diff --git a/.github/workflows/e2e-opds-auth-catalog.yml b/.github/workflows/e2e-opds-auth-catalog.yml
new file mode 100644
index 000000000..5478fd06b
--- /dev/null
+++ b/.github/workflows/e2e-opds-auth-catalog.yml
@@ -0,0 +1,56 @@
+name: OPDS Auth Catalog E2E
+run-name: ${{ format('OPDS Auth Catalog E2E - {0}', github.ref_name) }}
+
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - "server/src/modules/opds/**"
+      - "server/src/modules/book/**"
+      - "server/src/modules/library/**"
+      - "server/src/modules/collection/**"
+      - "server/src/modules/lens/**"
+      - "server/src/modules/user/**"
+      - "server/src/modules/auth/**"
+      - "server/src/modules/app-settings/**"
+      - "server/test/opds-auth-catalog.e2e-spec.ts"
+      - "server/test/e2e/opds/**"
+      - "server/test/e2e/**"
+      - "server/src/db/schema/**"
+      - "packages/types/src/**"
+      - "scripts/test/**"
+      - "scripts/db/**"
+  pull_request:
+    paths:
+      - "server/src/modules/opds/**"
+      - "server/src/modules/book/**"
+      - "server/src/modules/library/**"
+      - "server/src/modules/collection/**"
+      - "server/src/modules/lens/**"
+      - "server/src/modules/user/**"
+      - "server/src/modules/auth/**"
+      - "server/src/modules/app-settings/**"
+      - "server/test/opds-auth-catalog.e2e-spec.ts"
+      - "server/test/e2e/opds/**"
+      - "server/test/e2e/**"
+      - "server/src/db/schema/**"
+      - "packages/types/src/**"
+      - "scripts/test/**"
+      - "scripts/db/**"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  checks: write
+
+jobs:
+  opds-auth-catalog-e2e:
+    uses: ./.github/workflows/e2e-runner.yml
+    with:
+      suite-id: opds-auth-catalog
+      check-name: Server OPDS Auth Catalog E2E
+      artifact-name: opds-auth-catalog-e2e-report
+      job-timeout-minutes: 45
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index 64e222e74..a8bee9e5f 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -119,7 +119,9 @@ pnpm run test:e2e -- smoke             # e2e smoke suite (default DB)
 pnpm run test:e2e -- scanner           # scanner e2e suite (dedicated projectx_e2e DB)
 pnpm run test:e2e -- scanner-file-ops  # scanner file operation e2e suite (dedicated projectx_e2e DB)
 pnpm run test:e2e -- staging-ingest-finalize  # staging ingest/finalize e2e suite (dedicated projectx_e2e DB)
+pnpm run test:e2e -- opds-auth-catalog # OPDS auth/catalog e2e suite (dedicated projectx_e2e DB)
 pnpm run test:e2e:all                  # alias for "pnpm run test:e2e -- all"
+pnpm run test:e2e:opds-auth-catalog    # alias for "pnpm run test:e2e -- opds-auth-catalog"
 pnpm run test:e2e:list                 # list all supported e2e suite ids
 ```
 
@@ -167,9 +169,17 @@ pnpm run test:e2e -- scanner --testNamePattern=book-per-folder-disc-folder-flatt
   - `staging-ingest-finalize-e2e-junit.xml`
   - `staging-ingest-finalize-e2e-scenarios.json`
 
+### OPDS auth/catalog e2e details
+
+- `pnpm run test:e2e -- opds-auth-catalog` prepares and migrates the dedicated e2e database (`projectx_e2e`) before running.
+- Local runs auto-start PostgreSQL with `docker-compose.dev.yml` if needed.
+- Results are written to `test-results/server/`:
+  - `opds-auth-catalog-e2e-junit.xml`
+  - `opds-auth-catalog-e2e-scenarios.json`
+
 ### E2E in CI (how to trigger)
 
-Both workflows call the reusable `E2E Runner (reusable)` workflow, which runs:
+All suite workflows call the reusable `E2E Runner (reusable)` workflow, which runs:
 
 ```bash
 pnpm run test:e2e -- <suite-id>
@@ -180,11 +190,12 @@ pnpm run test:e2e -- <suite-id>
 | Scanner E2E                 | `scanner`                 | `workflow_dispatch`, `push` (scanner-related paths), `pull_request` (same paths) |
 | Scanner File Ops E2E        | `scanner-file-ops`        | `workflow_dispatch`, nightly schedule (`0 4 * * *`), `push`, `pull_request`      |
 | Staging Ingest Finalize E2E | `staging-ingest-finalize` | `workflow_dispatch`, `push` (staging-related paths), `pull_request` (same paths) |
+| OPDS Auth Catalog E2E       | `opds-auth-catalog`       | `workflow_dispatch`, `push` (opds-related paths), `pull_request` (same paths)    |
 
 Manual trigger steps:
 
 1. Open GitHub Actions.
-2. Select **Scanner E2E**, **Scanner File Ops E2E**, or **Staging Ingest Finalize E2E**.
+2. Select **Scanner E2E**, **Scanner File Ops E2E**, **Staging Ingest Finalize E2E**, or **OPDS Auth Catalog E2E**.
 3. Click **Run workflow**.
 
 Each run uploads `test-results/server/` as an artifact and publishes JUnit annotations from `test-results/server/*-e2e-junit.xml`.
diff --git a/package.json b/package.json
index 5bbfcd137..02c53a161 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
     "test:e2e": "node ./scripts/test/run-e2e-suite.mjs",
     "test:e2e:all": "node ./scripts/test/run-e2e-suite.mjs all",
     "test:e2e:metadata-write": "node ./scripts/test/run-e2e-suite.mjs metadata-write",
+    "test:e2e:opds-auth-catalog": "node ./scripts/test/run-e2e-suite.mjs opds-auth-catalog",
     "test:e2e:metadata-write:atomicity": "node ./scripts/test/run-e2e-suite.mjs metadata-write --testNamePattern=\"atomicity failpoints\"",
     "test:e2e:metadata-write:concurrency": "node ./scripts/test/run-e2e-suite.mjs metadata-write --testNamePattern=\"concurrency hardening\"",
     "test:e2e:list": "node ./scripts/test/run-e2e-suite.mjs --list",
diff --git a/scripts/test/e2e-suites.mjs b/scripts/test/e2e-suites.mjs
index 30d183e29..57bcfa686 100644
--- a/scripts/test/e2e-suites.mjs
+++ b/scripts/test/e2e-suites.mjs
@@ -65,6 +65,14 @@ export const E2E_SUITES = Object.freeze({
     prepareDedicatedDatabase: true,
     useDedicatedDatabase: true,
   },
+  "opds-auth-catalog": {
+    id: "opds-auth-catalog",
+    description: "OPDS auth and catalog suite",
+    vitestTarget: "test/opds-auth-catalog.e2e-spec.ts",
+    junitOutput: `${TEST_RESULTS_DIR}/opds-auth-catalog-e2e-junit.xml`,
+    prepareDedicatedDatabase: true,
+    useDedicatedDatabase: true,
+  },
 });
 
 export function listE2ESuites() {
diff --git a/server/src/modules/opds/__tests__/opds-auth.guard.test.ts b/server/src/modules/opds/__tests__/opds-auth.guard.test.ts
index a92d9a5aa..bbb82a54e 100644
--- a/server/src/modules/opds/__tests__/opds-auth.guard.test.ts
+++ b/server/src/modules/opds/__tests__/opds-auth.guard.test.ts
@@ -2,7 +2,7 @@ import { ExecutionContext, ForbiddenException, UnauthorizedException } from '@ne
 import type { ConfigService } from '@nestjs/config';
 import { Permission } from '@projectx/types';
 
-import { OpdsAuthGuard } from '../opds-auth.guard';
+import { createCoverToken, OpdsAuthGuard } from '../opds-auth.guard';
 import type { OpdsRequestUser } from '../opds-auth.guard';
 import type { OpdsUserService } from '../opds-user.service';
 import type { UserService } from '../../user/user.service';
@@ -10,10 +10,10 @@ import type { PermissionService } from '../../../common/services/permission.serv
 
 const TEST_SECRET = 'test-jwt-secret';
 
