os(iOS)
             .fullScreenCover(isPresented: $isShowingAPIConfigModal) {
-                APIKeyModalView(apiKey: $apiKey)
+                APIKeyModalView(apiKey: $apiKey, proxy: $proxy)
             }
             #elseif os(macOS)
             .popover(isPresented: $isShowingAPIConfigModal) {
-                APIKeyModalView(apiKey: $apiKey)
+                APIKeyModalView(apiKey: $apiKey, proxy: $proxy)
             }
             #endif
         }
diff --git a/Sources/OpenAI/OpenAI.swift b/Sources/OpenAI/OpenAI.swift
index 49715c8e..3ae9f5eb 100644
--- a/Sources/OpenAI/OpenAI.swift
+++ b/Sources/OpenAI/OpenAI.swift
@@ -15,8 +15,8 @@ final public class OpenAI: OpenAIProtocol {
     public struct Configuration {
         
         /// OpenAI API token. See https://platform.openai.com/docs/api-reference/authentication
-        public let token: String
-        
+        public let token: String?
+
         /// Optional OpenAI organization identifier. See https://platform.openai.com/docs/api-reference/authentication
         public let organizationIdentifier: String?
         
@@ -26,12 +26,19 @@ final public class OpenAI: OpenAIProtocol {
         /// Default request timeout
         public let timeoutInterval: TimeInterval
         
-        public init(token: String, organizationIdentifier: String? = nil, host: String = "api.openai.com", timeoutInterval: TimeInterval = 60.0) {
-            self.token = token
+        public init(organizationIdentifier: String? = nil, host: String, timeoutInterval: TimeInterval = 60.0) {
+            self.token = nil
             self.organizationIdentifier = organizationIdentifier
             self.host = host
             self.timeoutInterval = timeoutInterval
         }
+
+        public init(token: String, organizationIdentifier: String? = nil, timeoutInterval: TimeInterval = 60.0) {
+            self.token = token
+            self.organizationIdentifier = organizationIdentifier
+            self.host = "api.openai.com"
+            self.timeoutInterval = timeoutInterval
+        }
     }
     
     private let session: URLSessionProtocol
@@ -39,6 +46,10 @@ final public class OpenAI: OpenAIProtocol {
     
     public let configuration: Configuration
 
+    public convenience init(proxy: String) {
+        self.init(configuration: Configuration(host: proxy), session: URLSession.shared)
+    }
+
     public convenience init(apiToken: String) {
         self.init(configuration: Configuration(token: apiToken), session: URLSession.shared)
     }
diff --git a/Sources/OpenAI/Private/JSONRequest.swift b/Sources/OpenAI/Private/JSONRequest.swift
index 526f95c9..eb3c103e 100644
--- a/Sources/OpenAI/Private/JSONRequest.swift
+++ b/Sources/OpenAI/Private/JSONRequest.swift
@@ -25,10 +25,12 @@ final class JSONRequest<ResultType> {
 
 extension JSONRequest: URLRequestBuildable {
     
-    func build(token: String, organizationIdentifier: String?, timeoutInterval: TimeInterval) throws -> URLRequest {
+    func build(token: String?, organizationIdentifier: String?, timeoutInterval: TimeInterval) throws -> URLRequest {
         var request = URLRequest(url: url, timeoutInterval: timeoutInterval)
         request.setValue("application/json", forHTTPHeaderField: "Content-Type")
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
+        if let token {
+            request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
+        }
         if let organizationIdentifier {
             request.setValue(organizationIdentifier, forHTTPHeaderField: "OpenAI-Organization")
         }
diff --git a/Sources/OpenAI/Private/MultipartFormDataRequest.swift b/Sources/OpenAI/Private/MultipartFormDataRequest.swift
index 13764a58..89a85194 100644
--- a/Sources/OpenAI/Private/MultipartFormDataRequest.swift
+++ b/Sources/OpenAI/Private/MultipartFormDataRequest.swift
@@ -25,12 +25,14 @@ final class MultipartFormDataRequest<ResultType> {
 
 extension MultipartFormDataRequest: URLRequestBuildable {
     
-    func build(token: String, organizationIdentifier: String?, timeoutInterval: TimeInterval) throws -> URLRequest {
+    func build(token: String?, organizationIdentifier: String?, timeoutInterval: TimeInterval) throws -> URLRequest {
         var request = URLRequest(url: url)
         let boundary: String = UUID().uuidString
         request.timeoutInterval = timeoutInterval
         request.httpMethod = method
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
+        if let token {
+            request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
+        }
         request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
         if let organizationIdentifier {
             request.setValue(organizationIdentifier, forHTTPHeaderField: "OpenAI-Organization")
diff --git a/Sources/OpenAI/Private/URLRequestBuildable.swift b/Sources/OpenAI/Private/URLRequestBuildable.swift
index a10f3109..486b8c6e 100644
--- a/Sources/OpenAI/Private/URLRequestBuildable.swift
+++ b/Sources/OpenAI/Private/URLRequestBuildable.swift
@@ -14,5 +14,5 @@ protocol URLRequestBuildable {
     
     associatedtype ResultType
     
-    func build(token: String, organizationIdentifier: String?, timeoutInterval: TimeInterval) throws -> URLRequest
+    func build(token: String?, organizationIdentifier: String?, timeoutInterval: TimeInterval) throws -> URLRequest
 }