diff --git a/src/encryptid/db.ts b/src/encryptid/db.ts
index 1d64e0c..bd960b0 100644
--- a/src/encryptid/db.ts
+++ b/src/encryptid/db.ts
@@ -575,6 +575,162 @@ export async function markDeviceLinkUsed(token: string): Promise<void> {
   await sql`UPDATE device_links SET used = TRUE WHERE token = ${token}`;
 }
 
+// ============================================================================
+// USER PROFILE OPERATIONS
+// ============================================================================
+
+export interface StoredUserProfile {
+  userId: string;
+  username: string;
+  displayName: string | null;
+  bio: string | null;
+  avatarUrl: string | null;
+  profileEmail: string | null;
+  profileEmailIsRecovery: boolean;
+  did: string | null;
+  walletAddress: string | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
+function rowToProfile(row: any): StoredUserProfile {
+  return {
+    userId: row.id,
+    username: row.username,
+    displayName: row.display_name || null,
+    bio: row.bio || null,
+    avatarUrl: row.avatar_url || null,
+    profileEmail: row.profile_email || null,
+    profileEmailIsRecovery: row.profile_email_is_recovery || false,
+    did: row.did || null,
+    walletAddress: row.wallet_address || null,
+    createdAt: row.created_at?.toISOString?.() || new Date(row.created_at).toISOString(),
+    updatedAt: row.updated_at?.toISOString?.() || row.created_at?.toISOString?.() || new Date().toISOString(),
+  };
+}
+
+export async function getUserProfile(userId: string): Promise<StoredUserProfile | null> {
+  const [row] = await sql`SELECT * FROM users WHERE id = ${userId}`;
+  if (!row) return null;
+  return rowToProfile(row);
+}
+
+export interface UserProfileUpdates {
+  displayName?: string | null;
+  bio?: string | null;
+  avatarUrl?: string | null;
+  profileEmail?: string | null;
+  profileEmailIsRecovery?: boolean;
+  walletAddress?: string | null;
+}
+
+export async function updateUserProfile(userId: string, updates: UserProfileUpdates): Promise<StoredUserProfile | null> {
+  const sets: string[] = [];
+  const values: any[] = [];
+
+  if (updates.displayName !== undefined) { sets.push('display_name'); values.push(updates.displayName); }
+  if (updates.bio !== undefined) { sets.push('bio'); values.push(updates.bio); }
+  if (updates.avatarUrl !== undefined) { sets.push('avatar_url'); values.push(updates.avatarUrl); }
+  if (updates.profileEmail !== undefined) { sets.push('profile_email'); values.push(updates.profileEmail); }
+  if (updates.profileEmailIsRecovery !== undefined) { sets.push('profile_email_is_recovery'); values.push(updates.profileEmailIsRecovery); }
+  if (updates.walletAddress !== undefined) { sets.push('wallet_address'); values.push(updates.walletAddress); }
+
+  if (sets.length === 0) {
+    return getUserProfile(userId);
+  }
+
+  // Build dynamic update — use tagged template for each field
+  // postgres lib doesn't easily support dynamic column names, so we use unsafe for the SET clause
+  const setClauses = sets.map((col, i) => `${col} = $${i + 2}`).join(', ');
+  const params = [userId, ...values];
+  await sql.unsafe(
+    `UPDATE users SET ${setClauses}, updated_at = NOW() WHERE id = $1`,
+    params,
+  );
+
+  return getUserProfile(userId);
+}
+
+// ============================================================================
+// ENCRYPTED ADDRESS OPERATIONS
+// ============================================================================
+
+export interface StoredEncryptedAddress {
+  id: string;
+  userId: string;
+  ciphertext: string;
+  iv: string;
+  label: string;
+  labelCustom: string | null;
+  isDefault: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+function rowToAddress(row: any): StoredEncryptedAddress {
+  return {
+    id: row.id,
