diff --git a/src/simpleguardhome/adguard.py b/src/simpleguardhome/adguard.py
index aaf9e75..b8ef86e 100644
--- a/src/simpleguardhome/adguard.py
+++ b/src/simpleguardhome/adguard.py
@@ -20,55 +20,41 @@ class AdGuardAPIError(AdGuardError):
     """Raised when AdGuard Home API returns an error."""
     pass
 
-# Response models matching AdGuard Home API spec
+class ResultRule(BaseModel):
+    """Rule detail according to AdGuard spec."""
+    filter_list_id: Optional[int] = Field(None, description="Filter list ID")
+    text: Optional[str] = Field(None, description="Rule text")
+
+class FilterCheckHostResponse(BaseModel):
+    """Response model for check_host endpoint according to AdGuard spec."""
+    reason: str = Field(..., description="Request filtering status")
+    filter_id: Optional[int] = Field(None, deprecated=True)
+    rule: Optional[str] = Field(None, deprecated=True)
+    rules: Optional[List[ResultRule]] = Field(None, description="Applied rules")
+    service_name: Optional[str] = Field(None, description="Blocked service name")
+    cname: Optional[str] = Field(None, description="CNAME value if rewritten")
+    ip_addrs: Optional[List[str]] = Field(None, description="IP addresses if rewritten")
+
 class Filter(BaseModel):
     """Filter subscription info according to AdGuard spec."""
     enabled: bool
-    id: int = Field(..., description="Filter ID", example=1234)
-    name: str = Field(..., example="AdGuard Simplified Domain Names filter")
-    rules_count: int = Field(..., description="Number of rules in filter", example=5912)
-    url: str = Field(..., example="https://adguardteam.github.io/AdGuardSDNSFilter/Filters/filter.txt")
-    last_updated: Optional[str] = Field(None, example="2018-10-30T12:18:57+03:00")
+    id: int = Field(..., description="Filter ID")
+    name: str = Field(..., description="Filter name")
+    rules_count: int = Field(..., description="Number of rules")
+    url: str = Field(..., description="Filter URL")
+    last_updated: Optional[str] = None
 
 class FilterStatus(BaseModel):
     """Filtering settings according to AdGuard spec."""
-    enabled: bool = Field(..., description="Whether filtering is enabled")
-    interval: Optional[int] = Field(None, description="Update interval in hours")
+    enabled: bool
+    interval: Optional[int] = None
     filters: List[Filter] = Field(default_factory=list)
     whitelist_filters: List[Filter] = Field(default_factory=list)
     user_rules: List[str] = Field(default_factory=list)
 
-class DnsAnswer(BaseModel):
-    """DNS answer section according to AdGuard spec."""
-    ttl: int = Field(..., description="Time to live")
-    type: str = Field(..., description="Record type", example="A")
-    value: str = Field(..., description="Record value", example="217.69.139.201")
-
-class DomainCheckResult(BaseModel):
-    """Response model for check_host endpoint according to AdGuard spec."""
-    reason: str = Field(
-        ...,
-        description="Request filtering status",
-        enum=[
-            "NotFilteredNotFound",
-            "NotFilteredWhiteList",
-            "NotFilteredError",
-            "FilteredBlackList",
-            "FilteredSafeBrowsing",
-            "FilteredParental",
-            "FilteredInvalid",
-            "FilteredSafeSearch",
-            "FilteredBlockedService",
-            "Rewrite",
-            "RewriteEtcHosts",
-            "RewriteRule"
-        ]
-    )
-    filter_id: Optional[int] = Field(None, description="ID of the filter list containing the rule")
-    rule: Optional[str] = Field(None, description="Applied filtering rule")
-    service_name: Optional[str] = Field(None, description="Blocked service name if applicable")
-    cname: Optional[str] = Field(None, description="CNAME value if rewritten")
-    ip_addrs: Optional[List[str]] = Field(None, description="IP addresses if rewritten")
+class SetRulesRequest(BaseModel):
+    """Request model for set_rules endpoint according to AdGuard spec."""
+    rules: List[str] = Field(..., description="List of filtering rules")
 
 class AdGuardClient:
     """Client for interacting with AdGuard Home API according to OpenAPI spec."""
@@ -90,15 +76,7 @@ class AdGuardClient:
         logger.info(f"Initialized AdGuard Home client with base URL: {self.base_url}")
 
     async def login(self) -> bool:
-        """Authenticate with AdGuard Home and get session cookie.
-        
-        Returns:
-            bool: True if authentication successful
-            
-        Raises:
-            AdGuardConnectionError: If connection to AdGuard Home fails
-            AdGuardAPIError: If authentication fails
-        """
+        """Authenticate with AdGuard Home and get session cookie."""
         if not self._auth:
             logger.warning("No credentials configured, skipping authentication")
             return False
@@ -134,19 +112,8 @@ class AdGuardClient:
         if not self._session_cookie:
             await self.login()
     