-function mockContext(authHeader?: string, tokenParam?: string) {
+function mockContext(authHeader?: string, tokenParam?: string, url = '/api/v1/opds/libraries') {
   const query: Record<string, string> = {};
   if (tokenParam) query.t = tokenParam;
-  const request: Record<string, unknown> = { headers: { authorization: authHeader }, query };
+  const request: Record<string, unknown> = { headers: { authorization: authHeader }, query, url };
   const reply = { header: vi.fn() };
   return {
     request,
@@ -125,6 +125,23 @@ describe('OpdsAuthGuard', () => {
     await expect(guard.canActivate(context)).rejects.toThrow(ForbiddenException);
   });
 
+  it('rejects token auth on non-image routes with Basic challenge', async () => {
+    const guard = makeGuard();
+    const token = createCoverToken(1, TEST_SECRET);
+    const { context, reply } = mockContext(undefined, token, '/api/v1/opds/libraries');
+    await expect(guard.canActivate(context)).rejects.toThrow(UnauthorizedException);
+    expect(reply.header).toHaveBeenCalledWith('WWW-Authenticate', 'Basic realm="projectx OPDS"');
+  });
+
+  it('accepts token auth on image routes', async () => {
+    const guard = makeGuard();
+    const token = createCoverToken(1, TEST_SECRET);
+    const { context, request } = mockContext(undefined, token, '/api/v1/opds/42/cover');
+    const result = await guard.canActivate(context);
+    expect(result).toBe(true);
+    expect((request.opdsUser as OpdsRequestUser).userId).toBe(1);
+  });
+
   it('attaches opdsUser to request on success', async () => {
     const guard = makeGuard();
     const { context, request } = mockContext(basicHeader('reader', 'pass'));
diff --git a/server/src/modules/opds/__tests__/opds-user.service.test.ts b/server/src/modules/opds/__tests__/opds-user.service.test.ts
index f0f3da22e..3755a0e25 100644
--- a/server/src/modules/opds/__tests__/opds-user.service.test.ts
+++ b/server/src/modules/opds/__tests__/opds-user.service.test.ts
@@ -83,6 +83,17 @@ describe('OpdsUserService', () => {
       await expect(service.create(5, { username: 'duplicate', password: 'password123' })).rejects.toThrow(ConflictException);
     });
 
+    it('throws ConflictException when duplicate violation is wrapped by DrizzleQueryError', async () => {
+      const wrapped = new Error('failed query', {
+        cause: { code: '23505' },
+      });
+      mockValues.mockReturnValue({
+        returning: vi.fn().mockRejectedValue(wrapped),
+      });
+
+      await expect(service.create(5, { username: 'duplicate', password: 'password123' })).rejects.toThrow(ConflictException);
+    });
+
     it('rethrows non-unique-violation errors', async () => {
       const genericError = new Error('connection lost');
       mockValues.mockReturnValue({
diff --git a/server/src/modules/opds/opds-auth.guard.ts b/server/src/modules/opds/opds-auth.guard.ts
index 43c1474ad..9212577f1 100644
--- a/server/src/modules/opds/opds-auth.guard.ts
+++ b/server/src/modules/opds/opds-auth.guard.ts
@@ -23,6 +23,16 @@ export function createCoverToken(userId: number, secret: string): string {
   return `${userId}.${sig}`;
 }
 
+function stripQuery(url: string): string {
+  const queryIndex = url.indexOf('?');
+  if (queryIndex === -1) return url;
+  return url.slice(0, queryIndex);
+}
+
+function isTokenImagePath(requestPath: string): boolean {
+  return /(?:^|\/)(?:api\/v1\/)?opds\/\d+\/(cover|thumbnail)$/.test(requestPath.replace(/^\//, ''));
+}
+
 function parseCoverToken(token: string, secret: string): number | null {
   const dot = token.indexOf('.');
   if (dot === -1) return null;
@@ -46,8 +56,15 @@ export class OpdsAuthGuard implements CanActivate {
     const request = context.switchToHttp().getRequest<FastifyRequest>();
     const reply = context.switchToHttp().getResponse<FastifyReply>();
 
-    const tokenParam = (request.query as Record<string, string | undefined>).t;
+    const tokenQuery = (request.query as Record<string, string | string[] | undefined>).t;
+    const tokenParam = Array.isArray(tokenQuery) ? tokenQuery[0] : tokenQuery;
     if (tokenParam) {
+      const requestPath = stripQuery(request.url ?? '');
+      if (!isTokenImagePath(requestPath)) {
+        reply.header('WWW-Authenticate', 'Basic realm="projectx OPDS"');
+        throw new UnauthorizedException('Basic authentication required');
+      }
+
       const secret = this.config.get<string>('auth.jwtSecret')!;
       const userId = parseCoverToken(tokenParam, secret);
       if (!userId) throw new UnauthorizedException('Invalid token');
diff --git a/server/src/modules/opds/opds-book.service.ts b/server/src/modules/opds/opds-book.service.ts
index 8c988e8d2..f07b830c1 100644
--- a/server/src/modules/opds/opds-book.service.ts
+++ b/server/src/modules/opds/opds-book.service.ts
@@ -106,6 +106,17 @@ export class OpdsBookService {
       throw new ForbiddenException('No access to this library');
     }
 
+    if (filters?.collectionId) {
+      const [collection] = await this.db
+        .select({ userId: collections.userId })
+        .from(collections)
+        .where(eq(collections.id, filters.collectionId))
+        .limit(1);
+      if (!collection || collection.userId !== userId) {
+        throw new ForbiddenException('No access to this collection');
+      }
+    }
+
     if (filters?.lensId) {
       return this.getBooksByLens(userId, filters.lensId, accessibleIds, sortOrder, page, size);
     }
diff --git a/server/src/modules/opds/opds-user.service.ts b/server/src/modules/opds/opds-user.service.ts
index 3b0268b5d..1714a2a7b 100644
--- a/server/src/modules/opds/opds-user.service.ts
+++ b/server/src/modules/opds/opds-user.service.ts
@@ -10,6 +10,17 @@ import { UpdateOpdsUserDto } from './dto/update-opds-user.dto';
 
 type Db = NodePgDatabase<typeof schema>;
 
+function isUniqueViolation(error: unknown): boolean {
+  if (!error || typeof error !== 'object') return false;
+
+  const directCode = (error as { code?: unknown }).code;
+  if (directCode === '23505') return true;
+
+  if (!(error instanceof Error)) return false;
+  const causeCode = (error.cause as { code?: unknown } | undefined)?.code;
+  return causeCode === '23505';
+}
+
 @Injectable()
 export class OpdsUserService {
   constructor(@Inject(DB) private readonly db: Db) {}
@@ -48,7 +59,7 @@ export class OpdsUserService {
         });
       return created;
     } catch (err: unknown) {
-      if (err instanceof Error && 'code' in err && (err as { code: string }).code === '23505') {
+      if (isUniqueViolation(err)) {
         throw new ConflictException('An OPDS user with this username already exists');
       }
       throw err;
diff --git a/server/src/modules/opds/opds.controller.ts b/server/src/modules/opds/opds.controller.ts
index 7143531cc..dc1fdc0e5 100644
--- a/server/src/modules/opds/opds.controller.ts
+++ b/server/src/modules/opds/opds.controller.ts
@@ -1,4 +1,16 @@
-import { Controller, DefaultValuePipe, Get, Headers, NotFoundException, Param, ParseIntPipe, Query, Res, UseGuards } from '@nestjs/common';
+import {
+  BadRequestException,
+  Controller,
+  DefaultValuePipe,
+  Get,
+  Headers,
+  NotFoundException,
+  Param,
+  ParseIntPipe,
+  Query,
+  Res,
+  UseGuards,
+} from '@nestjs/common';
 import { createReadStream } from 'fs';
 import { readdir, stat } from 'fs/promises';
 import { join } from 'path';
@@ -86,9 +98,13 @@ export class OpdsController {
     const clampedPage = Math.max(page, 1);
 
