diff --git a/.env.local.example b/.env.local.example
index ec78d73..d081a52 100644
--- a/.env.local.example
+++ b/.env.local.example
@@ -119,3 +119,18 @@ NEXT_PUBLIC_REDDIT_PIXEL_ID=a2_iom6tk9tutrs
 # Get this from: https://ads.reddit.com → Settings → API
 # Format: Bearer token
 REDDIT_CONVERSIONS_API_TOKEN=your_reddit_api_token_here
+
+# =============================================================================
+# X ADS (TWITTER) - Pixel & Conversions API
+# =============================================================================
+# X Pixel ID (used in both client-side pixel and server-side Conversions API)
+# Get this from: https://ads.x.com → Events Manager → Your Pixel
+# Format: tw-xxxxx-xxxxxx (appears in pixel code)
+# NEXT_PUBLIC_ prefix required for browser access
+NEXT_PUBLIC_X_PIXEL_ID=r9lkr
+
+# X Conversions API Access Token (server-side only)
+# Get this from: https://ads.x.com → Events Manager → Your Pixel → Settings → Conversions API → Generate Access Token
+# Format: Long OAuth 2.0 Bearer token (e.g., AAAAAAAAAAAAAAAAAAAAAMLheAAAAAAA0%2BuSeid...)
+# IMPORTANT: This is different from your main X API token - it's specifically for Conversions API
+X_CONVERSIONS_API_TOKEN=your_x_api_token_here
diff --git a/README.md b/README.md
index 8ed38cb..3ec867e 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,11 @@ npm start
 - `NEXT_PUBLIC_REDDIT_PIXEL_ID`: Reddit Pixel ID for tracking conversions (client + server)
 - `REDDIT_CONVERSIONS_API_TOKEN`: Reddit Conversions API access token (server-side only)
 
+**X Ads (Optional):**
+- `NEXT_PUBLIC_X_PIXEL_ID`: X (Twitter) Pixel ID for tracking conversions (client + server)
+- `X_CONVERSIONS_API_TOKEN`: X Conversions API OAuth 2.0 access token (server-side only)
+  - Get from: X Ads Manager → Events Manager → Your Pixel → Settings → Conversions API → Generate Access Token
+
 See `.env.local.example` for complete configuration details.
 
 ### Database Schema
diff --git a/app/api/debug-env/route.ts b/app/api/debug-env/route.ts
new file mode 100644
index 0000000..bb1ce75
--- /dev/null
+++ b/app/api/debug-env/route.ts
@@ -0,0 +1,10 @@
+import { NextResponse } from 'next/server';
+
+export async function GET() {
+  return NextResponse.json({
+    X_PIXEL_ID: process.env.NEXT_PUBLIC_X_PIXEL_ID,
+    X_TOKEN_EXISTS: !!process.env.X_CONVERSIONS_API_TOKEN,
+    X_TOKEN_LENGTH: process.env.X_CONVERSIONS_API_TOKEN?.length || 0,
+    X_TOKEN_PREFIX: process.env.X_CONVERSIONS_API_TOKEN?.substring(0, 20) || 'MISSING',
+  });
+}
diff --git a/app/api/x-conversion/route.ts b/app/api/x-conversion/route.ts
new file mode 100644
index 0000000..0a334bc
--- /dev/null
+++ b/app/api/x-conversion/route.ts
@@ -0,0 +1,109 @@
+/**
+ * X (Twitter) Conversions API endpoint
+ *
+ * Server-side conversion tracking for X Ads
+ * Sends conversion events with match keys for improved attribution
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+
+export async function POST(request: NextRequest) {
+  try {
+    const { eventType, metadata } = await request.json();
+
+    // Get X API credentials from environment
+    const pixelId = process.env.NEXT_PUBLIC_X_PIXEL_ID;
+    const accessToken = process.env.X_CONVERSIONS_API_TOKEN;
+
+    // Debug: Log env var status
+    console.log('[X Conversion] Env check:', {
+      pixelId,
+      hasToken: !!accessToken,
+      tokenLength: accessToken?.length,
+    });
+
+    if (!pixelId || !accessToken) {
+      console.warn('[X Conversion] X API not configured');
+      return NextResponse.json(
+        { error: 'X Conversions API not configured' },
+        { status: 500 }
+      );
+    }
+
+    // Extract match keys from request
+    const ip = request.headers.get('x-forwarded-for')?.split(',')[0] ||
+               request.headers.get('x-real-ip') ||
+               'unknown';
+    const userAgent = request.headers.get('user-agent') || 'unknown';
+
+    // Build conversion event payload according to X API spec
+    const event: any = {
+      conversion_time: new Date().toISOString(),
+      event_id: metadata?.conversion_id || `${eventType}_${Date.now()}`,
+      identifiers: [],
+    };
+
+    // Add match keys (identifiers)
+    if (ip !== 'unknown') {
+      event.identifiers.push({
+        hashed_ip_address: ip, // X will hash this server-side
+      });
+    }
+
+    // Add conversion metadata
+    if (eventType === 'Purchase' && metadata?.value) {
+      event.conversion_value = metadata.value;
+      event.currency = metadata.currency || 'USD';
+    }
+
+    const payload = {
+      conversions: [
+        {
+          conversion_event: eventType,
+          ...event,
+        },
+      ],
+    };
+
+    // Debug logging
+    console.log('[X Conversion] Sending request:', {
+      url: `https://ads-api.x.com/12/measurement/conversions/${pixelId}`,
+      eventType,
+      hasAccessToken: !!accessToken,
+      accessTokenPrefix: accessToken.substring(0, 20) + '...',
+      payload: JSON.stringify(payload, null, 2),
+    });
+
+    // Send to X Conversions API
+    const response = await fetch(
+      `https://ads-api.x.com/12/measurement/conversions/${pixelId}`,
+      {
+        method: 'POST',
+        headers: {
+          'Authorization': `Bearer ${accessToken}`,
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify(payload),
+      }
+    );
+
+    if (!response.ok) {
+      const errorText = await response.text();
+      console.error('[X Conversion] API error:', response.status, errorText);
+      return NextResponse.json(
+        { error: 'Failed to send conversion event' },
+        { status: response.status }
+      );
+    }
+
+    const result = await response.json();
+    return NextResponse.json({ success: true, result });
+
+  } catch (error) {
+    console.error('[X Conversion] Error:', error);
+    return NextResponse.json(
+      { error: 'Internal server error' },
+      { status: 500 }
+    );
+  }
+}
diff --git a/app/layout.tsx b/app/layout.tsx
index 241eb28..185d6fa 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -83,6 +83,17 @@ export default function RootLayout({
             `}
           </Script>
         )}
+        {/* X (Twitter) Pixel */}
+        {process.env.NEXT_PUBLIC_X_PIXEL_ID && (
+          <Script id="x-pixel" strategy="afterInteractive">
+            {`
+              !function(e,t,n,s,u,a){e.twq||(s=e.twq=function(){s.exe?s.exe.apply(s,arguments):s.queue.push(arguments);
+              },s.version='1.1',s.queue=[],u=t.createElement(n),u.async=!0,u.src='https://static.ads-twitter.com/uwt.js',
+              a=t.getElementsByTagName(n)[0],a.parentNode.insertBefore(u,a))}(window,document,'script');
+              twq('config','${process.env.NEXT_PUBLIC_X_PIXEL_ID}');
+            `}
+          </Script>
+        )}
       </head>
       <body>
         <AuthProvider>
diff --git a/lib/analytics.ts b/lib/analytics.ts
index 7211029..bfd86cf 100644
--- a/lib/analytics.ts
+++ b/lib/analytics.ts
@@ -5,7 +5,7 @@
  * Privacy-compliant with no PII tracking.
  */
 
