diff --git a/apps/manacore/apps/landing/src/content/config.ts b/apps/manacore/apps/landing/src/content/config.ts
index 2168f52d3..e3ca1f7e6 100644
--- a/apps/manacore/apps/landing/src/content/config.ts
+++ b/apps/manacore/apps/landing/src/content/config.ts
@@ -228,6 +228,31 @@ const manascoreCollection = defineCollection({
 				lastChecked: z.string().optional(), // ISO date
 			})
 			.optional(),
+		// API conformity checks
+		apiConformity: z
+			.object({
+				consistentResponses: z.boolean(), // Uses ApiResult<T> format
+				errorCodes: z.boolean(), // Consistent HTTP error codes
+				pagination: z.boolean(), // Supports pagination where needed
+				versioning: z.boolean(), // API versioning (/api/v1/)
+				documentation: z.boolean(), // Swagger/OpenAPI docs
+				healthEndpoint: z.boolean(), // /health endpoint
+				validation: z.boolean(), // DTO validation on all inputs
+			})
+			.optional(),
+		// Cross-app consistency (shared package usage)
+		consistency: z
+			.object({
+				sharedAuth: z.boolean(), // Uses @manacore/shared-nestjs-auth or nestjs-integration
+				sharedUi: z.boolean(), // Uses @manacore/shared-ui components
+				sharedTheme: z.boolean(), // Uses @manacore/shared-theme
+				sharedBranding: z.boolean(), // Uses @manacore/shared-branding
+				sharedI18n: z.boolean(), // Uses @manacore/shared-i18n
+				sharedErrorTracking: z.boolean(), // Uses @manacore/shared-error-tracking
+				sharedStorage: z.boolean().optional(), // Uses @manacore/shared-storage (if applicable)
+				sharedLlm: z.boolean().optional(), // Uses @manacore/shared-llm (if applicable)
+			})
+			.optional(),
 		// Score history for trend visualization
 		history: z
 			.array(
diff --git a/apps/manacore/apps/landing/src/content/manascore/2026-03-19-calendar.md b/apps/manacore/apps/landing/src/content/manascore/2026-03-19-calendar.md
index 33891dde3..0327052c8 100644
--- a/apps/manacore/apps/landing/src/content/manascore/2026-03-19-calendar.md
+++ b/apps/manacore/apps/landing/src/content/manascore/2026-03-19-calendar.md
@@ -18,6 +18,23 @@ scores:
   documentation: 98
   security: 92
   ux: 95
+apiConformity:
+  consistentResponses: true
+  errorCodes: true
+  pagination: true
+  versioning: true
+  documentation: true
+  healthEndpoint: true
+  validation: true
+consistency:
+  sharedAuth: true
+  sharedUi: true
+  sharedTheme: true
+  sharedBranding: true
+  sharedI18n: true
+  sharedErrorTracking: true
+  sharedStorage: false
+  sharedLlm: false
 dependencies:
   total: 42
   outdated: 9
diff --git a/apps/manacore/apps/landing/src/content/manascore/2026-03-19-todo.md b/apps/manacore/apps/landing/src/content/manascore/2026-03-19-todo.md
index ec14546af..f60223b49 100644
--- a/apps/manacore/apps/landing/src/content/manascore/2026-03-19-todo.md
+++ b/apps/manacore/apps/landing/src/content/manascore/2026-03-19-todo.md
@@ -18,6 +18,23 @@ scores:
   documentation: 95
   security: 90
   ux: 94
+apiConformity:
+  consistentResponses: true
+  errorCodes: true
+  pagination: false
+  versioning: true
+  documentation: true
+  healthEndpoint: true
+  validation: true
+consistency:
+  sharedAuth: true
+  sharedUi: true
+  sharedTheme: true
+  sharedBranding: true
+  sharedI18n: true
+  sharedErrorTracking: true
+  sharedStorage: false
+  sharedLlm: false
 dependencies:
   total: 38
   outdated: 9
diff --git a/apps/manacore/apps/landing/src/pages/manascore/[slug].astro b/apps/manacore/apps/landing/src/pages/manascore/[slug].astro
index ccc23e7e1..8af427be0 100644
--- a/apps/manacore/apps/landing/src/pages/manascore/[slug].astro
+++ b/apps/manacore/apps/landing/src/pages/manascore/[slug].astro
@@ -274,6 +274,108 @@ function getBarColor(score: number): string {
 						})()
 				}
 
+				{/* API Conformity */}
+				{
+					audit.data.apiConformity &&
+						(() => {
+							const api = audit.data.apiConformity;
+							const checks = [
+								{
+									key: 'Konsistente Responses',
+									value: api.consistentResponses,
+									desc: 'ApiResult<T>',
+								},
+								{ key: 'Error Codes', value: api.errorCodes, desc: 'HTTP Status' },
+								{ key: 'Pagination', value: api.pagination, desc: 'Offset/Cursor' },
+								{ key: 'Versioning', value: api.versioning, desc: '/api/v1/' },
+								{ key: 'Dokumentation', value: api.documentation, desc: 'Swagger' },
+								{ key: 'Health Endpoint', value: api.healthEndpoint, desc: '/health' },
+								{ key: 'Validation', value: api.validation, desc: 'DTO' },
+							];
+							const passed = checks.filter((c) => c.value).length;
+
+							return (
+								<div class="border-border/50 mb-8 rounded-xl border bg-gradient-to-br from-white/5 to-white/[0.02] p-6">
+									<div class="flex items-center justify-between mb-4">
+										<div>
+											<h2 class="text-foreground text-sm font-semibold">API Conformity</h2>
+											<p class="text-muted-foreground text-xs">Konsistenz der Backend-API</p>
+										</div>
+										<span
+											class={`text-lg font-bold ${passed === checks.length ? 'text-emerald-500' : 'text-yellow-500'}`}