     const filters: Record<string, string | number> = {};
-    if (libraryIdStr) filters.libraryId = parseInt(libraryIdStr, 10);
-    if (collectionIdStr) filters.collectionId = parseInt(collectionIdStr, 10);
-    if (lensIdStr) filters.lensId = parseInt(lensIdStr, 10);
+    const libraryId = this.parseOptionalPositiveInt('libraryId', libraryIdStr);
+    const collectionId = this.parseOptionalPositiveInt('collectionId', collectionIdStr);
+    const lensId = this.parseOptionalPositiveInt('lensId', lensIdStr);
+
+    if (libraryId !== undefined) filters.libraryId = libraryId;
+    if (collectionId !== undefined) filters.collectionId = collectionId;
+    if (lensId !== undefined) filters.lensId = lensId;
     if (author) filters.author = author;
     if (series) filters.series = series;
     if (q) filters.q = q;
@@ -254,4 +270,17 @@ export class OpdsController {
   private sendXml(reply: FastifyReply, xml: string, mimeType: string) {
     reply.type(`${mimeType}; charset=utf-8`).send(xml);
   }
+
+  private parseOptionalPositiveInt(name: string, value?: string): number | undefined {
+    if (value === undefined) return undefined;
+    if (!/^\d+$/.test(value)) {
+      throw new BadRequestException(`${name} must be a positive integer`);
+    }
+
+    const parsed = Number.parseInt(value, 10);
+    if (!Number.isSafeInteger(parsed) || parsed <= 0) {
+      throw new BadRequestException(`${name} must be a positive integer`);
+    }
+    return parsed;
+  }
 }
diff --git a/server/test/authorization-matrix.e2e-spec.ts b/server/test/authorization-matrix.e2e-spec.ts
index dd94251c2..a47fed829 100644
--- a/server/test/authorization-matrix.e2e-spec.ts
+++ b/server/test/authorization-matrix.e2e-spec.ts
@@ -596,12 +596,12 @@ describe('Authorization matrix (e2e)', () => {
     it('rejects invalid OPDS token auth', async () => {
       const response = await ctx.app.inject({
         method: 'GET',
-        url: '/api/v1/opds/libraries?t=invalid-token',
+        url: `/api/v1/opds/${bookA.bookId}/cover?t=invalid-token`,
       });
       expectError(response, 401, 'Invalid token');
     });
 
-    it('allows OPDS token auth when token and permission are valid', async () => {
+    it('rejects OPDS token auth on non-image routes', async () => {
       const config = ctx.app.get(ConfigService);
       const jwtSecret = config.getOrThrow<string>('auth.jwtSecret');
       const token = createCoverToken(personas.opdsOwner.userId, jwtSecret);
@@ -610,8 +610,21 @@ describe('Authorization matrix (e2e)', () => {
         method: 'GET',
         url: `/api/v1/opds/libraries?t=${token}`,
       });
+      expectError(response, 401, 'Basic authentication required');
+      expect(response.headers['www-authenticate']).toContain('Basic realm=');
+    });
+
+    it('allows OPDS token auth on image routes when token and permission are valid', async () => {
+      const config = ctx.app.get(ConfigService);
+      const jwtSecret = config.getOrThrow<string>('auth.jwtSecret');
+      const token = createCoverToken(personas.opdsOwner.userId, jwtSecret);
+
+      const response = await ctx.app.inject({
+        method: 'GET',
+        url: `/api/v1/opds/${bookA.bookId}/cover?t=${token}`,
+      });
       expect(response.statusCode).toBe(200);
-      expect(response.headers['content-type']).toContain('application/atom+xml');
+      expect(response.headers['content-type']).toContain('image/jpeg');
     });
   });
 
