diff --git a/apps/api/src/tenders/tenders.controller.spec.ts b/apps/api/src/tenders/tenders.controller.spec.ts
index c9d41f6..3c7e9fb 100644
--- a/apps/api/src/tenders/tenders.controller.spec.ts
+++ b/apps/api/src/tenders/tenders.controller.spec.ts
@@ -24,6 +24,18 @@ function makeFakePrisma() {
     title: 'Beispielausschreibung',
     status: 'active',
     sourcePortal: 'doe-opendata',
+    sources: [
+      {
+        sourcePortal: 'doe-opendata',
+        sourceUrl: 'https://doe.example/t1',
+        sourceNoticeId: 'doe-1',
+      },
+      {
+        sourcePortal: 'cosinex-dtvp',
+        sourceUrl: 'https://dtvp.example/t1',
+        sourceNoticeId: 'dtvp-1',
+      },
+    ],
   });
   const configs = new Map<string, any>();
   configs.set('doe-opendata', {
@@ -147,6 +159,40 @@ describe('TendersController — global read (not tenant-scoped)', () => {
     expect(callArgs.where).toEqual({ id: 't1' });
   });
 
+  it('GET /:id includes the sources relation so the response carries all TenderSource links (13-06, SCHEMA-03)', async () => {
+    const prisma = makeFakePrisma();
+    const scheduler = { setInterval: vi.fn(), stopJob: vi.fn() } as any;
+    const triageService = makeFakeTriageService();
+    const controller = new TendersController(
+      prisma as any,
+      scheduler,
+      triageService as any,
+      makeFakeSavedSearchService() as any,
+      makeFakeNotificationPrefService() as any,
+    );
+
+    const result = await controller.getTender('t1');
+
+    const callArgs = prisma.tender.findUnique.mock.calls[0][0];
+    expect(callArgs.include).toEqual({
+      sources: {
+        select: { sourcePortal: true, sourceUrl: true, sourceNoticeId: true },
+      },
+    });
+    expect(result.sources).toEqual([
+      {
+        sourcePortal: 'doe-opendata',
+        sourceUrl: 'https://doe.example/t1',
+        sourceNoticeId: 'doe-1',
+      },
+      {
+        sourcePortal: 'cosinex-dtvp',
+        sourceUrl: 'https://dtvp.example/t1',
+        sourceNoticeId: 'dtvp-1',
+      },
+    ]);
+  });
+
   it('GET /:id throws NotFoundException for a missing id', async () => {
     const prisma = makeFakePrisma();
     const scheduler = { setInterval: vi.fn(), stopJob: vi.fn() } as any;
diff --git a/apps/api/src/tenders/tenders.controller.ts b/apps/api/src/tenders/tenders.controller.ts
index f82826c..8416ce3 100644
--- a/apps/api/src/tenders/tenders.controller.ts
+++ b/apps/api/src/tenders/tenders.controller.ts
@@ -343,11 +343,25 @@ export class TendersController {
    * GET /modules/tender-radar/:id — single tender detail.
    * Gated by @UseModule('tender-radar'); NOT scoped by the tenant's id
    * (global row).
+   *
+   * D-03/SCHEMA-03 (13-06): includes the `sources` relation (TenderSource
+   * rows) so a cross-source-deduplicated tender surfaces links to ALL of
+   * its source portals, not just the single primary `sourceUrl` column.
+   * `select` is scoped to the three display fields the frontend needs —
+   * no `id`/`createdAt` leak, same minimal-surface convention as
+   * `getCoverage`'s groupBy projection.
    */
   @Get(':id')
   @UseModule('tender-radar')
   async getTender(@Param('id') id: string) {
-    const tender = await this.prisma.tender.findUnique({ where: { id } });
+    const tender = await this.prisma.tender.findUnique({
+      where: { id },
+      include: {
+        sources: {
+          select: { sourcePortal: true, sourceUrl: true, sourceNoticeId: true },
+        },
+      },
+    });
     if (!tender) {
       throw new NotFoundException('Tender not found');
     }