diff --git a/graphql/server/src/middleware/__tests__/cookie.test.ts b/graphql/server/src/middleware/__tests__/cookie.test.ts
index 034d268d6..1e8348d7a 100644
--- a/graphql/server/src/middleware/__tests__/cookie.test.ts
+++ b/graphql/server/src/middleware/__tests__/cookie.test.ts
@@ -57,6 +57,23 @@ describe('cookie utilities', () => {
       expect(config.maxAge).toBe(2592000);
     });
 
+    it('uses PostgreSQL interval cookieMaxAge values', () => {
+      const authSettings: AuthSettings = {
+        cookieMaxAge: { days: 14 },
+      };
+      const config = getSessionCookieConfig(authSettings);
+      expect(config.maxAge).toBe(14 * 24 * 60 * 60);
+    });
+
+    it('uses PostgreSQL interval rememberMeDuration when rememberMe is true', () => {
+      const authSettings: AuthSettings = {
+        cookieMaxAge: { hours: 1 },
+        rememberMeDuration: { days: 30 },
+      };
+      const config = getSessionCookieConfig(authSettings, true);
+      expect(config.maxAge).toBe(30 * 24 * 60 * 60);
+    });
+
     it('uses cookieMaxAge when rememberMe is false', () => {
       const authSettings: AuthSettings = {
         cookieMaxAge: '3600',
@@ -73,6 +90,15 @@ describe('cookie utilities', () => {
       const config = getSessionCookieConfig(authSettings, true);
       expect(config.maxAge).toBe(7200);
     });
+
+    it('falls back to cookieMaxAge when rememberMeDuration is invalid', () => {
+      const authSettings: AuthSettings = {
+        cookieMaxAge: { hours: 2 },
+        rememberMeDuration: 'not-an-interval',
+      };
+      const config = getSessionCookieConfig(authSettings, true);
+      expect(config.maxAge).toBe(2 * 60 * 60);
+    });
   });
 
   describe('getDeviceTokenCookieConfig', () => {
diff --git a/graphql/server/src/middleware/cookie.ts b/graphql/server/src/middleware/cookie.ts
index bb9244639..c4fcf1c0d 100644
--- a/graphql/server/src/middleware/cookie.ts
+++ b/graphql/server/src/middleware/cookie.ts
@@ -1,5 +1,6 @@
 import type { Request, Response } from 'express';
 import type { AuthSettings } from '../types';
+import { pgIntervalToSeconds } from '../utils/pg-interval';
 
 export const SESSION_COOKIE_NAME = 'constructive_session';
 export const DEVICE_TOKEN_COOKIE_NAME = 'constructive_device_token';
@@ -24,12 +25,15 @@ export const getSessionCookieConfig = (
 ): CookieConfig => {
   const DEFAULT_MAX_AGE = 86400; // 24 hours
   let maxAge = DEFAULT_MAX_AGE;
-  if (rememberMe && authSettings?.rememberMeDuration) {
-    const parsed = parseInt(authSettings.rememberMeDuration, 10);
-    if (!isNaN(parsed)) maxAge = parsed;
-  } else if (authSettings?.cookieMaxAge) {
-    const parsed = parseInt(authSettings.cookieMaxAge, 10);
-    if (!isNaN(parsed)) maxAge = parsed;
+
+  const configuredMaxAge =
+    rememberMe
+      ? pgIntervalToSeconds(authSettings?.rememberMeDuration) ??
+        pgIntervalToSeconds(authSettings?.cookieMaxAge)
+      : pgIntervalToSeconds(authSettings?.cookieMaxAge);
+
+  if (configuredMaxAge !== null) {
+    maxAge = configuredMaxAge;
   }
 