diff --git a/server/test/e2e/opds/opds-fixture-builder.ts b/server/test/e2e/opds/opds-fixture-builder.ts
new file mode 100644
index 000000000..57f53952d
--- /dev/null
+++ b/server/test/e2e/opds/opds-fixture-builder.ts
@@ -0,0 +1,43 @@
+import { mkdir, mkdtemp, rm, writeFile } from 'fs/promises';
+import { tmpdir } from 'os';
+import { dirname, join } from 'path';
+
+export { createEpubFixture } from '../metadata-write/metadata-write-fixture-builder';
+
+export interface OpdsFixtureRoot {
+  rootPath: string;
+  booksPath: string;
+  stagingPath: string;
+  cleanup: () => Promise<void>;
+}
+
+function assertRelativePath(path: string): void {
+  if (path.startsWith('/')) {
+    throw new Error(`Fixture paths must be relative. Received "${path}"`);
+  }
+}
+
+export async function createOpdsFixtureRoot(prefix = 'opds-e2e-'): Promise<OpdsFixtureRoot> {
+  const rootPath = await mkdtemp(join(tmpdir(), prefix));
+  const booksPath = join(rootPath, 'books');
+  const stagingPath = join(booksPath, 'staging');
+  await mkdir(stagingPath, { recursive: true });
+
+  return {
+    rootPath,
+    booksPath,
+    stagingPath,
+    cleanup: async () => {
+      await rm(rootPath, { recursive: true, force: true });
+    },
+  };
+}
+
+export async function writeFixtureFile(rootPath: string, relativePath: string, content: string | Buffer): Promise<string> {
+  assertRelativePath(relativePath);
+
+  const absolutePath = join(rootPath, relativePath);
+  await mkdir(dirname(absolutePath), { recursive: true });
+  await writeFile(absolutePath, content);
+  return absolutePath;
+}
diff --git a/server/test/e2e/opds/opds-harness.ts b/server/test/e2e/opds/opds-harness.ts
new file mode 100644
index 000000000..6a59539ab
--- /dev/null
+++ b/server/test/e2e/opds/opds-harness.ts
@@ -0,0 +1,407 @@
+import { randomUUID } from 'crypto';
+import { hash } from 'bcryptjs';
+import fastifyCookie from '@fastify/cookie';
+import { Test } from '@nestjs/testing';
+import { FastifyAdapter, type NestFastifyApplication } from '@nestjs/platform-fastify';
+import { mkdir } from 'fs/promises';
+import { and, eq } from 'drizzle-orm';
+import type { NodePgDatabase } from 'drizzle-orm/node-postgres';
+import { DEFAULT_FORMAT_PRIORITY, type Permission } from '@projectx/types';
+
+import { AppModule } from '../../../src/app.module';
+import { DB } from '../../../src/db';
+import * as schema from '../../../src/db/schema';
+import { MetadataService } from '../../../src/modules/metadata/metadata.service';
+import { StagingWatcherService } from '../../../src/modules/staging/staging-watcher.service';
+import { seedLibrary, waitForScanCompletion } from '../app-harness';
+import { createOpdsFixtureRoot, type OpdsFixtureRoot, writeFixtureFile } from './opds-fixture-builder';
+
+type Db = NodePgDatabase<typeof schema>;
+
+const ADMIN_SETUP_DTO = {
+  username: 'opds-e2e-admin',
+  name: 'OPDS E2E Admin',
+  email: 'opds-e2e-admin@example.com',
+  password: 'OpdsE2EAdmin123',
+};
+
+interface EnvSnapshot {
+  booksPath: string | undefined;
+  stagingPath: string | undefined;
+}
+
+export interface OpdsE2EContext {
+  app: NestFastifyApplication;
+  db: Db;
+  adminToken: string;
+  fixture: OpdsFixtureRoot;
+  envSnapshot: EnvSnapshot;
+}
+
+export interface CreatedLibrary {
+  libraryId: number;
+  libraryFolderId: number;
+  folderPath: string;
+}
+
+export interface TestUserSession {
+  userId: number;
+  username: string;
+  password: string;
+  accessToken: string;
+}
+
+export interface LocatedBookFile {
+  libraryId: number;
+  bookId: number;
+  bookFileId: number;
+  absolutePath: string;
+  relPath: string | null;
+  format: string | null;
+}
+
+export function authHeader(token: string): Record<string, string> {
+  return { authorization: `Bearer ${token}` };
+}
+
+export function basicAuth(username: string, password: string): string {
+  const value = Buffer.from(`${username}:${password}`, 'utf8').toString('base64');
+  return `Basic ${value}`;
+}
+
+export async function createOpdsE2EContext(): Promise<OpdsE2EContext> {
+  const fixture = await createOpdsFixtureRoot();
+  const envSnapshot: EnvSnapshot = {
+    booksPath: process.env.BOOKS_PATH,
+    stagingPath: process.env.STAGING_PATH,
+  };
+
+  process.env.BOOKS_PATH = fixture.booksPath;
+  process.env.STAGING_PATH = fixture.stagingPath;
+
+  const moduleFixture = await Test.createTestingModule({
+    imports: [AppModule],
+  })
+    .overrideProvider(MetadataService)
+    .useValue(makeMetadataNoopMock())
+    .compile();
+
+  const app = moduleFixture.createNestApplication<NestFastifyApplication>(new FastifyAdapter());
+  app.setGlobalPrefix('api/v1');
+  await app.register(fastifyCookie as never);
+  await app.init();
+  await app.getHttpAdapter().getInstance().ready();
+
+  await stopStagingWatcher(app);
+
+  const db = app.get<Db>(DB);
+  const adminToken = await getAdminToken(app, db);
+  await setSettingValue(db, 'opds_enabled', 'true');
+
+  return {
+    app,
+    db,
+    adminToken,
+    fixture,
+    envSnapshot,
+  };
+}
+
+export async function closeOpdsE2EContext(ctx: OpdsE2EContext): Promise<void> {
+  await ctx.app.close();
+  await ctx.fixture.cleanup();
+  restoreEnv(ctx.envSnapshot);
+}
+
+export async function createLibraryWithFolder(
+  ctx: OpdsE2EContext,
+  options: {
+    mode?: 'book_per_file' | 'book_per_folder';
+    allowedFormats?: string[];
+    name?: string;
+  } = {},
+): Promise<CreatedLibrary> {
+  const folderPath = `${ctx.fixture.booksPath}/library-${randomUUID()}`;
+  await mkdir(folderPath, { recursive: true });
+
+  const [library] = await ctx.db
+    .insert(schema.libraries)
+    .values({
+      name: options.name ?? `opds-e2e-library-${randomUUID()}`,
+      watch: false,
+      organizationMode: options.mode ?? 'book_per_file',
+      allowedFormats: options.allowedFormats ?? [],
+      excludePatterns: [],
+      formatPriority: [...DEFAULT_FORMAT_PRIORITY],
+    })
+    .returning({ id: schema.libraries.id });
+
+  const [libraryFolder] = await ctx.db
+    .insert(schema.libraryFolders)
+    .values({
+      libraryId: library.id,
+      path: folderPath,
+    })
+    .returning({ id: schema.libraryFolders.id });
+
+  return {
+    libraryId: library.id,
+    libraryFolderId: libraryFolder.id,
+    folderPath,
+  };
+}
+
+export async function triggerAndWaitForLibraryScan(
+  ctx: OpdsE2EContext,
+  libraryId: number,
+  timeoutMs = 45_000,
+): Promise<typeof schema.scanJobs.$inferSelect> {
+  const response = await ctx.app.inject({
+    method: 'POST',
+    url: `/api/v1/scanner/libraries/${libraryId}/scan`,
+    headers: authHeader(ctx.adminToken),
+  });
+
+  if (response.statusCode !== 202) {
+    throw new Error(`Scan endpoint failed: ${response.statusCode} ${response.body}`);
+  }
+
+  const body = response.json() as { jobId?: number };
+  if (!body.jobId) {
+    throw new Error(`Scan endpoint returned no jobId: ${response.body}`);
+  }
+
+  return waitForScanCompletion(ctx.db, body.jobId, timeoutMs);
+}
+
+export async function locateBookByAbsolutePath(ctx: OpdsE2EContext, absolutePath: string): Promise<LocatedBookFile> {
+  const [row] = await ctx.db
+    .select({
+      libraryId: schema.books.libraryId,
+      bookId: schema.books.id,
+      bookFileId: schema.bookFiles.id,
+      absolutePath: schema.bookFiles.absolutePath,
+      relPath: schema.bookFiles.relPath,
+      format: schema.bookFiles.format,
+    })
+    .from(schema.bookFiles)
+    .innerJoin(schema.books, eq(schema.books.id, schema.bookFiles.bookId))
+    .where(and(eq(schema.books.status, 'present'), eq(schema.bookFiles.absolutePath, absolutePath)))
+    .limit(1);
+
+  if (!row) {
+    throw new Error(`No present book file found for path "${absolutePath}"`);
+  }
+
+  return row;
+}
+
+export async function createBookCoverArtifacts(
+  ctx: OpdsE2EContext,
+  bookId: number,
+  options: {
+    coverExtension?: 'jpg' | 'png';
+    coverContent?: Buffer;
+    thumbnailContent?: Buffer;
+  } = {},
+): Promise<void> {
+  const coverExtension = options.coverExtension ?? 'jpg';
+  const coverContent = options.coverContent ?? Buffer.from(`cover-${bookId}`, 'utf8');
+  const thumbnailContent = options.thumbnailContent ?? Buffer.from(`thumbnail-${bookId}`, 'utf8');
+
+  await writeFixtureFile(ctx.fixture.booksPath, `covers/${bookId}/cover.${coverExtension}`, coverContent);
+  await writeFixtureFile(ctx.fixture.booksPath, `covers/${bookId}/thumbnail.jpg`, thumbnailContent);
+}
+
+export async function createUserAndLogin(
+  ctx: OpdsE2EContext,