-    async def check_domain(self, domain: str) -> DomainCheckResult:
-        """Check if a domain is blocked by AdGuard Home.
-        
-        Args:
-            domain: The domain to check
-            
-        Returns:
-            DomainCheckResult according to AdGuard spec
-            
-        Raises:
-            AdGuardConnectionError: If connection to AdGuard Home fails
-            AdGuardAPIError: If AdGuard Home API returns an error
-        """
+    async def check_domain(self, domain: str) -> FilterCheckHostResponse:
+        """Check if a domain is blocked by AdGuard Home according to spec."""
         await self._ensure_authenticated()
         url = f"{self.base_url}/filtering/check_host"
         params = {"name": domain}
@@ -169,7 +136,7 @@ class AdGuardClient:
             response.raise_for_status()
             result = response.json()
             logger.info(f"Domain check result for {domain}: {result}")
-            return DomainCheckResult(**result)
+            return FilterCheckHostResponse(**result)
             
         except httpx.ConnectError as e:
             logger.error(f"Connection error while checking domain {domain}: {str(e)}")
@@ -181,16 +148,44 @@ class AdGuardClient:
             logger.error(f"Unexpected error while checking domain {domain}: {str(e)}")
             raise AdGuardError(f"Unexpected error: {str(e)}")
     
-    async def get_filter_status(self) -> FilterStatus:
-        """Get the current filtering status.
+    async def add_allowed_domain(self, domain: str) -> bool:
+        """Add a domain to the allowed list using set_rules endpoint according to spec."""
+        await self._ensure_authenticated()
+        url = f"{self.base_url}/filtering/set_rules"
+        # Add as a whitelist rule according to AdGuard format
+        data = {"rules": [f"@@||{domain}^"]}
+        headers = {}
         
-        Returns:
-            FilterStatus according to AdGuard spec
+        if self._session_cookie:
+            headers['Cookie'] = f'agh_session={self._session_cookie}'
+        
+        try:
+            logger.info(f"Adding domain to whitelist: {domain}")
+            response = await self.client.post(url, json=data, headers=headers)
             
-        Raises:
-            AdGuardConnectionError: If connection to AdGuard Home fails
-            AdGuardAPIError: If AdGuard Home API returns an error
-        """
+            if response.status_code == 401:
+                logger.info("Session expired, attempting reauth")
+                await self.login()
+                if self._session_cookie:
+                    headers['Cookie'] = f'agh_session={self._session_cookie}'
+                response = await self.client.post(url, json=data, headers=headers)
+            
+            response.raise_for_status()
+            logger.info(f"Successfully added {domain} to whitelist")
+            return True
+            
+        except httpx.ConnectError as e:
+            logger.error(f"Connection error while whitelisting domain {domain}: {str(e)}")
+            raise AdGuardConnectionError(f"Failed to connect to AdGuard Home: {str(e)}")
+        except httpx.HTTPError as e:
+            logger.error(f"HTTP error while whitelisting domain {domain}: {str(e)}")
+            raise AdGuardAPIError(f"AdGuard Home API error: {str(e)}")
+        except Exception as e:
+            logger.error(f"Unexpected error while whitelisting domain {domain}: {str(e)}")
+            raise AdGuardError(f"Unexpected error: {str(e)}")
+
+    async def get_filter_status(self) -> FilterStatus:
+        """Get the current filtering status according to spec."""
         await self._ensure_authenticated()
         url = f"{self.base_url}/filtering/status"
         headers = {}
@@ -224,52 +219,6 @@ class AdGuardClient:
             logger.error(f"Unexpected error while getting filter status: {str(e)}")
             raise AdGuardError(f"Unexpected error: {str(e)}")
     
-    async def add_allowed_domain(self, domain: str) -> bool:
-        """Add a domain to the allowed list according to AdGuard spec.
-        
-        Args:
-            domain: The domain to allow
-            
-        Returns:
-            bool: True if successful
-            
-        Raises:
-            AdGuardConnectionError: If connection to AdGuard Home fails
-            AdGuardAPIError: If AdGuard Home API returns an error
-        """
-        await self._ensure_authenticated()
-        url = f"{self.base_url}/filtering/whitelist/add"
-        data = {"name": domain}
-        headers = {}
-        
-        if self._session_cookie:
-            headers['Cookie'] = f'agh_session={self._session_cookie}'
-        
-        try:
-            logger.info(f"Adding domain to whitelist: {domain}")
-            response = await self.client.post(url, json=data, headers=headers)
-            
-            if response.status_code == 401:
-                logger.info("Session expired, attempting reauth")
-                await self.login()
-                if self._session_cookie:
-                    headers['Cookie'] = f'agh_session={self._session_cookie}'
-                response = await self.client.post(url, json=data, headers=headers)
-            
-            response.raise_for_status()
-            logger.info(f"Successfully added {domain} to whitelist")
-            return True
-            
-        except httpx.ConnectError as e:
-            logger.error(f"Connection error while whitelisting domain {domain}: {str(e)}")
-            raise AdGuardConnectionError(f"Failed to connect to AdGuard Home: {str(e)}")
-        except httpx.HTTPError as e:
-            logger.error(f"HTTP error while whitelisting domain {domain}: {str(e)}")
-            raise AdGuardAPIError(f"AdGuard Home API error: {str(e)}")
-        except Exception as e:
-            logger.error(f"Unexpected error while whitelisting domain {domain}: {str(e)}")
-            raise AdGuardError(f"Unexpected error: {str(e)}")
-    
     async def close(self):
         """Close the HTTP client."""
         await self.client.aclose()
diff --git a/src/simpleguardhome/main.py b/src/simpleguardhome/main.py
index ccbbe7d..7c30a3f 100644
--- a/src/simpleguardhome/main.py
+++ b/src/simpleguardhome/main.py
@@ -13,23 +13,24 @@ from .adguard import (
     AdGuardError,
     AdGuardConnectionError,
     AdGuardAPIError,
-    DomainCheckResult,
-    FilterStatus
+    FilterStatus,
+    FilterCheckHostResponse,
+    SetRulesRequest
 )
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 
 # Configure logging
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
 
-# Initialize FastAPI app
+# Initialize API with proper OpenAPI info
 app = FastAPI(
     title="SimpleGuardHome",
     description="AdGuard Home REST API interface",
     version="1.0.0",
-    openapi_url="/api/openapi.json",
     docs_url="/api/docs",
-    redoc_url="/api/redoc"
+    redoc_url="/api/redoc",
+    openapi_url="/api/openapi.json"
 )
 
 # Add CORS middleware with security headers
@@ -46,12 +47,10 @@ app.add_middleware(
 templates_path = Path(__file__).parent / "templates"
 templates = Jinja2Templates(directory=str(templates_path))
 
-# Request/Response Models
-class DomainRequest(BaseModel):
-    name: str
-
+# Response models matching AdGuard spec
 class ErrorResponse(BaseModel):
-    message: str
+    """Error response model according to AdGuard spec."""
+    message: str = Field(..., description="The error message")
 
 @app.get("/", response_class=HTMLResponse)
 async def home(request: Request):
@@ -63,7 +62,7 @@ async def home(request: Request):
 
 @app.get(
     "/control/filtering/check_host",
-    response_model=DomainCheckResult,
+    response_model=FilterCheckHostResponse,
     responses={
         200: {"description": "OK"},
         400: {"description": "Bad Request", "model": ErrorResponse},
@@ -71,8 +70,8 @@ async def home(request: Request):
     },
     tags=["filtering"]
 )
-async def check_domain(name: str) -> Dict:
-    """Check if a domain is blocked by AdGuard Home using AdGuard spec."""
+async def check_domain(name: str) -> FilterCheckHostResponse:
+    """Check if a domain is blocked by AdGuard Home according to spec."""
     if not name:
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
@@ -90,7 +89,7 @@ async def check_domain(name: str) -> Dict:
         raise
 
 @app.post(
-    "/control/filtering/whitelist/add",
+    "/control/filtering/set_rules",
     response_model=Dict,
     responses={
         200: {"description": "OK"},
@@ -99,27 +98,27 @@ async def check_domain(name: str) -> Dict:
     },
     tags=["filtering"]
 )
-async def add_to_whitelist(request: DomainRequest) -> Dict:
-    """Add a domain to the allowed list using AdGuard spec."""
-    if not request.name:
+async def add_to_whitelist(request: SetRulesRequest) -> Dict:
+    """Add rules using set_rules endpoint according to AdGuard spec."""
+    if not request.rules:
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
-            detail="Domain name is required"
+            detail="Rules are required"
         )
     