-// Extend Window interface to include gtag and rdt
+// Extend Window interface to include gtag, rdt, and twq
 declare global {
   interface Window {
     gtag?: (
@@ -15,6 +15,7 @@ declare global {
     ) => void;
     dataLayer?: any[];
     rdt?: (command: string, ...args: any[]) => void;
+    twq?: (command: string, ...args: any[]) => void;
   }
 }
 
@@ -73,6 +74,48 @@ async function trackRedditConversion(
   }
 }
 
+/**
+ * Safely send an event to X (Twitter) Pixel
+ */
+function trackXEvent(eventId: string, metadata?: Record<string, any>) {
+  if (typeof window !== 'undefined' && window.twq) {
+    try {
+      if (metadata) {
+        window.twq('track', eventId, metadata);
+      } else {
+        window.twq('track', eventId);
+      }
+    } catch (error) {
+      console.warn('X Pixel tracking failed:', error);
+    }
+  }
+}
+
+/**
+ * Send event to X Conversions API (server-side)
+ */
+async function trackXConversion(
+  eventType: string,
+  metadata?: Record<string, any>
+) {
+  if (typeof window !== 'undefined') {
+    try {
+      await fetch('/api/x-conversion', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          eventType,
+          metadata,
+        }),
+      });
+    } catch (error) {
+      console.warn('X Conversions API tracking failed:', error);
+    }
+  }
+}
+
 // ============================================================================
 // CORE USER JOURNEY EVENTS (12 total)
 // ============================================================================
@@ -118,6 +161,10 @@ export function trackExploreTabViewed() {
   // Track as ViewContent event on Reddit
   trackRedditEvent('ViewContent');
   trackRedditConversion('ViewContent');
+
+  // Track as ViewContent event on X
+  trackXEvent('tw-r9lkr-rbs61');
+  trackXConversion('ViewContent');
 }
 
 /**
@@ -132,6 +179,10 @@ export function trackQueryRun(resultCount: number, shouldTrackReddit: boolean =
   if (shouldTrackReddit) {
     trackRedditEvent('Search');
     trackRedditConversion('Search');
+
+    // Track as Search event on X
+    trackXEvent('tw-r9lkr-138c4u');
+    trackXConversion('Search');
   }
 }
 
@@ -171,6 +222,14 @@ export function trackGenotypeFileLoaded(fileSize: number, variantCount: number)
   trackRedditConversion('Lead', {
     conversion_id: conversionId,
   });
+
+  // Track as Lead event on X
+  trackXEvent('tw-r9lkr-138c4w', {
+    conversion_id: conversionId,
+  });
+  trackXConversion('Lead', {
+    conversion_id: conversionId,
+  });
 }
 
 /**
@@ -212,6 +271,14 @@ export function trackUserLoggedIn() {
   trackRedditConversion('SignUp', {
     conversion_id: conversionId,
   });
+
+  // Track as SignUp event on X
+  trackXEvent('tw-r9lkr-138c4x', {
+    conversion_id: conversionId,
+  });
+  trackXConversion('SignUp', {
+    conversion_id: conversionId,
+  });
 }
 
 /**
@@ -272,6 +339,18 @@ export function trackSubscribedWithCreditCard(durationDays: number) {
     value: value,
     item_count: 1,
   });
+
+  // Track as Purchase event on X
+  trackXEvent('tw-r9lkr-138c4y', {
+    conversion_id: conversionId,
+    value: value.toFixed(2),
+    currency: 'USD',
+  });
+  trackXConversion('Purchase', {
+    conversion_id: conversionId,
+    value: value,
+    currency: 'USD',
+  });
 }
 
 /**
@@ -298,6 +377,18 @@ export function trackSubscribedWithStablecoin(durationDays: number) {
     value: value,
     item_count: 1,
   });
+
+  // Track as Purchase event on X
+  trackXEvent('tw-r9lkr-138c4y', {
+    conversion_id: conversionId,
+    value: value.toFixed(2),
+    currency: 'USD',
+  });
+  trackXConversion('Purchase', {
+    conversion_id: conversionId,
+    value: value,
+    currency: 'USD',
+  });
 }
 
 /**