+  options: {
+    permissions?: Permission[];
+    isSuperuser?: boolean;
+    isDefaultPassword?: boolean;
+    active?: boolean;
+    username?: string;
+    password?: string;
+    email?: string;
+  } = {},
+): Promise<TestUserSession> {
+  const suffix = randomUUID().replaceAll('-', '');
+  const username = options.username ?? `opds-e2e-user-${suffix}`;
+  const password = options.password ?? 'OpdsE2EUser123';
+  const email = options.email ?? `${username}@example.com`;
+  const passwordHash = await hash(password, 12);
+
+  const [created] = await ctx.db
+    .insert(schema.users)
+    .values({
+      username,
+      name: `OPDS E2E User ${suffix}`,
+      email,
+      passwordHash,
+      active: options.active ?? true,
+      isSuperuser: options.isSuperuser ?? false,
+      isDefaultPassword: options.isDefaultPassword ?? false,
+      provisioningMethod: 'local',
+    })
+    .returning({ id: schema.users.id });
+
+  const permissions = options.permissions ?? [];
+  if (permissions.length > 0) {
+    await ctx.db.insert(schema.userPermissions).values(permissions.map((permissionName) => ({ userId: created.id, permissionName })));
+  }
+
+  const accessToken = await loginForToken(ctx.app, username, password);
+  if (!accessToken) {
+    throw new Error(`Login failed for ${username}`);
+  }
+
+  return {
+    userId: created.id,
+    username,
+    password,
+    accessToken,
+  };
+}
+
+export async function grantLibraryAccess(
+  ctx: OpdsE2EContext,
+  userId: number,
+  libraryId: number,
+  accessLevel: 'viewer' | 'editor' | 'owner' = 'viewer',
+): Promise<void> {
+  await ctx.db
+    .insert(schema.userLibraryAccess)
+    .values({ userId, libraryId, accessLevel })
+    .onConflictDoUpdate({
+      target: [schema.userLibraryAccess.userId, schema.userLibraryAccess.libraryId],
+      set: { accessLevel },
+    });
+}
+
+export async function replaceUserPermissions(ctx: OpdsE2EContext, userId: number, permissions: Permission[]): Promise<void> {
+  await ctx.db.delete(schema.userPermissions).where(eq(schema.userPermissions.userId, userId));
+  if (permissions.length === 0) return;
+  await ctx.db.insert(schema.userPermissions).values(permissions.map((permissionName) => ({ userId, permissionName })));
+}
+
+export async function setUserActive(ctx: OpdsE2EContext, userId: number, active: boolean): Promise<void> {
+  await ctx.db.update(schema.users).set({ active }).where(eq(schema.users.id, userId));
+}
+
+export async function setSetting(ctx: OpdsE2EContext, key: string, value: string): Promise<void> {
+  await setSettingValue(ctx.db, key, value);
+}
+
+export async function createOpdsUserCredential(
+  ctx: OpdsE2EContext,
+  input: {
+    userId: number;
+    username?: string;
+    password?: string;
+    sortOrder?: typeof schema.opdsUsers.$inferInsert.sortOrder;
+  },
+): Promise<{ row: typeof schema.opdsUsers.$inferSelect; password: string }> {
+  const username = input.username ?? `opds-${randomUUID().replaceAll('-', '').slice(0, 12)}`;
+  const password = input.password ?? 'OpdsCredential123';
+  const passwordHash = await hash(password, 12);
+
+  const [row] = await ctx.db
+    .insert(schema.opdsUsers)
+    .values({
+      userId: input.userId,
+      username,
+      passwordHash,
+      sortOrder: input.sortOrder ?? 'recent',
+    })
+    .returning();
+
+  return { row, password };
+}
+
+function makeMetadataNoopMock(): Pick<
+  MetadataService,
+  'extractAndSave' | 'refreshCoverForBook' | 'extractAudioFileDuration' | 'aggregateAudioDuration' | 'extractAudioChaptersAndNarrators'
+> {
+  return {
+    extractAndSave: () => Promise.resolve(undefined),
+    refreshCoverForBook: () => Promise.resolve(false),
+    extractAudioFileDuration: () => Promise.resolve(undefined),
+    aggregateAudioDuration: () => Promise.resolve(undefined),
+    extractAudioChaptersAndNarrators: () => Promise.resolve(undefined),
+  };
+}
+
+async function stopStagingWatcher(app: NestFastifyApplication): Promise<void> {
+  const watcher = app.get(StagingWatcherService);
+  await watcher.onModuleDestroy();
+}
+
+async function getAdminToken(app: NestFastifyApplication, db: Db): Promise<string> {
+  const response = await app.inject({
+    method: 'POST',
+    url: '/api/v1/auth/setup',
+    payload: ADMIN_SETUP_DTO,
+  });
+
+  if (response.statusCode === 409) {
+    const existingToken = await loginForToken(app, ADMIN_SETUP_DTO.username, ADMIN_SETUP_DTO.password);
+    if (existingToken) return existingToken;
+
+    const suffix = randomUUID().replaceAll('-', '');
+    const fallbackUsername = `opds-e2e-admin-${suffix}`;
+    const passwordHash = await hash(ADMIN_SETUP_DTO.password, 12);
+
+    await db.insert(schema.users).values({
+      username: fallbackUsername,
+      name: 'OPDS E2E Admin',
+      email: `${fallbackUsername}@example.com`,
+      passwordHash,
+      isSuperuser: true,
+      isDefaultPassword: false,
+      provisioningMethod: 'local',
+    });
+
+    const fallbackToken = await loginForToken(app, fallbackUsername, ADMIN_SETUP_DTO.password);
+    if (fallbackToken) return fallbackToken;
+    throw new Error('Setup is already complete and fallback admin login failed');
+  }
+
+  if (response.statusCode !== 201) {
+    throw new Error(`Unable to complete setup: ${response.statusCode} ${response.body}`);
+  }
+
+  const body = response.json() as { accessToken?: string };
+  if (!body.accessToken) {
+    throw new Error('Setup succeeded but accessToken is missing');
+  }
+
+  return body.accessToken;
+}
+
+async function loginForToken(app: NestFastifyApplication, username: string, password: string): Promise<string | null> {
+  const response = await app.inject({
+    method: 'POST',
+    url: '/api/v1/auth/login',
+    payload: { username, password },
+  });
+  if (response.statusCode !== 200) return null;
+  const body = response.json() as { accessToken?: string };
+  return body.accessToken ?? null;
+}
+
+async function setSettingValue(db: Db, key: string, value: string): Promise<void> {
+  await db.insert(schema.appSettings).values({ key, value }).onConflictDoUpdate({
+    target: schema.appSettings.key,
+    set: { value },
+  });
+}
+
+function restoreEnv(snapshot: EnvSnapshot): void {
+  if (snapshot.booksPath === undefined) delete process.env.BOOKS_PATH;
+  else process.env.BOOKS_PATH = snapshot.booksPath;
+
+  if (snapshot.stagingPath === undefined) delete process.env.STAGING_PATH;
+  else process.env.STAGING_PATH = snapshot.stagingPath;
+}
+
+export { seedLibrary };
diff --git a/server/test/opds-auth-catalog.e2e-spec.ts b/server/test/opds-auth-catalog.e2e-spec.ts
new file mode 100644
index 000000000..161c25f4f
--- /dev/null
+++ b/server/test/opds-auth-catalog.e2e-spec.ts
@@ -0,0 +1,607 @@
+import { randomUUID } from 'crypto';
+import { mkdir, writeFile } from 'fs/promises';
+import { dirname, join } from 'path';
+
+import { eq } from 'drizzle-orm';
+import { Permission } from '@projectx/types';
+import { ConfigService } from '@nestjs/config';
+
+import { createCoverToken } from '../src/modules/opds/opds-auth.guard';
+import * as schema from '../src/db/schema';
+import { createEpubFixture } from './e2e/opds/opds-fixture-builder';
+import {
+  authHeader,
+  basicAuth,
+  closeOpdsE2EContext,
+  createBookCoverArtifacts,
+  createLibraryWithFolder,
+  createOpdsE2EContext,
+  createOpdsUserCredential,
+  createUserAndLogin,
+  grantLibraryAccess,
+  locateBookByAbsolutePath,
+  replaceUserPermissions,
+  setSetting,
+  setUserActive,
+  triggerAndWaitForLibraryScan,
+  type CreatedLibrary,
+  type LocatedBookFile,
+  type OpdsE2EContext,
+  type TestUserSession,
+} from './e2e/opds/opds-harness';
+
+interface ScenarioRunResult {
+  id: string;
+  status: 'passed' | 'failed';
+  durationMs: number;
+  error?: string;
+}
+
+interface OpdsCredentials {
+  username: string;
+  password: string;
+}
+
+async function writeScenarioReport(results: ScenarioRunResult[]): Promise<void> {
+  const reportDir = process.env.JUNIT_OUTPUT ? dirname(process.env.JUNIT_OUTPUT) : join(process.cwd(), '..', 'test-results', 'server');
+  await mkdir(reportDir, { recursive: true });
+  const reportPath = join(reportDir, 'opds-auth-catalog-e2e-scenarios.json');
+  await writeFile(
+    reportPath,
+    JSON.stringify(
+      {
+        generatedAt: new Date().toISOString(),
+        total: results.length,
+        passed: results.filter((result) => result.status === 'passed').length,
+        failed: results.filter((result) => result.status === 'failed').length,