+										>
+											{passed}/{checks.length}
+										</span>
+									</div>
+									<div class="grid grid-cols-1 gap-2 sm:grid-cols-2">
+										{checks.map(({ key, value, desc }) => (
+											<div class="flex items-center gap-2">
+												<span class={`text-sm ${value ? 'text-emerald-500' : 'text-red-500'}`}>
+													{value ? '✓' : '✗'}
+												</span>
+												<span class="text-foreground text-xs font-medium">{key}</span>
+												<span class="text-muted-foreground/60 text-[10px]">({desc})</span>
+											</div>
+										))}
+									</div>
+								</div>
+							);
+						})()
+				}
+
+				{/* Cross-App Consistency */}
+				{
+					audit.data.consistency &&
+						(() => {
+							const c = audit.data.consistency;
+							const packages = [
+								{ key: 'shared-auth', used: c.sharedAuth, req: true },
+								{ key: 'shared-ui', used: c.sharedUi, req: true },
+								{ key: 'shared-theme', used: c.sharedTheme, req: true },
+								{ key: 'shared-branding', used: c.sharedBranding, req: true },
+								{ key: 'shared-i18n', used: c.sharedI18n, req: true },
+								{ key: 'shared-error-tracking', used: c.sharedErrorTracking, req: true },
+								{ key: 'shared-storage', used: c.sharedStorage ?? false, req: false },
+								{ key: 'shared-llm', used: c.sharedLlm ?? false, req: false },
+							];
+							const core = packages.filter((p) => p.req);
+							const coreUsed = core.filter((p) => p.used).length;
+
+							return (
+								<div class="border-border/50 mb-8 rounded-xl border bg-gradient-to-br from-white/5 to-white/[0.02] p-6">
+									<div class="flex items-center justify-between mb-4">
+										<div>
+											<h2 class="text-foreground text-sm font-semibold">Cross-App Consistency</h2>
+											<p class="text-muted-foreground text-xs">Nutzung der shared Packages</p>
+										</div>
+										<span
+											class={`text-lg font-bold ${coreUsed === core.length ? 'text-emerald-500' : 'text-yellow-500'}`}
+										>
+											{coreUsed}/{core.length} Core
+										</span>
+									</div>
+									<div class="grid grid-cols-2 gap-2 sm:grid-cols-4">
+										{packages.map(({ key, used, req }) => (
+											<div
+												class={`rounded-lg border p-2 text-center ${used ? 'border-emerald-500/30 bg-emerald-500/5' : req ? 'border-red-500/30 bg-red-500/5' : 'border-border/30'}`}
+											>
+												<span
+													class={`text-sm ${used ? 'text-emerald-500' : req ? 'text-red-500' : 'text-muted-foreground/50'}`}
+												>
+													{used ? '✓' : req ? '✗' : '—'}
+												</span>
+												<span class="text-[10px] block text-muted-foreground mt-0.5">{key}</span>
+												{!req && (
+													<span class="text-[8px] text-muted-foreground/50 block">optional</span>
+												)}
+											</div>
+										))}
+									</div>
+								</div>
+							);
+						})()
+				}
+
 				{/* Dependency Health */}
 				{
 					audit.data.dependencies &&
diff --git a/apps/manacore/apps/landing/src/pages/manascore/index.astro b/apps/manacore/apps/landing/src/pages/manascore/index.astro
index 27d3be9bf..e045ce106 100644
--- a/apps/manacore/apps/landing/src/pages/manascore/index.astro
+++ b/apps/manacore/apps/landing/src/pages/manascore/index.astro
@@ -172,6 +172,51 @@ const statuses = [...new Set(sortedAudits.map((a) => a.data.status))];
 											))}
 										</div>
 
+										{/* API & Consistency badges */}
+										{(data.apiConformity || data.consistency) && (
+											<div class="mt-1.5 flex items-center gap-3">
+												{data.apiConformity &&
+													(() => {
+														const api = data.apiConformity;
+														const passed = [
+															api.consistentResponses,
+															api.errorCodes,
+															api.pagination,
+															api.versioning,
+															api.documentation,
+															api.healthEndpoint,
+															api.validation,
+														].filter(Boolean).length;
+														return (
+															<span
+																class={`text-[10px] font-medium ${passed === 7 ? 'text-emerald-500' : 'text-yellow-500'}`}
+															>
+																API: {passed}/7
+															</span>
+														);
+													})()}
+												{data.consistency &&
+													(() => {
+														const c = data.consistency;
+														const core = [
+															c.sharedAuth,
+															c.sharedUi,
+															c.sharedTheme,
+															c.sharedBranding,
+															c.sharedI18n,
+															c.sharedErrorTracking,
+														].filter(Boolean).length;
+														return (
+															<span
+																class={`text-[10px] font-medium ${core === 6 ? 'text-emerald-500' : 'text-yellow-500'}`}
+															>
+																Shared: {core}/6
+															</span>
+														);
+													})()}
+											</div>
+										)}
+
 										{/* Dependency health */}
 										{data.dependencies &&
 											(() => {