+    userId: row.user_id,
+    ciphertext: row.ciphertext,
+    iv: row.iv,
+    label: row.label,
+    labelCustom: row.label_custom || null,
+    isDefault: row.is_default || false,
+    createdAt: row.created_at?.toISOString?.() || new Date(row.created_at).toISOString(),
+    updatedAt: row.updated_at?.toISOString?.() || new Date(row.updated_at).toISOString(),
+  };
+}
+
+export async function getUserAddresses(userId: string): Promise<StoredEncryptedAddress[]> {
+  const rows = await sql`
+    SELECT * FROM encrypted_addresses
+    WHERE user_id = ${userId}
+    ORDER BY is_default DESC, created_at ASC
+  `;
+  return rows.map(rowToAddress);
+}
+
+export async function getAddressById(id: string, userId: string): Promise<StoredEncryptedAddress | null> {
+  const [row] = await sql`
+    SELECT * FROM encrypted_addresses
+    WHERE id = ${id} AND user_id = ${userId}
+  `;
+  if (!row) return null;
+  return rowToAddress(row);
+}
+
+export async function saveUserAddress(
+  userId: string,
+  addr: { id: string; ciphertext: string; iv: string; label: string; labelCustom?: string; isDefault: boolean },
+): Promise<StoredEncryptedAddress> {
+  // If setting as default, unset all others first
+  if (addr.isDefault) {
+    await sql`UPDATE encrypted_addresses SET is_default = FALSE WHERE user_id = ${userId}`;
+  }
+
+  const rows = await sql`
+    INSERT INTO encrypted_addresses (id, user_id, ciphertext, iv, label, label_custom, is_default)
+    VALUES (${addr.id}, ${userId}, ${addr.ciphertext}, ${addr.iv}, ${addr.label}, ${addr.labelCustom || null}, ${addr.isDefault})
+    ON CONFLICT (id, user_id) DO UPDATE SET
+      ciphertext = ${addr.ciphertext},
+      iv = ${addr.iv},
+      label = ${addr.label},
+      label_custom = ${addr.labelCustom || null},
+      is_default = ${addr.isDefault},
+      updated_at = NOW()
+    RETURNING *
+  `;
+  return rowToAddress(rows[0]);
+}
+
+export async function deleteUserAddress(id: string, userId: string): Promise<boolean> {
+  const result = await sql`
+    DELETE FROM encrypted_addresses
+    WHERE id = ${id} AND user_id = ${userId}
+  `;
+  return result.count > 0;
+}
+
 // ============================================================================
 // HEALTH CHECK
 // ============================================================================
diff --git a/src/encryptid/schema.sql b/src/encryptid/schema.sql
index a35ef24..1730b77 100644
--- a/src/encryptid/schema.sql
+++ b/src/encryptid/schema.sql
@@ -12,6 +12,14 @@ CREATE TABLE IF NOT EXISTS users (
 
 CREATE INDEX IF NOT EXISTS idx_users_email ON users(email);
 
+-- Profile columns (added for user profile management)
+ALTER TABLE users ADD COLUMN IF NOT EXISTS bio TEXT;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS avatar_url TEXT;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS profile_email TEXT;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS profile_email_is_recovery BOOLEAN DEFAULT FALSE;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS wallet_address TEXT;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ DEFAULT NOW();
+
 CREATE TABLE IF NOT EXISTS credentials (
   credential_id TEXT PRIMARY KEY,
   user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
@@ -118,3 +126,24 @@ CREATE TABLE IF NOT EXISTS device_links (
 );
 
 CREATE INDEX IF NOT EXISTS idx_device_links_user_id ON device_links(user_id);
+
+-- ============================================================================
+-- ENCRYPTED POSTAL ADDRESSES (zero-knowledge address storage)
+-- ============================================================================
+
+-- Addresses are encrypted client-side with passkey-derived AES-256-GCM keys.
+-- The server stores opaque ciphertext + cleartext metadata (label, isDefault) for UI listing.