+        results,
+      },
+      null,
+      2,
+    ),
+  );
+}
+
+describe('OPDS auth and catalog (e2e)', { timeout: 120_000 }, () => {
+  let ctx!: OpdsE2EContext;
+  const scenarioResults: ScenarioRunResult[] = [];
+  let scenarioStartedAt = 0;
+
+  let owner!: TestUserSession;
+  let intruder!: TestUserSession;
+  let disabledParent!: TestUserSession;
+  let revokedParent!: TestUserSession;
+  let noOpdsPermissionUser!: TestUserSession;
+
+  let visibleLibrary!: CreatedLibrary;
+  let hiddenLibrary!: CreatedLibrary;
+
+  let visibleBookAlpha!: LocatedBookFile;
+  let visibleBookBeta!: LocatedBookFile;
+  let hiddenBook!: LocatedBookFile;
+
+  let ownerCredentials!: OpdsCredentials;
+  let disabledCredentials!: OpdsCredentials;
+  let revokedCredentials!: OpdsCredentials;
+
+  let ownerCollectionId!: number;
+  let foreignCollectionId!: number;
+  let ownerLensId!: number;
+  let foreignLensId!: number;
+
+  let visibleAuthorName!: string;
+  let hiddenAuthorName!: string;
+  let visibleSeriesName!: string;
+  let hiddenSeriesName!: string;
+
+  beforeAll(async () => {
+    ctx = await createOpdsE2EContext();
+
+    visibleLibrary = await createLibraryWithFolder(ctx, { name: `opds-visible-library-${randomUUID()}` });
+    hiddenLibrary = await createLibraryWithFolder(ctx, { name: `opds-hidden-library-${randomUUID()}` });
+
+    const visibleAlphaPath = await createEpubFixture(visibleLibrary.folderPath, 'visible-alpha.epub', { title: 'Visible Alpha' });
+    const visibleBetaPath = await createEpubFixture(visibleLibrary.folderPath, 'visible-beta.epub', { title: 'Visible Beta' });
+    const hiddenGammaPath = await createEpubFixture(hiddenLibrary.folderPath, 'hidden-gamma.epub', { title: 'Hidden Gamma' });
+
+    await triggerAndWaitForLibraryScan(ctx, visibleLibrary.libraryId);
+    await triggerAndWaitForLibraryScan(ctx, hiddenLibrary.libraryId);
+
+    visibleBookAlpha = await locateBookByAbsolutePath(ctx, visibleAlphaPath);
+    visibleBookBeta = await locateBookByAbsolutePath(ctx, visibleBetaPath);
+    hiddenBook = await locateBookByAbsolutePath(ctx, hiddenGammaPath);
+
+    await createBookCoverArtifacts(ctx, visibleBookAlpha.bookId);
+    await createBookCoverArtifacts(ctx, visibleBookBeta.bookId);
+    await createBookCoverArtifacts(ctx, hiddenBook.bookId);
+
+    visibleAuthorName = `Visible Author ${randomUUID().slice(0, 8)}`;
+    hiddenAuthorName = `Hidden Author ${randomUUID().slice(0, 8)}`;
+    visibleSeriesName = `Visible Series ${randomUUID().slice(0, 8)}`;
+    hiddenSeriesName = `Hidden Series ${randomUUID().slice(0, 8)}`;
+
+    await seedBookMetadata(visibleBookAlpha.bookId, 'Visible Alpha', visibleSeriesName, 1);
+    await seedBookMetadata(visibleBookBeta.bookId, 'Visible Beta', visibleSeriesName, 2);
+    await seedBookMetadata(hiddenBook.bookId, 'Hidden Gamma', hiddenSeriesName, 1);
+
+    await linkBookAuthor(visibleBookAlpha.bookId, visibleAuthorName);
+    await linkBookAuthor(visibleBookBeta.bookId, visibleAuthorName);
+    await linkBookAuthor(hiddenBook.bookId, hiddenAuthorName);
+
+    owner = await createUserAndLogin(ctx, { permissions: [Permission.OpdsAccess] });
+    intruder = await createUserAndLogin(ctx, { permissions: [Permission.OpdsAccess] });
+    disabledParent = await createUserAndLogin(ctx, { permissions: [Permission.OpdsAccess] });
+    revokedParent = await createUserAndLogin(ctx, { permissions: [Permission.OpdsAccess] });
+    noOpdsPermissionUser = await createUserAndLogin(ctx);
+
+    await grantLibraryAccess(ctx, owner.userId, visibleLibrary.libraryId, 'viewer');
+    await grantLibraryAccess(ctx, intruder.userId, visibleLibrary.libraryId, 'viewer');
+    await grantLibraryAccess(ctx, disabledParent.userId, visibleLibrary.libraryId, 'viewer');
+    await grantLibraryAccess(ctx, revokedParent.userId, visibleLibrary.libraryId, 'viewer');
+
+    const ownerOpds = await createOpdsUserCredential(ctx, {
+      userId: owner.userId,
+      username: `opds-owner-${randomUUID().slice(0, 8)}`,
+      password: 'OwnerOpdsPass123',
+    });
+    const disabledOpds = await createOpdsUserCredential(ctx, {
+      userId: disabledParent.userId,
+      username: `opds-disabled-${randomUUID().slice(0, 8)}`,
+      password: 'DisabledOpdsPass123',
+    });
+    const revokedOpds = await createOpdsUserCredential(ctx, {
+      userId: revokedParent.userId,
+      username: `opds-revoked-${randomUUID().slice(0, 8)}`,
+      password: 'RevokedOpdsPass123',
+    });
+
+    ownerCredentials = { username: ownerOpds.row.username, password: ownerOpds.password };
+    disabledCredentials = { username: disabledOpds.row.username, password: disabledOpds.password };
+    revokedCredentials = { username: revokedOpds.row.username, password: revokedOpds.password };
+
+    await setUserActive(ctx, disabledParent.userId, false);
+    await replaceUserPermissions(ctx, revokedParent.userId, []);
+
+    const [ownerCollection] = await ctx.db
+      .insert(schema.collections)
+      .values({
+        userId: owner.userId,
+        name: `owner-collection-${randomUUID().slice(0, 8)}`,
+      })
+      .returning({ id: schema.collections.id });
+    ownerCollectionId = ownerCollection.id;
+
+    await ctx.db.insert(schema.collectionBooks).values([
+      { collectionId: ownerCollectionId, bookId: visibleBookAlpha.bookId },
+      { collectionId: ownerCollectionId, bookId: visibleBookBeta.bookId },
+    ]);
+
+    const [foreignCollection] = await ctx.db
+      .insert(schema.collections)
+      .values({
+        userId: intruder.userId,
+        name: `foreign-collection-${randomUUID().slice(0, 8)}`,
+      })
+      .returning({ id: schema.collections.id });
+    foreignCollectionId = foreignCollection.id;
+
+    await ctx.db.insert(schema.collectionBooks).values({ collectionId: foreignCollectionId, bookId: visibleBookAlpha.bookId });
+
+    const [ownerLens] = await ctx.db
+      .insert(schema.lenses)
+      .values({
+        userId: owner.userId,
+        name: `owner-lens-${randomUUID().slice(0, 8)}`,
+        filter: null,
+        isPublic: false,
+      })
+      .returning({ id: schema.lenses.id });
+    ownerLensId = ownerLens.id;
+
+    const [foreignLens] = await ctx.db
+      .insert(schema.lenses)
+      .values({
+        userId: intruder.userId,
+        name: `foreign-lens-${randomUUID().slice(0, 8)}`,
+        filter: null,
+        isPublic: false,
+      })
+      .returning({ id: schema.lenses.id });
+    foreignLensId = foreignLens.id;
+
+    await setSetting(ctx, 'opds_enabled', 'true');
+  }, 120_000);
+
+  beforeEach(async () => {
+    scenarioStartedAt = Date.now();
+    await setSetting(ctx, 'opds_enabled', 'true');
+  });
+
+  afterEach((taskContext) => {
+    const result = taskContext.task.result;
+    if (!result) return;
+
+    const state = result.state === 'pass' ? 'passed' : 'failed';
+    const error = result.errors?.[0]?.message;
+    scenarioResults.push({
+      id: taskContext.task.name,
+      status: state,
+      durationMs: Math.max(0, Date.now() - scenarioStartedAt),
+      ...(error ? { error } : {}),
+    });
+  });
+
+  afterAll(async () => {
+    await writeScenarioReport(scenarioResults);
+    if (ctx) {
+      await closeOpdsE2EContext(ctx);
+    }
+  });
+
+  describe('opds-users lifecycle contract', () => {
+    it('supports create list update delete and enforces owner boundaries', async () => {
+      const username = `opds-lifecycle-${randomUUID().slice(0, 8)}`;
+      const createResponse = await ctx.app.inject({
+        method: 'POST',
+        url: '/api/v1/opds-users',
+        headers: authHeader(owner.accessToken),
+        payload: {
+          username,
+          password: 'LifecyclePass123',
+          sortOrder: 'recent',
+        },
+      });
+      expect(createResponse.statusCode).toBe(201);
+      const created = createResponse.json() as { id: number; username: string; sortOrder: string };
+      expect(created).toMatchObject({ username, sortOrder: 'recent' });
+
+      const listResponse = await ctx.app.inject({
+        method: 'GET',
+        url: '/api/v1/opds-users',
+        headers: authHeader(owner.accessToken),
+      });
+      expect(listResponse.statusCode).toBe(200);
+      expect(listResponse.json()).toEqual(expect.arrayContaining([expect.objectContaining({ id: created.id, username })]));
+
+      const updateResponse = await ctx.app.inject({
+        method: 'PATCH',
+        url: `/api/v1/opds-users/${created.id}`,
+        headers: authHeader(owner.accessToken),
