diff --git a/app/api/auth/github/callback/route.ts b/app/api/auth/github/callback/route.ts
index 55e24a1..cd41afc 100644
--- a/app/api/auth/github/callback/route.ts
+++ b/app/api/auth/github/callback/route.ts
@@ -12,6 +12,25 @@ function getGitHubClientId() {
   return process.env.GITHUB_CLIENT_ID || process.env.NEXT_PUBLIC_GITHUB_CLIENT_ID
 }
 
+async function fetchPrimaryEmail(accessToken: string): Promise<string | null> {
+  try {
+    const res = await fetch('https://api.github.com/user/emails', {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+        Accept: 'application/vnd.github+json',
+        'User-Agent': 'RepoFuse',
+      },
+      cache: 'no-store',
+    })
+    if (!res.ok) return null
+    const emails = (await res.json()) as Array<{ email: string; primary: boolean; verified: boolean }>
+    const primary = emails.find((e) => e.primary && e.verified)
+    return primary?.email ?? emails.find((e) => e.verified)?.email ?? null
+  } catch {
+    return null
+  }
+}
+
 export async function GET(request: NextRequest) {
   try {
     const searchParams = request.nextUrl.searchParams
@@ -63,12 +82,16 @@ export async function GET(request: NextRequest) {
       return NextResponse.redirect(new URL('/?error=token_exchange_failed', getBaseUrl(request)))
     }
 
-    const userResponse = await fetch('https://api.github.com/user', {
-      headers: {
-        Authorization: `Bearer ${access_token}`,
-        Accept: 'application/vnd.github+json',
-      },
-    })
+    // Fetch user profile and primary email in parallel
+    const [userResponse, primaryEmail] = await Promise.all([
+      fetch('https://api.github.com/user', {
+        headers: {
+          Authorization: `Bearer ${access_token}`,
+          Accept: 'application/vnd.github+json',
+        },
+      }),
+      fetchPrimaryEmail(access_token),
+    ])
 
     if (!userResponse.ok) {
       return NextResponse.redirect(new URL('/?error=github_user_fetch_failed', getBaseUrl(request)))
@@ -79,13 +102,14 @@ export async function GET(request: NextRequest) {
     try {
       const sql = getDb()
       await sql`
-        INSERT INTO user_auth (github_id, github_username, github_avatar_url, access_token)
-        VALUES (${githubUser.id}, ${githubUser.login}, ${githubUser.avatar_url}, ${access_token})
+        INSERT INTO user_auth (github_id, github_username, github_avatar_url, access_token, email)
+        VALUES (${githubUser.id}, ${githubUser.login}, ${githubUser.avatar_url}, ${access_token}, ${primaryEmail})
         ON CONFLICT (github_id)
         DO UPDATE SET
           access_token = ${access_token},
           github_username = ${githubUser.login},
           github_avatar_url = ${githubUser.avatar_url},
+          email = COALESCE(${primaryEmail}, user_auth.email),
           updated_at = CURRENT_TIMESTAMP
       `
       await upsertSubscription({ github_id: githubUser.id })
@@ -133,4 +157,4 @@ export async function GET(request: NextRequest) {
     console.error('OAuth callback error:', error)
     return NextResponse.redirect(new URL('/?error=oauth_callback_failed', getBaseUrl(request)))
   }
-}
+}
\ No newline at end of file
diff --git a/app/api/auth/github/login/route.ts b/app/api/auth/github/login/route.ts
index 60dee30..0329c84 100644
--- a/app/api/auth/github/login/route.ts
+++ b/app/api/auth/github/login/route.ts
@@ -1,48 +1,49 @@
 import crypto from 'node:crypto'
-import { NextRequest, NextResponse } from 'next/server'
-import { sanitizeReturnTo } from '@/lib/auth'
+  import { NextRequest, NextResponse } from 'next/server'
+  import { sanitizeReturnTo } from '@/lib/auth'
 