-    logger.info(f"Adding domain to whitelist: {request.name}")
+    logger.info(f"Adding rules: {request.rules}")
     try:
         async with adguard.AdGuardClient() as client:
-            success = await client.add_allowed_domain(request.name)
+            success = await client.add_allowed_domain(request.rules[0].strip("@@||^"))
             if success:
-                return {"message": f"Successfully whitelisted {request.name}"}
+                return {"message": "Rules added successfully"}
             else:
                 raise HTTPException(
                     status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
-                    detail="Failed to whitelist domain"
+                    detail="Failed to add rules"
                 )
     except Exception as e:
-        logger.error(f"Error whitelisting domain {request.name}: {str(e)}")
+        logger.error(f"Error adding rules: {str(e)}")
         raise
 
 @app.get(
@@ -132,7 +131,7 @@ async def add_to_whitelist(request: DomainRequest) -> Dict:
     tags=["filtering"]
 )
 async def get_filtering_status() -> FilterStatus:
-    """Get the current filtering status using AdGuard spec."""
+    """Get filtering status according to AdGuard spec."""
     try:
         async with adguard.AdGuardClient() as client:
             return await client.get_filter_status()
diff --git a/src/simpleguardhome/templates/index.html b/src/simpleguardhome/templates/index.html
index 46f7901..acdd839 100644
--- a/src/simpleguardhome/templates/index.html
+++ b/src/simpleguardhome/templates/index.html
@@ -7,7 +7,7 @@
     <script src="https://cdn.tailwindcss.com"></script>
     <script>
         async function checkDomain(event) {
-            event.preventDefault(); // Important: prevent default form submission
+            event.preventDefault();
             const domain = document.getElementById('domain').value;
             const resultDiv = document.getElementById('result');
             const unblockDiv = document.getElementById('unblock-action');
@@ -28,13 +28,14 @@
                 const data = await response.json();
                 
                 if (response.ok) {
-                    if (data.reason.startsWith('Filtered')) {
+                    const isBlocked = data.reason.startsWith('Filtered');
+                    if (isBlocked) {
                         resultDiv.innerHTML = `
                             <div class="bg-red-100 border-l-4 border-red-500 text-red-700 p-4 mb-4">
                                 <p class="font-bold">Domain is blocked</p>
-                                <p class="text-sm"><strong>${domain}</strong> is blocked by rule:</p>
-                                <p class="text-sm font-mono bg-red-50 p-2 mt-1 rounded">${data.rule || 'No rule specified'}</p>
-                                ${data.filter_id ? `<p class="text-sm mt-2">Filter ID: ${data.filter_id}</p>` : ''}
+                                <p class="text-sm"><strong>${domain}</strong> is blocked</p>
+                                <p class="text-sm">Reason: ${data.reason}</p>
+                                ${data.rules?.length ? `<p class="text-sm font-mono bg-red-50 p-2 mt-1 rounded">Rule: ${data.rules[0].text}</p>` : ''}
                                 ${data.service_name ? `<p class="text-sm mt-2">Service: ${data.service_name}</p>` : ''}
                             </div>`;
                         unblockDiv.innerHTML = `
@@ -52,7 +53,6 @@
                         unblockDiv.innerHTML = '';
                     }
                 } else {
-                    // Show error message
                     resultDiv.innerHTML = `
                         <div class="bg-yellow-100 border-l-4 border-yellow-500 text-yellow-700 p-4">
                             <p class="font-bold">Error checking domain</p>
@@ -68,7 +68,6 @@
                     </div>`;
                 unblockDiv.innerHTML = '';
             } finally {
-                // Reset button state
                 submitBtn.disabled = false;
                 submitBtn.innerHTML = 'Check Domain';
             }
@@ -80,17 +79,18 @@
             const unblockBtn = unblockDiv.querySelector('button');
             
             try {
-                // Show loading state
                 unblockBtn.disabled = true;
                 unblockBtn.innerHTML = '<span class="inline-flex items-center">Unblocking... <svg class="animate-spin ml-2 h-5 w-5 text-white" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24"><circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle><path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path></svg></span>';
                 
-                const response = await fetch('/control/filtering/whitelist/add', {
+                const response = await fetch('/control/filtering/set_rules', {
                     method: 'POST',
                     headers: {
                         'Content-Type': 'application/json',
                         'Accept': 'application/json'
                     },
-                    body: JSON.stringify({ name: domain })
+                    body: JSON.stringify({
+                        rules: [`@@||${domain}^`]
+                    })
                 });
                 
                 if (response.ok) {
@@ -123,7 +123,6 @@
         <h1 class="text-3xl font-bold text-center mb-8 text-gray-800">SimpleGuardHome</h1>
         
         <div class="bg-white rounded-lg shadow-md p-6">
-            <!-- Remove form action to prevent default submission -->
             <form onsubmit="checkDomain(event)" class="mb-6">
                 <div class="mb-4">
                     <label for="domain" class="block text-gray-700 text-sm font-bold mb-2">