+CREATE TABLE IF NOT EXISTS encrypted_addresses (
+  id TEXT NOT NULL,
+  user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  ciphertext TEXT NOT NULL,
+  iv TEXT NOT NULL,
+  label TEXT NOT NULL CHECK (label IN ('home', 'work', 'shipping', 'billing', 'other')),
+  label_custom TEXT,
+  is_default BOOLEAN DEFAULT FALSE,
+  created_at TIMESTAMPTZ DEFAULT NOW(),
+  updated_at TIMESTAMPTZ DEFAULT NOW(),
+  PRIMARY KEY (id, user_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_encrypted_addresses_user_id ON encrypted_addresses(user_id);
diff --git a/src/encryptid/server.ts b/src/encryptid/server.ts
index 9170fd8..ccb8015 100644
--- a/src/encryptid/server.ts
+++ b/src/encryptid/server.ts
@@ -56,6 +56,12 @@ import {
   listSpaceMembers,
   upsertSpaceMember,
   removeSpaceMember,
+  getUserProfile,
+  updateUserProfile,
+  getUserAddresses,
+  getAddressById,
+  saveUserAddress,
+  deleteUserAddress,
 } from './db.js';
 
 // ============================================================================
@@ -637,6 +643,173 @@ app.get('/api/user/credentials', async (c) => {
   }
 });
 
+// ============================================================================
+// USER PROFILE ENDPOINTS
+// ============================================================================
+
+// GET /api/user/profile — get the authenticated user's profile
+app.get('/api/user/profile', async (c) => {
+  const claims = await verifyTokenFromRequest(c.req.header('Authorization'));
+  if (!claims) return c.json({ error: 'Unauthorized' }, 401);
+
+  const profile = await getUserProfile(claims.sub as string);
+  if (!profile) return c.json({ error: 'User not found' }, 404);
+
+  return c.json({ success: true, profile });
+});
+
+// PUT /api/user/profile — update the authenticated user's profile
+app.put('/api/user/profile', async (c) => {
+  const claims = await verifyTokenFromRequest(c.req.header('Authorization'));
+  if (!claims) return c.json({ error: 'Unauthorized' }, 401);
+
+  const body = await c.req.json();
+  const updates: Record<string, any> = {};
+
+  if (body.displayName !== undefined) updates.displayName = body.displayName;
+  if (body.bio !== undefined) {
+    if (typeof body.bio === 'string' && body.bio.length > 500) {
+      return c.json({ error: 'Bio must be 500 characters or fewer' }, 400);
+    }
+    updates.bio = body.bio;
+  }
+  if (body.avatarUrl !== undefined) updates.avatarUrl = body.avatarUrl;
+  if (body.profileEmail !== undefined) {
+    if (body.profileEmail && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(body.profileEmail)) {
+      return c.json({ error: 'Invalid email format' }, 400);
+    }
+    updates.profileEmail = body.profileEmail;
+  }
+  if (body.profileEmailIsRecovery !== undefined) updates.profileEmailIsRecovery = body.profileEmailIsRecovery;
+  if (body.walletAddress !== undefined) updates.walletAddress = body.walletAddress;
+
+  const profile = await updateUserProfile(claims.sub as string, updates);
+  if (!profile) return c.json({ error: 'User not found' }, 404);
+
+  return c.json({ success: true, profile });
+});
+
+// ============================================================================
+// ENCRYPTED ADDRESS ENDPOINTS
+// ============================================================================
+
+const MAX_ADDRESSES = 10;
+const VALID_LABELS = ['home', 'work', 'shipping', 'billing', 'other'];
+
+// GET /api/user/addresses — get all encrypted addresses for the user
+app.get('/api/user/addresses', async (c) => {
+  const claims = await verifyTokenFromRequest(c.req.header('Authorization'));
+  if (!claims) return c.json({ error: 'Unauthorized' }, 401);
+
