From 07feab1ce78bf2c9400314487073d63518d40e1e Mon Sep 17 00:00:00 2001
From: ainopara <ainopara@gmail.com>
Date: Tue, 21 Apr 2026 14:18:40 +0800
Subject: [PATCH] Allow empty API keys for custom OpenAI endpoints

---
 .../Models/Providers/OpenAIProvider.swift     | 24 +++++++++++--------
 .../Views/Settings/SettingsView.swift         |  5 +++-
 2 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/macOS/WritingTools/Models/Providers/OpenAIProvider.swift b/macOS/WritingTools/Models/Providers/OpenAIProvider.swift
index f1fc3044..6159ec97 100644
--- a/macOS/WritingTools/Models/Providers/OpenAIProvider.swift
+++ b/macOS/WritingTools/Models/Providers/OpenAIProvider.swift
@@ -44,15 +44,15 @@ final class OpenAIProvider: AIProvider {
             isProcessing = false
         }
 
-        guard !config.apiKey.isEmpty else {
-            throw NSError(domain: "OpenAIAPI", code: -1, userInfo: [NSLocalizedDescriptionKey: "API key is missing."])
-        }
-
         // Check for custom Base URL
         if !config.baseURL.isEmpty && config.baseURL != OpenAIConfig.defaultBaseURL {
             return try await Self.performCustomOpenAIRequest(config: config, systemPrompt: systemPrompt, userPrompt: userPrompt, images: images)
         }
 
+        guard !config.apiKey.isEmpty else {
+            throw NSError(domain: "OpenAIAPI", code: -1, userInfo: [NSLocalizedDescriptionKey: "API key is missing."])
+        }
+
         let baseURL = config.baseURL.isEmpty ? OpenAIConfig.defaultBaseURL : config.baseURL
         let openAIService = AIProxy.openAIDirectService(
             unprotectedAPIKey: config.apiKey,
@@ -141,7 +141,9 @@ final class OpenAIProvider: AIProvider {
         
         var request = URLRequest(url: url)
         request.httpMethod = "POST"
-        request.setValue("Bearer \(config.apiKey)", forHTTPHeaderField: "Authorization")
+        if !config.apiKey.isEmpty {
+            request.setValue("Bearer \(config.apiKey)", forHTTPHeaderField: "Authorization")
+        }
         request.setValue("application/json", forHTTPHeaderField: "Content-Type")
         request.timeoutInterval = 60
         
@@ -236,7 +238,9 @@ final class OpenAIProvider: AIProvider {
         
         var request = URLRequest(url: url)
         request.httpMethod = "POST"
-        request.setValue("Bearer \(config.apiKey)", forHTTPHeaderField: "Authorization")
+        if !config.apiKey.isEmpty {
+            request.setValue("Bearer \(config.apiKey)", forHTTPHeaderField: "Authorization")
+        }
         request.setValue("application/json", forHTTPHeaderField: "Content-Type")
         request.timeoutInterval = 60
         
@@ -318,10 +322,6 @@ final class OpenAIProvider: AIProvider {
             activeTask = nil
         }
         
-        guard !config.apiKey.isEmpty else {
-            throw NSError(domain: "OpenAIAPI", code: -1, userInfo: [NSLocalizedDescriptionKey: "API key is missing."])
-        }
-        
         // For custom base URLs, use manual SSE streaming
         if !config.baseURL.isEmpty && config.baseURL != OpenAIConfig.defaultBaseURL {
             let config = self.config
@@ -338,6 +338,10 @@ final class OpenAIProvider: AIProvider {
             try await streamTask.value
             return
         }
+
+        guard !config.apiKey.isEmpty else {
+            throw NSError(domain: "OpenAIAPI", code: -1, userInfo: [NSLocalizedDescriptionKey: "API key is missing."])
+        }
         
         let baseURL = config.baseURL.isEmpty ? OpenAIConfig.defaultBaseURL : config.baseURL
         let openAIService = AIProxy.openAIDirectService(
diff --git a/macOS/WritingTools/Views/Settings/SettingsView.swift b/macOS/WritingTools/Views/Settings/SettingsView.swift
index 26b73b81..e623c26b 100644
--- a/macOS/WritingTools/Views/Settings/SettingsView.swift
+++ b/macOS/WritingTools/Views/Settings/SettingsView.swift
@@ -260,7 +260,10 @@ struct SettingsView: View {
                 return "Custom OpenRouter model name is required."
             }
         case "openai":
-            if settings.openAIApiKey.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
+            let trimmedOpenAIBaseURL = settings.openAIBaseURL.trimmingCharacters(in: .whitespacesAndNewlines)
+            let isUsingDefaultOpenAIEndpoint = trimmedOpenAIBaseURL.isEmpty || trimmedOpenAIBaseURL == OpenAIConfig.defaultBaseURL
+            if isUsingDefaultOpenAIEndpoint &&
+                settings.openAIApiKey.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
                 return "OpenAI API key is required."
             }
             if settings.openAIModel.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {