diff --git a/archon-ui-main/src/components/bug-report/BugReportModal.tsx b/archon-ui-main/src/components/bug-report/BugReportModal.tsx
index 0ef34a66..69b40262 100644
--- a/archon-ui-main/src/components/bug-report/BugReportModal.tsx
+++ b/archon-ui-main/src/components/bug-report/BugReportModal.tsx
@@ -11,6 +11,7 @@ import {
   BugContext,
   BugReportData,
 } from "../../services/bugReportService";
+import { copyToClipboard } from "../../features/shared/utils/clipboard";
 
 interface BugReportModalProps {
   isOpen: boolean;
@@ -99,13 +100,21 @@ export const BugReportModal: React.FC<BugReportModalProps> = ({
         // Fallback: copy to clipboard
         const formattedReport =
           bugReportService.formatReportForClipboard(bugReportData);
-        await navigator.clipboard.writeText(formattedReport);
+        const clipboardResult = await copyToClipboard(formattedReport);
 
-        showToast(
-          "Failed to create GitHub issue, but bug report was copied to clipboard. Please paste it in a new GitHub issue.",
-          "warning",
-          10000,
-        );
+        if (clipboardResult.success) {
+          showToast(
+            "Failed to create GitHub issue, but bug report was copied to clipboard. Please paste it in a new GitHub issue.",
+            "warning",
+            10000,
+          );
+        } else {
+          showToast(
+            "Failed to create GitHub issue and could not copy to clipboard. Please report manually.",
+            "error",
+            10000,
+          );
+        }
       }
     } catch (error) {
       console.error("Bug report submission failed:", error);
@@ -118,15 +127,15 @@ export const BugReportModal: React.FC<BugReportModalProps> = ({
     }
   };
 
-  const copyToClipboard = async () => {
+  const handleCopyToClipboard = async () => {
     const bugReportData: BugReportData = { ...report, context };
     const formattedReport =
       bugReportService.formatReportForClipboard(bugReportData);
 
-    try {
-      await navigator.clipboard.writeText(formattedReport);
+    const result = await copyToClipboard(formattedReport);
+    if (result.success) {
       showToast("Bug report copied to clipboard", "success");
-    } catch {
+    } else {
       showToast("Failed to copy to clipboard", "error");
     }
   };
@@ -372,7 +381,7 @@ export const BugReportModal: React.FC<BugReportModalProps> = ({
                   <Button
                     type="button"
                     variant="ghost"
-                    onClick={copyToClipboard}
+                    onClick={handleCopyToClipboard}
                     className="sm:order-1"
                   >
                     <Copy className="w-4 h-4 mr-2" />
diff --git a/archon-ui-main/src/components/code/CodeViewerModal.tsx b/archon-ui-main/src/components/code/CodeViewerModal.tsx
index e17874a1..bbf9d7ef 100644
--- a/archon-ui-main/src/components/code/CodeViewerModal.tsx
+++ b/archon-ui-main/src/components/code/CodeViewerModal.tsx
@@ -30,6 +30,7 @@ import 'prismjs/components/prism-graphql'
 import 'prismjs/themes/prism-tomorrow.css'
 import { Button } from '../ui/Button'
 import { Badge } from '../ui/Badge'
+import { copyToClipboard } from '../../features/shared/utils/clipboard'
 
 export interface CodeExample {
   id: string
@@ -102,11 +103,15 @@ export const CodeViewerModal: React.FC<CodeViewerModalProps> = ({
     setActiveExampleIndex(0)
   }, [searchQuery])
 
-  const handleCopyCode = () => {
+  const handleCopyCode = async () => {
     if (activeExample) {
-      navigator.clipboard.writeText(activeExample.code)
-      setCopied(true)
-      setTimeout(() => setCopied(false), 2000)
+      const result = await copyToClipboard(activeExample.code)
+      if (result.success) {
+        setCopied(true)
+        setTimeout(() => setCopied(false), 2000)
+      } else {
+        console.error('Failed to copy to clipboard:', result.error)
+      }
     }
   }
 
diff --git a/archon-ui-main/src/components/settings/ButtonPlayground.tsx b/archon-ui-main/src/components/settings/ButtonPlayground.tsx
index 8837a9cd..caa32cb7 100644
--- a/archon-ui-main/src/components/settings/ButtonPlayground.tsx
+++ b/archon-ui-main/src/components/settings/ButtonPlayground.tsx
@@ -3,6 +3,7 @@ import { Copy, Check, Link, Unlink } from 'lucide-react';
 import { NeonButton, type CornerRadius, type GlowIntensity, type ColorOption } from '../ui/NeonButton';
 import { motion } from 'framer-motion';
 import { cn } from '../../lib/utils';
+import { copyToClipboard } from '../../features/shared/utils/clipboard';
 
 export const ButtonPlayground: React.FC = () => {
   const [showLayer2, setShowLayer2] = useState(true);
@@ -279,10 +280,14 @@ export const ButtonPlayground: React.FC = () => {
     return colors[color];
   };
 
-  const copyToClipboard = () => {
-    navigator.clipboard.writeText(generateCSS());
-    setCopied(true);
-    setTimeout(() => setCopied(false), 2000);
+  const handleCopyToClipboard = async () => {
+    const result = await copyToClipboard(generateCSS());
+    if (result.success) {
+      setCopied(true);
+      setTimeout(() => setCopied(false), 2000);
+    } else {
+      console.error('Failed to copy to clipboard:', result.error);
+    }
   };
 
   // Corner input component
@@ -654,7 +659,7 @@ export const ButtonPlayground: React.FC = () => {
           <div className="p-6 border-b border-gray-200 dark:border-gray-700 flex items-center justify-between">
             <h3 className="text-lg font-semibold text-gray-800 dark:text-white">CSS Styles</h3>
             <button
-              onClick={copyToClipboard}
+              onClick={handleCopyToClipboard}
               className="px-4 py-2 bg-purple-600 hover:bg-purple-700 text-white rounded-lg transition-colors flex items-center gap-2 shadow-lg shadow-purple-600/25"
             >
               {copied ? <Check className="w-4 h-4" /> : <Copy className="w-4 h-4" />}
diff --git a/archon-ui-main/src/components/settings/IDEGlobalRules.tsx b/archon-ui-main/src/components/settings/IDEGlobalRules.tsx
index 9cdfc30a..0f99e4dd 100644
--- a/archon-ui-main/src/components/settings/IDEGlobalRules.tsx
+++ b/archon-ui-main/src/components/settings/IDEGlobalRules.tsx
@@ -3,6 +3,7 @@ import { FileCode, Copy, Check } from 'lucide-react';
 import { Card } from '../ui/Card';
 import { Button } from '../ui/Button';
 import { useToast } from '../../features/ui/hooks/useToast';
+import { copyToClipboard } from '../../features/shared/utils/clipboard';
 
 type RuleType = 'claude' | 'universal';
 
@@ -472,8 +473,9 @@ archon:manage_task(
   };
 
   const handleCopyToClipboard = async () => {
-    try {
-      await navigator.clipboard.writeText(currentRules);
+    const result = await copyToClipboard(currentRules);
+    
+    if (result.success) {
       setCopied(true);
       showToast(`${selectedRuleType === 'claude' ? 'Claude Code' : 'Universal'} rules copied to clipboard!`, 'success');
       
@@ -481,8 +483,8 @@ archon:manage_task(
       setTimeout(() => {
         setCopied(false);
       }, 2000);
-    } catch (err) {
-      console.error('Failed to copy text: ', err);
+    } else {
+      console.error('Failed to copy text:', result.error);
       showToast('Failed to copy to clipboard', 'error');
     }
   };
diff --git a/archon-ui-main/src/config/api.ts b/archon-ui-main/src/config/api.ts
index f04a3ade..018d9c2e 100644
--- a/archon-ui-main/src/config/api.ts
+++ b/archon-ui-main/src/config/api.ts
@@ -5,29 +5,17 @@
  * and handles different environments (development, Docker, production)
  */
 
-// Get the API URL from environment or construct it
+// Get the API URL from environment or use relative URLs for proxy
 export function getApiUrl(): string {
-  // For relative URLs in production (goes through proxy)
-  if (import.meta.env.PROD) {
-    return '';
+  // Check if VITE_API_URL is explicitly provided (for absolute URL mode)
+  const viteApiUrl = (import.meta.env as any).VITE_API_URL as string | undefined;
+  if (viteApiUrl) {
+    return viteApiUrl;
   }
 
-  // Check if VITE_API_URL is provided (set by docker-compose)
-  if (import.meta.env.VITE_API_URL) {
-    return import.meta.env.VITE_API_URL;
-  }
-
-  // For development, construct from window location
-  const protocol = window.location.protocol;
-  const host = window.location.hostname;
-  // Use configured port or default to 8181
-  const port = import.meta.env.VITE_ARCHON_SERVER_PORT || '8181';
-  
-  if (!import.meta.env.VITE_ARCHON_SERVER_PORT) {
-    console.info('[Archon] Using default ARCHON_SERVER_PORT: 8181');
-  }
-  
-  return `${protocol}//${host}:${port}`;
+  // Default to relative URLs to use Vite proxy in development
+  // or direct proxy in production - this ensures all requests go through proxy
+  return '';
 }
 
 // Get the base path for API endpoints
diff --git a/archon-ui-main/src/features/knowledge/inspector/components/KnowledgeInspector.tsx b/archon-ui-main/src/features/knowledge/inspector/components/KnowledgeInspector.tsx
index 58afc931..69e8f050 100644
--- a/archon-ui-main/src/features/knowledge/inspector/components/KnowledgeInspector.tsx
+++ b/archon-ui-main/src/features/knowledge/inspector/components/KnowledgeInspector.tsx
@@ -10,6 +10,7 @@ import { useInspectorPagination } from "../hooks/useInspectorPagination";
 import { ContentViewer } from "./ContentViewer";
 import { InspectorHeader } from "./InspectorHeader";
 import { InspectorSidebar } from "./InspectorSidebar";
+import { copyToClipboard } from "../../../shared/utils/clipboard";
 
 interface KnowledgeInspectorProps {
   item: KnowledgeItem;
@@ -92,12 +93,12 @@ export const KnowledgeInspector: React.FC<KnowledgeInspectorProps> = ({
   }, [viewMode, currentItems, selectedItem]);
 
   const handleCopy = useCallback(async (text: string, id: string) => {
-    try {
-      await navigator.clipboard.writeText(text);
+    const result = await copyToClipboard(text);
+    if (result.success) {
       setCopiedId(id);
       setTimeout(() => setCopiedId((v) => (v === id ? null : v)), 2000);
-    } catch (error) {
-      console.error("Failed to copy to clipboard:", error);
+    } else {
+      console.error("Failed to copy to clipboard:", result.error);
     }
   }, []);
 
diff --git a/archon-ui-main/src/features/mcp/components/McpConfigSection.tsx b/archon-ui-main/src/features/mcp/components/McpConfigSection.tsx
index 1f3cd17b..c98821e7 100644
--- a/archon-ui-main/src/features/mcp/components/McpConfigSection.tsx
+++ b/archon-ui-main/src/features/mcp/components/McpConfigSection.tsx
@@ -4,6 +4,7 @@ import { useState } from "react";
 import { useToast } from "../../ui/hooks";
 import { Button, cn, glassmorphism, Tabs, TabsContent, TabsList, TabsTrigger } from "../../ui/primitives";
 import type { McpServerConfig, McpServerStatus, SupportedIDE } from "../types";
+import { copyToClipboard } from "../../shared/utils/clipboard";
 
 interface McpConfigSectionProps {
   config?: McpServerConfig;
@@ -185,10 +186,16 @@ export const McpConfigSection: React.FC<McpConfigSectionProps> = ({ config, stat
     );
   }
 
-  const handleCopyConfig = () => {
+  const handleCopyConfig = async () => {
     const configText = ideConfigurations[selectedIDE].configGenerator(config);
-    navigator.clipboard.writeText(configText);
-    showToast("Configuration copied to clipboard", "success");
+    const result = await copyToClipboard(configText);
+    
+    if (result.success) {
+      showToast("Configuration copied to clipboard", "success");
+    } else {
+      console.error("Failed to copy config:", result.error);
+      showToast("Failed to copy configuration", "error");
+    }
   };
 
   const handleCursorOneClick = () => {
@@ -202,10 +209,16 @@ export const McpConfigSection: React.FC<McpConfigSectionProps> = ({ config, stat
     showToast("Opening Cursor with Archon MCP configuration...", "info");
   };
 
-  const handleClaudeCodeCommand = () => {
+  const handleClaudeCodeCommand = async () => {
     const command = `claude mcp add --transport http archon http://${config.host}:${config.port}/mcp`;
-    navigator.clipboard.writeText(command);
-    showToast("Command copied to clipboard", "success");
+    const result = await copyToClipboard(command);
+    
+    if (result.success) {
+      showToast("Command copied to clipboard", "success");
+    } else {
+      console.error("Failed to copy command:", result.error);
+      showToast("Failed to copy command", "error");
+    }
   };
 
   const selectedConfig = ideConfigurations[selectedIDE];
diff --git a/archon-ui-main/src/features/projects/documents/components/DocumentCard.tsx b/archon-ui-main/src/features/projects/documents/components/DocumentCard.tsx
index 866f2e4e..25b12365 100644
--- a/archon-ui-main/src/features/projects/documents/components/DocumentCard.tsx
+++ b/archon-ui-main/src/features/projects/documents/components/DocumentCard.tsx
@@ -15,6 +15,7 @@ import type React from "react";
 import { memo, useCallback, useState } from "react";
 import { Button } from "../../../ui/primitives";
 import type { DocumentCardProps, DocumentType } from "../types";
+import { copyToClipboard } from "../../../shared/utils/clipboard";
 
 const getDocumentIcon = (type?: DocumentType) => {
   switch (type) {
@@ -67,11 +68,13 @@ export const DocumentCard = memo(({ document, isActive, onSelect, onDelete }: Do
   const [isCopied, setIsCopied] = useState(false);
 
   const handleCopyId = useCallback(
-    (e: React.MouseEvent) => {
+    async (e: React.MouseEvent) => {
       e.stopPropagation();
-      navigator.clipboard.writeText(document.id);
-      setIsCopied(true);
-      setTimeout(() => setIsCopied(false), 2000);
+      const result = await copyToClipboard(document.id);
+      if (result.success) {
+        setIsCopied(true);
+        setTimeout(() => setIsCopied(false), 2000);
+      }
     },
     [document.id],
   );
diff --git a/archon-ui-main/src/features/shared/utils/clipboard.ts b/archon-ui-main/src/features/shared/utils/clipboard.ts
new file mode 100644
index 00000000..b7052bb7
--- /dev/null
+++ b/archon-ui-main/src/features/shared/utils/clipboard.ts
@@ -0,0 +1,139 @@
+/**
+ * Universal clipboard utility with modern API and fallback support
+ * Handles various security contexts and browser compatibility issues
+ */
+
+export interface ClipboardResult {
+  success: boolean;
+  method: 'clipboard-api' | 'execCommand' | 'failed';
+  error?: string;
+}
+
+/**
+ * Copy text to clipboard with automatic fallback mechanisms
+ * @param text - Text to copy to clipboard
+ * @returns Promise<ClipboardResult> - Result of the copy operation
+ */
+export const copyToClipboard = async (text: string): Promise<ClipboardResult> => {
+  // Try modern clipboard API first with SSR-safe guards
+  if (
+    typeof navigator !== 'undefined' &&
+    navigator.clipboard &&
+    navigator.clipboard.writeText
+  ) {
+    try {
+      await navigator.clipboard.writeText(text);
+      return { success: true, method: 'clipboard-api' };
+    } catch (error) {
+      console.warn('Clipboard API failed, trying fallback:', error);
+    }
+  }
+
+  // Fallback to document.execCommand for older browsers or insecure contexts
+  // Add SSR guards for document access
+  if (typeof document === 'undefined') {
+    return {
+      success: false,
+      method: 'failed',
+      error: 'Running in server-side environment - clipboard not available'
+    };
+  }
+
+  let textarea: HTMLTextAreaElement | null = null;
+  try {
+    // Ensure document.body exists before proceeding
+    if (!document.body) {
+      return {
+        success: false,
+        method: 'failed',
+        error: 'document.body is not available'
+      };
+    }
+
+    textarea = document.createElement('textarea');
+    textarea.value = text;
+    textarea.style.position = 'fixed';
+    textarea.style.top = '-9999px';
+    textarea.style.left = '-9999px';
+    textarea.style.opacity = '0';
+    textarea.style.pointerEvents = 'none';
+    textarea.setAttribute('readonly', '');
+    textarea.setAttribute('aria-hidden', 'true');
+
+    document.body.appendChild(textarea);
+    textarea.select();
+    textarea.setSelectionRange(0, text.length);
+
+    const success = document.execCommand('copy');
+
+    if (success) {
+      return { success: true, method: 'execCommand' };
+    } else {
+      return {
+        success: false,
+        method: 'failed',
+        error: 'execCommand copy returned false'
+      };
+    }
+  } catch (error) {
+    return {
+      success: false,
+      method: 'failed',
+      error: error instanceof Error ? error.message : 'Unknown error'
+    };
+  } finally {
+    // Always clean up the textarea element if it was created and added to DOM
+    if (textarea && document.body && document.body.contains(textarea)) {
+      try {
+        document.body.removeChild(textarea);
+      } catch (cleanupError) {
+        // Ignore cleanup errors - element may have already been removed
+        console.warn('Failed to cleanup textarea element:', cleanupError);
+      }
+    }
+  }
+};
+
+/**
+ * Check if clipboard functionality is supported in current context
+ * @returns boolean - True if any clipboard method is available
+ */
+export const isClipboardSupported = (): boolean => {
+  // Check modern clipboard API with proper SSR guards
+  if (
+    typeof navigator !== 'undefined' &&
+    typeof navigator.clipboard !== 'undefined' &&
+    typeof navigator.clipboard.writeText === 'function'
+  ) {
+    return true;
+  }
+
+  // Check execCommand fallback with SSR guards
+  if (
+    typeof document !== 'undefined' &&
+    typeof document.queryCommandSupported === 'function'
+  ) {
+    try {
+      return document.queryCommandSupported('copy');
+    } catch {
+      return false;
+    }
+  }
+
+  // Return false if running in SSR or globals are unavailable
+  return false;
+};
+
+/**
+ * Get current security context information for debugging
+ * @returns string - Description of current security context
+ */
+export const getSecurityContext = (): string => {
+  if (typeof window === 'undefined') return 'server';
+  if (window.isSecureContext) return 'secure';
+  if (window.location.protocol === 'https:') return 'https';
+  if (window.location.hostname === 'localhost' || 
+      window.location.hostname === '127.0.0.1') return 'localhost';
+  return 'insecure';
+};
+
diff --git a/docker-compose.yml b/docker-compose.yml
index cd53aeaa..a090a473 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -28,6 +28,7 @@ services:
       - ARCHON_MCP_PORT=${ARCHON_MCP_PORT:-8051}
       - ARCHON_AGENTS_PORT=${ARCHON_AGENTS_PORT:-8052}
       - AGENTS_ENABLED=${AGENTS_ENABLED:-false}
+      - ARCHON_HOST=${HOST:-localhost}
     networks:
       - app-network
     volumes:
diff --git a/python/src/server/api_routes/mcp_api.py b/python/src/server/api_routes/mcp_api.py
index 6d32e355..5c9c605d 100644
--- a/python/src/server/api_routes/mcp_api.py
+++ b/python/src/server/api_routes/mcp_api.py
@@ -109,7 +109,7 @@ async def get_mcp_config():
 
             # Configuration for streamable-http mode with actual port
             config = {
-                "host": "localhost",
+                "host": os.getenv("ARCHON_HOST", "localhost"),
                 "port": mcp_port,
                 "transport": "streamable-http",
             }