   return {
diff --git a/graphql/server/src/types.ts b/graphql/server/src/types.ts
index 474ad0fc2..12435f624 100644
--- a/graphql/server/src/types.ts
+++ b/graphql/server/src/types.ts
@@ -11,6 +11,7 @@ export type {
   CorsModuleData,
   DatabaseSettings,
   GenericModuleData,
+  PgInterval,
   PubkeyChallengeSettings,
   PublicKeyChallengeData,
   RlsModule,
diff --git a/graphql/server/src/utils/__tests__/pg-interval.test.ts b/graphql/server/src/utils/__tests__/pg-interval.test.ts
new file mode 100644
index 000000000..60cb6170d
--- /dev/null
+++ b/graphql/server/src/utils/__tests__/pg-interval.test.ts
@@ -0,0 +1,35 @@
+import {
+  pgIntervalToMilliseconds,
+  pgIntervalToSeconds,
+} from '../pg-interval';
+
+describe('pg interval utilities', () => {
+  describe('pgIntervalToSeconds', () => {
+    it('treats numeric strings as seconds', () => {
+      expect(pgIntervalToSeconds('3600')).toBe(3600);
+    });
+
+    it('converts PostgreSQL interval objects to seconds', () => {
+      expect(pgIntervalToSeconds({ days: 1, hours: 2, minutes: 3, seconds: 4 })).toBe(
+        93784,
+      );
+    });
+
+    it('returns null for missing or invalid values', () => {
+      expect(pgIntervalToSeconds(null)).toBeNull();
+      expect(pgIntervalToSeconds(undefined)).toBeNull();
+      expect(pgIntervalToSeconds('not-an-interval')).toBeNull();
+    });
+
+    it('preserves zero-second values', () => {
+      expect(pgIntervalToSeconds('0')).toBe(0);
+      expect(pgIntervalToSeconds({ seconds: 0 })).toBe(0);
+    });
+  });
+
+  describe('pgIntervalToMilliseconds', () => {
+    it('converts parsed seconds to milliseconds', () => {
+      expect(pgIntervalToMilliseconds({ minutes: 10 })).toBe(10 * 60 * 1000);
+    });
+  });
+});
diff --git a/graphql/server/src/utils/pg-interval.ts b/graphql/server/src/utils/pg-interval.ts
new file mode 100644
index 000000000..6e63b6754
--- /dev/null
+++ b/graphql/server/src/utils/pg-interval.ts
@@ -0,0 +1,36 @@
+import type { PgInterval } from '@constructive-io/express-context';
+
+/**
+ * Convert a PostgreSQL interval value from auth settings into seconds.
+ *
+ * Numeric string values are treated as seconds, matching the existing auth
+ * settings cookie parser behavior.
+ */
+export function pgIntervalToSeconds(
+  interval: string | PgInterval | null | undefined,
+): number | null {
+  if (!interval) return null;
+
+  if (typeof interval === 'string') {
+    const seconds = parseInt(interval, 10);
+    return Number.isNaN(seconds) ? null : seconds;
+  }
+
+  let totalSeconds = 0;
+  if (interval.years) totalSeconds += interval.years * 365 * 24 * 60 * 60;
+  if (interval.months) totalSeconds += interval.months * 30 * 24 * 60 * 60;
+  if (interval.days) totalSeconds += interval.days * 24 * 60 * 60;
+  if (interval.hours) totalSeconds += interval.hours * 60 * 60;
+  if (interval.minutes) totalSeconds += interval.minutes * 60;
+  if (interval.seconds) totalSeconds += interval.seconds;
+  if (interval.milliseconds) totalSeconds += interval.milliseconds / 1000;
+
+  return totalSeconds;
+}
+
+export function pgIntervalToMilliseconds(
+  interval: string | PgInterval | null | undefined,
+): number | null {
+  const seconds = pgIntervalToSeconds(interval);
+  return seconds === null ? null : seconds * 1000;
+}
diff --git a/packages/express-context/src/index.ts b/packages/express-context/src/index.ts
index 02a6465ed..4633099a8 100644
--- a/packages/express-context/src/index.ts
+++ b/packages/express-context/src/index.ts
@@ -53,6 +53,7 @@ export type {
   InferenceLogConfig,
   LlmConfig,
   PublicKeyChallengeData,
+  PgInterval,
   PubkeyChallengeSettings,
   RlsModule,
   WebauthnSettings,
diff --git a/packages/express-context/src/loaders/auth-settings.ts b/packages/express-context/src/loaders/auth-settings.ts
index ff5fcfb93..d2e5e797e 100644
--- a/packages/express-context/src/loaders/auth-settings.ts
+++ b/packages/express-context/src/loaders/auth-settings.ts
@@ -10,7 +10,7 @@
  * database rather than the services database.
  */
 
-import type { AuthSettings } from '../types';
+import type { AuthSettings, PgInterval } from '../types';
 import type { LoaderContext, ModuleLoader } from './types';
 import { createModuleLoader } from './create-loader';
 
@@ -45,9 +45,9 @@ interface AuthSettingsRow {
   cookie_samesite: string;
   cookie_domain: string | null;
   cookie_httponly: boolean;
-  cookie_max_age: string | null;
+  cookie_max_age: string | PgInterval | null;
   cookie_path: string;
-  remember_me_duration: string | null;
+  remember_me_duration: string | PgInterval | null;
   enable_captcha: boolean;
   captcha_site_key: string | null;
 }
diff --git a/packages/express-context/src/types.ts b/packages/express-context/src/types.ts
index 39e0a79c5..d92131693 100644
--- a/packages/express-context/src/types.ts
+++ b/packages/express-context/src/types.ts
@@ -88,14 +88,24 @@ export interface RlsModule {
   currentUserAgent: string;
 }
 
+export interface PgInterval {
+  years?: number;
+  months?: number;
+  days?: number;
+  hours?: number;
+  minutes?: number;
+  seconds?: number;
+  milliseconds?: number;
+}
+
 export interface AuthSettings {
   cookieSecure?: boolean;
   cookieSamesite?: string;
   cookieDomain?: string | null;
   cookieHttponly?: boolean;
-  cookieMaxAge?: string | null;
+  cookieMaxAge?: string | PgInterval | null;
   cookiePath?: string;
-  rememberMeDuration?: string | null;
+  rememberMeDuration?: string | PgInterval | null;
   enableCaptcha?: boolean;
   captchaSiteKey?: string | null;
 }