+  const addresses = await getUserAddresses(claims.sub as string);
+  return c.json({
+    success: true,
+    addresses: addresses.map(a => ({
+      id: a.id,
+      ciphertext: a.ciphertext,
+      iv: a.iv,
+      label: a.label,
+      labelCustom: a.labelCustom,
+      isDefault: a.isDefault,
+    })),
+  });
+});
+
+// POST /api/user/addresses — save a new encrypted address
+app.post('/api/user/addresses', async (c) => {
+  const claims = await verifyTokenFromRequest(c.req.header('Authorization'));
+  if (!claims) return c.json({ error: 'Unauthorized' }, 401);
+
+  const userId = claims.sub as string;
+  const body = await c.req.json();
+
+  if (!body.id || !body.ciphertext || !body.iv || !body.label) {
+    return c.json({ error: 'Missing required fields: id, ciphertext, iv, label' }, 400);
+  }
+  if (!VALID_LABELS.includes(body.label)) {
+    return c.json({ error: `Invalid label. Must be one of: ${VALID_LABELS.join(', ')}` }, 400);
+  }
+
+  // Check address limit
+  const existing = await getUserAddresses(userId);
+  if (existing.length >= MAX_ADDRESSES) {
+    return c.json({ error: `Maximum ${MAX_ADDRESSES} addresses allowed` }, 400);
+  }
+
+  const address = await saveUserAddress(userId, {
+    id: body.id,
+    ciphertext: body.ciphertext,
+    iv: body.iv,
+    label: body.label,
+    labelCustom: body.labelCustom,
+    isDefault: body.isDefault || false,
+  });
+
+  return c.json({
+    success: true,
+    address: {
+      id: address.id,
+      ciphertext: address.ciphertext,
+      iv: address.iv,
+      label: address.label,
+      labelCustom: address.labelCustom,
+      isDefault: address.isDefault,
+    },
+  }, 201);
+});
+
+// PUT /api/user/addresses/:id — update an existing encrypted address
+app.put('/api/user/addresses/:id', async (c) => {
+  const claims = await verifyTokenFromRequest(c.req.header('Authorization'));
+  if (!claims) return c.json({ error: 'Unauthorized' }, 401);
+
+  const userId = claims.sub as string;
+  const id = c.req.param('id');
+  const body = await c.req.json();
+
+  const existing = await getAddressById(id, userId);
+  if (!existing) return c.json({ error: 'Address not found' }, 404);
+
+  if (body.label && !VALID_LABELS.includes(body.label)) {
+    return c.json({ error: `Invalid label. Must be one of: ${VALID_LABELS.join(', ')}` }, 400);
+  }
+
+  const address = await saveUserAddress(userId, {
+    id,
+    ciphertext: body.ciphertext || existing.ciphertext,
+    iv: body.iv || existing.iv,
+    label: body.label || existing.label,
+    labelCustom: body.labelCustom !== undefined ? body.labelCustom : existing.labelCustom,
+    isDefault: body.isDefault !== undefined ? body.isDefault : existing.isDefault,
+  });
+
+  return c.json({
+    success: true,
+    address: {
+      id: address.id,
+      ciphertext: address.ciphertext,
+      iv: address.iv,
+      label: address.label,
+      labelCustom: address.labelCustom,
+      isDefault: address.isDefault,
+    },
+  });
+});
+
+// DELETE /api/user/addresses/:id — delete an encrypted address
+app.delete('/api/user/addresses/:id', async (c) => {
+  const claims = await verifyTokenFromRequest(c.req.header('Authorization'));
+  if (!claims) return c.json({ error: 'Unauthorized' }, 401);
+
+  const userId = claims.sub as string;
+  const id = c.req.param('id');
+
+  const deleted = await deleteUserAddress(id, userId);
+  if (!deleted) return c.json({ error: 'Address not found' }, 404);
+
+  return c.json({ success: true });
+});
+
 // ============================================================================
 // ACCOUNT SETTINGS ENDPOINTS
 // ============================================================================