+        payload: { sortOrder: 'title_asc' },
+      });
+      expect(updateResponse.statusCode).toBe(200);
+      expect(updateResponse.json()).toEqual(expect.objectContaining({ id: created.id, sortOrder: 'title_asc' }));
+
+      const foreignUpdateResponse = await ctx.app.inject({
+        method: 'PATCH',
+        url: `/api/v1/opds-users/${created.id}`,
+        headers: authHeader(intruder.accessToken),
+        payload: { sortOrder: 'title_desc' },
+      });
+      expectError(foreignUpdateResponse, 403, 'Not the owner');
+
+      const foreignDeleteResponse = await ctx.app.inject({
+        method: 'DELETE',
+        url: `/api/v1/opds-users/${created.id}`,
+        headers: authHeader(intruder.accessToken),
+      });
+      expectError(foreignDeleteResponse, 403, 'Not the owner');
+
+      const deleteResponse = await ctx.app.inject({
+        method: 'DELETE',
+        url: `/api/v1/opds-users/${created.id}`,
+        headers: authHeader(owner.accessToken),
+      });
+      expect(deleteResponse.statusCode).toBe(204);
+
+      const afterDeleteListResponse = await ctx.app.inject({
+        method: 'GET',
+        url: '/api/v1/opds-users',
+        headers: authHeader(owner.accessToken),
+      });
+      expect(afterDeleteListResponse.statusCode).toBe(200);
+      expect(afterDeleteListResponse.json()).not.toEqual(expect.arrayContaining([expect.objectContaining({ id: created.id })]));
+    });
+
+    it('requires opds_access permission for opds-users management', async () => {
+      const response = await ctx.app.inject({
+        method: 'GET',
+        url: '/api/v1/opds-users',
+        headers: authHeader(noOpdsPermissionUser.accessToken),
+      });
+      expect(response.statusCode).toBe(403);
+    });
+
+    it('returns conflict for duplicate OPDS username', async () => {
+      const response = await ctx.app.inject({
+        method: 'POST',
+        url: '/api/v1/opds-users',
+        headers: authHeader(owner.accessToken),
+        payload: {
+          username: ownerCredentials.username,
+          password: 'DuplicatePass123',
+        },
+      });
+      expectError(response, 409, 'already exists');
+    });
+  });
+
+  describe('basic auth and guard behavior', () => {
+    it('rejects all OPDS requests when OPDS is disabled', async () => {
+      await setSetting(ctx, 'opds_enabled', 'false');
+
+      const response = await opdsGet('/api/v1/opds/libraries', ownerCredentials);
+      expectError(response, 403, 'disabled');
+    });
+
+    it('requires Basic auth and returns WWW-Authenticate challenge', async () => {
+      const response = await opdsGet('/api/v1/opds/libraries');
+      expectError(response, 401, 'Basic authentication required');
+      expect(response.headers['www-authenticate']).toContain('Basic realm=');
+    });
+
+    it('rejects invalid Basic credentials with WWW-Authenticate challenge', async () => {
+      const response = await opdsGet('/api/v1/opds/libraries', {
+        username: ownerCredentials.username,
+        password: 'WrongPassword123',
+      });
+      expectError(response, 401, 'Invalid credentials');
+      expect(response.headers['www-authenticate']).toContain('Basic realm=');
+    });
+
+    it('rejects OPDS auth for disabled parent users', async () => {
+      const response = await opdsGet('/api/v1/opds/libraries', disabledCredentials);
+      expectError(response, 401, 'disabled');
+    });
+
+    it('rejects OPDS auth when parent opds_access is revoked', async () => {
+      const response = await opdsGet('/api/v1/opds/libraries', revokedCredentials);
+      expectError(response, 403, 'OPDS access revoked');
+    });
+
+    it('accepts valid Basic credentials and serves OPDS XML', async () => {
+      const response = await opdsGet('/api/v1/opds', ownerCredentials);
+      expect(response.statusCode).toBe(200);
+      expect(response.headers['content-type']).toContain('application/atom+xml;profile=opds-catalog');
+    });
+
+    it('rejects token auth on non-image routes with Basic challenge', async () => {
+      const jwtSecret = ctx.app.get(ConfigService).getOrThrow<string>('auth.jwtSecret');
+      const token = createCoverToken(owner.userId, jwtSecret);
+
+      const response = await opdsGet(`/api/v1/opds/catalog?t=${token}`);
+      expectError(response, 401, 'Basic authentication required');
+      expect(response.headers['www-authenticate']).toContain('Basic realm=');
+    });
+
+    it('rejects invalid token auth on image routes', async () => {
+      const response = await opdsGet(`/api/v1/opds/${visibleBookAlpha.bookId}/cover?t=not-a-valid-token`);
+      expectError(response, 401, 'Invalid token');
+    });
+  });
+
+  describe('catalog/feed contract', () => {
+    it('serves root navigation and search description with expected MIME and links', async () => {
+      const rootResponse = await opdsGet('/api/v1/opds', ownerCredentials);
+      expect(rootResponse.statusCode).toBe(200);
+      expect(rootResponse.headers['content-type']).toContain('application/atom+xml;profile=opds-catalog');
+      expect(rootResponse.body).toContain('/api/v1/opds/catalog');
+      expect(rootResponse.body).toContain('/api/v1/opds/recent');
+      expect(rootResponse.body).toContain('/api/v1/opds/surprise');
+      expect(rootResponse.body).toContain('/api/v1/opds/libraries');
+      expect(rootResponse.body).toContain('/api/v1/opds/search.opds');
+
+      const searchResponse = await opdsGet('/api/v1/opds/search.opds', ownerCredentials);
+      expect(searchResponse.statusCode).toBe(200);
+      expect(searchResponse.headers['content-type']).toContain('application/opensearchdescription+xml');
+      expect(searchResponse.body).toContain('/api/v1/opds/catalog?q={searchTerms}');
+    });
+
+    it('scopes libraries, collections, lenses, authors, and series to the authenticated parent user', async () => {
+      const librariesResponse = await opdsGet('/api/v1/opds/libraries', ownerCredentials);
+      expect(librariesResponse.statusCode).toBe(200);
+      expect(librariesResponse.body).toContain(`libraryId=${visibleLibrary.libraryId}`);
+      expect(librariesResponse.body).not.toContain(`libraryId=${hiddenLibrary.libraryId}`);
+
+      const collectionsResponse = await opdsGet('/api/v1/opds/collections', ownerCredentials);
+      expect(collectionsResponse.statusCode).toBe(200);
+      expect(collectionsResponse.body).toContain(`collectionId=${ownerCollectionId}`);
+      expect(collectionsResponse.body).not.toContain(`collectionId=${foreignCollectionId}`);
+
+      const lensesResponse = await opdsGet('/api/v1/opds/lenses', ownerCredentials);
+      expect(lensesResponse.statusCode).toBe(200);
+      expect(lensesResponse.body).toContain(`lensId=${ownerLensId}`);
+      expect(lensesResponse.body).not.toContain(`lensId=${foreignLensId}`);
+
+      const authorsResponse = await opdsGet('/api/v1/opds/authors', ownerCredentials);
+      expect(authorsResponse.statusCode).toBe(200);
+      expect(authorsResponse.body).toContain(visibleAuthorName);
+      expect(authorsResponse.body).not.toContain(hiddenAuthorName);
+
+      const seriesResponse = await opdsGet('/api/v1/opds/series', ownerCredentials);
+      expect(seriesResponse.statusCode).toBe(200);
+      expect(seriesResponse.body).toContain(visibleSeriesName);
+      expect(seriesResponse.body).not.toContain(hiddenSeriesName);
+    });
+
+    it('enforces catalog pagination, filters, and strict query validation', async () => {
+      const page1Response = await opdsGet('/api/v1/opds/catalog?page=1&size=1', ownerCredentials);
+      expect(page1Response.statusCode).toBe(200);
+      expect(page1Response.headers['content-type']).toContain('application/atom+xml;profile=opds-catalog');
+      expect(page1Response.body).toContain('<opensearch:totalResults>2</opensearch:totalResults>');
+      expect(page1Response.body).toContain('rel="next"');
+      expect(page1Response.body).not.toContain('rel="previous"');
+
+      const page2Response = await opdsGet('/api/v1/opds/catalog?page=2&size=1', ownerCredentials);
+      expect(page2Response.statusCode).toBe(200);
+      expect(page2Response.body).toContain('rel="previous"');
+
+      const ownerLibraryResponse = await opdsGet(`/api/v1/opds/catalog?libraryId=${visibleLibrary.libraryId}`, ownerCredentials);
+      expect(ownerLibraryResponse.statusCode).toBe(200);
+      expect(ownerLibraryResponse.body).toContain('Visible Alpha');
+