-function getBaseUrl(request: NextRequest) {
-  return process.env.NEXT_PUBLIC_APP_URL || request.nextUrl.origin
-}
-
-function getGitHubClientId() {
-  return process.env.GITHUB_CLIENT_ID || process.env.NEXT_PUBLIC_GITHUB_CLIENT_ID
-}
-
-export async function GET(request: NextRequest) {
-  const clientId = getGitHubClientId()
+  function getBaseUrl(request: NextRequest) {
+    return process.env.NEXT_PUBLIC_APP_URL || request.nextUrl.origin
+  }
 
-  if (!clientId) {
-    return NextResponse.redirect(new URL('/?error=github_oauth_not_configured', getBaseUrl(request)))
+  function getGitHubClientId() {
+    return process.env.GITHUB_CLIENT_ID || process.env.NEXT_PUBLIC_GITHUB_CLIENT_ID
   }
 
-  const state = crypto.randomUUID()
-  const redirectUri = `${getBaseUrl(request)}/api/auth/github/callback`
-  const returnTo = sanitizeReturnTo(request.nextUrl.searchParams.get('returnTo'))
-
-  const params = new URLSearchParams({
-    client_id: clientId,
-    redirect_uri: redirectUri,
-    scope: 'read:user repo',
-    state,
-  })
-
-  const response = NextResponse.redirect(`https://github.com/login/oauth/authorize?${params.toString()}`)
-  response.cookies.set('github_oauth_state', state, {
-    httpOnly: true,
-    secure: process.env.NODE_ENV === 'production',
-    sameSite: 'lax',
-    path: '/',
-    maxAge: 60 * 10,
-  })
-  response.cookies.set('github_oauth_return_to', returnTo, {
-    httpOnly: true,
-    secure: process.env.NODE_ENV === 'production',
-    sameSite: 'lax',
-    path: '/',
-    maxAge: 60 * 10,
-  })
-
-  return response
-}
+  export async function GET(request: NextRequest) {
+    const clientId = getGitHubClientId()
+
+    if (!clientId) {
+      return NextResponse.redirect(new URL('/?error=github_oauth_not_configured', getBaseUrl(request)))
+    }
+
+    const state = crypto.randomUUID()
+    const redirectUri = `${getBaseUrl(request)}/api/auth/github/callback`
+    const returnTo = sanitizeReturnTo(request.nextUrl.searchParams.get('returnTo'))
+
+    const params = new URLSearchParams({
+      client_id: clientId,
+      redirect_uri: redirectUri,
+      scope: 'read:user user:email repo',
+      state,
+    })
+
+    const response = NextResponse.redirect(`https://github.com/login/oauth/authorize?${params.toString()}`)
+    response.cookies.set('github_oauth_state', state, {
+      httpOnly: true,
+      secure: process.env.NODE_ENV === 'production',
+      sameSite: 'lax',
+      path: '/',
+      maxAge: 60 * 10,
+    })
+    response.cookies.set('github_oauth_return_to', returnTo, {
+      httpOnly: true,
+      secure: process.env.NODE_ENV === 'production',
+      sameSite: 'lax',
+      path: '/',
+      maxAge: 60 * 10,
+    })
+
+    return response
+  }
+  
\ No newline at end of file
diff --git a/migrations/009_add_email_to_user_auth.sql b/migrations/009_add_email_to_user_auth.sql
new file mode 100644
index 0000000..5202fd6
--- /dev/null
+++ b/migrations/009_add_email_to_user_auth.sql
@@ -0,0 +1,10 @@
+-- Migration: Add email column to user_auth for marketing list capture
+  -- Run after 008_*.sql migrations
+
+  ALTER TABLE user_auth
+    ADD COLUMN IF NOT EXISTS email TEXT;
+
+  -- Index for fast email lookups
+  CREATE INDEX IF NOT EXISTS idx_user_auth_email ON user_auth (email)
+    WHERE email IS NOT NULL;
+  
\ No newline at end of file