+      const forbiddenLibraryResponse = await opdsGet(`/api/v1/opds/catalog?libraryId=${hiddenLibrary.libraryId}`, ownerCredentials);
+      expectError(forbiddenLibraryResponse, 403, 'No access to this library');
+
+      const invalidLibraryFilterResponse = await opdsGet('/api/v1/opds/catalog?libraryId=abc', ownerCredentials);
+      expectError(invalidLibraryFilterResponse, 400, 'libraryId must be a positive integer');
+
+      const invalidCollectionFilterResponse = await opdsGet('/api/v1/opds/catalog?collectionId=oops', ownerCredentials);
+      expectError(invalidCollectionFilterResponse, 400, 'collectionId must be a positive integer');
+
+      const invalidLensFilterResponse = await opdsGet('/api/v1/opds/catalog?lensId=bad', ownerCredentials);
+      expectError(invalidLensFilterResponse, 400, 'lensId must be a positive integer');
+
+      const foreignCollectionResponse = await opdsGet(`/api/v1/opds/catalog?collectionId=${foreignCollectionId}`, ownerCredentials);
+      expectError(foreignCollectionResponse, 403, 'No access to this collection');
+
+      const ownerCollectionResponse = await opdsGet(`/api/v1/opds/catalog?collectionId=${ownerCollectionId}`, ownerCredentials);
+      expect(ownerCollectionResponse.statusCode).toBe(200);
+      expect(ownerCollectionResponse.body).toContain('Visible Alpha');
+
+      const ownerLensResponse = await opdsGet(`/api/v1/opds/catalog?lensId=${ownerLensId}`, ownerCredentials);
+      expect(ownerLensResponse.statusCode).toBe(200);
+      expect(ownerLensResponse.body).toContain('<opensearch:totalResults>2</opensearch:totalResults>');
+
+      const foreignLensResponse = await opdsGet(`/api/v1/opds/catalog?lensId=${foreignLensId}`, ownerCredentials);
+      expect(foreignLensResponse.statusCode).toBe(200);
+      expect(foreignLensResponse.body).toContain('<opensearch:totalResults>0</opensearch:totalResults>');
+
+      const searchResponse = await opdsGet('/api/v1/opds/catalog?q=Visible Alpha', ownerCredentials);
+      expect(searchResponse.statusCode).toBe(200);
+      expect(searchResponse.body).toContain('Visible Alpha');
+      expect(searchResponse.body).not.toContain('Visible Beta');
+    });
+  });
+
+  describe('tokenized image access and download behavior', () => {
+    it('allows feed-issued token access for cover and thumbnail with ETag handling', async () => {
+      const catalogResponse = await opdsGet('/api/v1/opds/catalog?page=1&size=10', ownerCredentials);
+      expect(catalogResponse.statusCode).toBe(200);
+      const coverToken = extractCoverToken(catalogResponse.body, visibleBookAlpha.bookId);
+
+      const coverResponse = await opdsGet(`/api/v1/opds/${visibleBookAlpha.bookId}/cover?t=${encodeURIComponent(coverToken)}`);
+      expect(coverResponse.statusCode).toBe(200);
+      expect(coverResponse.headers['content-type']).toContain('image/jpeg');
+      expect(coverResponse.headers.etag).toBeTruthy();
+
+      const notModifiedCoverResponse = await ctx.app.inject({
+        method: 'GET',
+        url: `/api/v1/opds/${visibleBookAlpha.bookId}/cover?t=${encodeURIComponent(coverToken)}`,
+        headers: {
+          'if-none-match': String(coverResponse.headers.etag),
+        },
+      });
+      expect(notModifiedCoverResponse.statusCode).toBe(304);
+
+      const thumbnailResponse = await opdsGet(`/api/v1/opds/${visibleBookAlpha.bookId}/thumbnail?t=${encodeURIComponent(coverToken)}`);
+      expect(thumbnailResponse.statusCode).toBe(200);
+      expect(thumbnailResponse.headers['content-type']).toContain('image/jpeg');
+      expect(thumbnailResponse.headers.etag).toBeTruthy();
+    });
+
+    it('keeps tokenized image access scoped to the parent user library access', async () => {
+      const catalogResponse = await opdsGet('/api/v1/opds/catalog?page=1&size=10', ownerCredentials);
+      expect(catalogResponse.statusCode).toBe(200);
+      const coverToken = extractCoverToken(catalogResponse.body, visibleBookAlpha.bookId);
+
+      const hiddenCoverResponse = await opdsGet(`/api/v1/opds/${hiddenBook.bookId}/cover?t=${encodeURIComponent(coverToken)}`);
+      expectError(hiddenCoverResponse, 403, 'No access to this book');
+    });
+
+    it('requires Basic auth for downloads and enforces file/book access boundaries', async () => {
+      const catalogResponse = await opdsGet('/api/v1/opds/catalog?page=1&size=10', ownerCredentials);
+      expect(catalogResponse.statusCode).toBe(200);
+      const coverToken = extractCoverToken(catalogResponse.body, visibleBookAlpha.bookId);
+
+      const tokenDownloadResponse = await opdsGet(`/api/v1/opds/${visibleBookAlpha.bookId}/download?t=${encodeURIComponent(coverToken)}`);
+      expectError(tokenDownloadResponse, 401, 'Basic authentication required');
+      expect(tokenDownloadResponse.headers['www-authenticate']).toContain('Basic realm=');
+
+      const validDownloadResponse = await opdsGet(
+        `/api/v1/opds/${visibleBookAlpha.bookId}/download?fileId=${visibleBookAlpha.bookFileId}`,
+        ownerCredentials,
+      );
+      expect(validDownloadResponse.statusCode).toBe(200);
+      expect(validDownloadResponse.headers['content-type']).toContain('application/epub+zip');
+      expect(validDownloadResponse.headers['content-disposition']).toContain('attachment;');
+
+      const badFileIdResponse = await opdsGet(`/api/v1/opds/${visibleBookAlpha.bookId}/download?fileId=999999`, ownerCredentials);
+      expectError(badFileIdResponse, 404, 'File not found');
+
+      const forbiddenBookDownloadResponse = await opdsGet(
+        `/api/v1/opds/${hiddenBook.bookId}/download?fileId=${hiddenBook.bookFileId}`,
+        ownerCredentials,
+      );
+      expectError(forbiddenBookDownloadResponse, 403, 'No access to this book');
+    });
+  });
+
+  async function seedBookMetadata(bookId: number, title: string, seriesName: string, seriesIndex: number): Promise<void> {
+    await ctx.db.insert(schema.bookMetadata).values({ bookId, title, seriesName, seriesIndex }).onConflictDoUpdate({
+      target: schema.bookMetadata.bookId,
+      set: { title, seriesName, seriesIndex },
+    });
+  }
+
+  async function linkBookAuthor(bookId: number, authorName: string): Promise<void> {
+    const inserted = await ctx.db.insert(schema.authors).values({ name: authorName }).onConflictDoNothing().returning({ id: schema.authors.id });
+
+    let authorId = inserted[0]?.id;
+    if (!authorId) {
+      const [existing] = await ctx.db.select({ id: schema.authors.id }).from(schema.authors).where(eq(schema.authors.name, authorName)).limit(1);
+      if (!existing) throw new Error(`Author lookup failed for ${authorName}`);
+      authorId = existing.id;
+    }
+
+    await ctx.db.insert(schema.bookAuthors).values({ bookId, authorId, displayOrder: 0 }).onConflictDoNothing();
+  }
+
+  async function opdsGet(path: string, credentials?: OpdsCredentials) {
+    return ctx.app.inject({
+      method: 'GET',
+      url: path,
+      headers: credentials ? { authorization: basicAuth(credentials.username, credentials.password) } : undefined,
+    });
+  }
+
+  function extractCoverToken(feedXml: string, bookId: number): string {
+    const tokenMatch = feedXml.match(new RegExp(`/api/v1/opds/${bookId}/cover\\?t=([^"&<]+)`));
+    if (!tokenMatch?.[1]) {
+      throw new Error(`Expected to find feed-issued cover token for book ${bookId}`);
+    }
+    return decodeURIComponent(tokenMatch[1]);
+  }
+
+  function expectError(response: Awaited<ReturnType<OpdsE2EContext['app']['inject']>>, statusCode: number, messageFragment: string): void {
+    expect(response.statusCode).toBe(statusCode);
+    const body = parseBody(response);
+    if (body && typeof body === 'object') {
+      expect(body).toEqual(
+        expect.objectContaining({
+          statusCode,
+        }),
+      );
+    }
+    expect(extractMessage(response)).toContain(messageFragment);
+  }
+
+  function parseBody(response: Awaited<ReturnType<OpdsE2EContext['app']['inject']>>): Record<string, unknown> | null {
+    try {
+      return response.json() as Record<string, unknown>;
+    } catch {
+      return null;
+    }
+  }
+
+  function extractMessage(response: Awaited<ReturnType<OpdsE2EContext['app']['inject']>>): string {
+    const body = parseBody(response);
+    if (!body) return response.body;
+    const message = body.message;
+    if (typeof message === 'string') return message;
+    if (Array.isArray(message)) {
+      return message.filter((item): item is string => typeof item === 'string').join('; ');
+    }
+    return '';
+  }
+});