diff --git a/client/landing/stepper/declarative-flow/internals/steps-repository/pattern-assembler/hooks/use-assembler-patterns.ts b/client/landing/stepper/declarative-flow/internals/steps-repository/pattern-assembler/hooks/use-assembler-patterns.ts
index b7c67201a79025..bd8937b8cc6d58 100644
--- a/client/landing/stepper/declarative-flow/internals/steps-repository/pattern-assembler/hooks/use-assembler-patterns.ts
+++ b/client/landing/stepper/declarative-flow/internals/steps-repository/pattern-assembler/hooks/use-assembler-patterns.ts
@@ -9,7 +9,7 @@ const useAssemblerPatterns = (
 	queryOptions: Omit< UseQueryOptions< any, unknown, Pattern[] >, 'queryKey' > = {}
 ): Pattern[] => {
 	const { data } = useQuery< any, unknown, Pattern[] >( {
-		queryKey: [ 'patterns', 'assembler', lang ],
+		queryKey: [ 'pattern-assembler', lang ],
 		queryFn: () => {
 			return wpcomRequest( {
 				path: `/ptk/patterns/${ lang }`,
diff --git a/client/my-sites/patterns/components/grid-gallery/index.tsx b/client/my-sites/patterns/components/grid-gallery/index.tsx
index 55621f0a76e0bb..e2207aebe9d970 100644
--- a/client/my-sites/patterns/components/grid-gallery/index.tsx
+++ b/client/my-sites/patterns/components/grid-gallery/index.tsx
@@ -1,5 +1,4 @@
 import { PatternsSection } from 'calypso/my-sites/patterns/components/section';
-import type { CSSProperties } from 'react';
 
 import './style.scss';
 
@@ -9,7 +8,7 @@ type PatternsGridGalleryProps = {
 	columnCount?: number;
 	list?: {
 		name?: string;
-		label?: string;
+		label: string;
 		number: number;
 		image: string;
 		link: string;
@@ -30,14 +29,14 @@ export const PatternsGridGallery = ( {
 		<PatternsSection title={ title } description={ description }>
 			<div
 				className="patterns-grid-gallery"
-				style={ { '--column-count': columnCount } as CSSProperties }
+				style={ { '--column-count': columnCount } as React.CSSProperties }
 			>
 				{ list.map( ( { name, label, number, image, link } ) => (
 					<a className="patterns-grid-gallery__item" href={ link } key={ name }>
 						<div className="patterns-grid-gallery__item-image">
 							<img src={ image } alt={ label } />
 						</div>
-						<div className="patterns-grid-gallery__item-name">{ name }</div>
+						<div className="patterns-grid-gallery__item-name">{ label }</div>
 						<div className="patterns-grid-gallery__item-number">{ number } patterns</div>
 					</a>
 				) ) }
diff --git a/client/my-sites/patterns/controller.tsx b/client/my-sites/patterns/controller.tsx
index 91dba9fc0d3d9c..88834c1372f12f 100644
--- a/client/my-sites/patterns/controller.tsx
+++ b/client/my-sites/patterns/controller.tsx
@@ -1,7 +1 @@
-import { PATTERN_CATEGORIES } from 'calypso/my-sites/patterns/hooks/use-pattern-categories';
-
 export const RENDERER_SITE_ID = 226011606; // assemblerdemo
-
-export function getPatternCategorySlugs() {
-	return PATTERN_CATEGORIES.join( '|' );
-}
diff --git a/client/my-sites/patterns/home/index.tsx b/client/my-sites/patterns/home/index.tsx
index ea44562d97e324..b84f667c0f2ab7 100644
--- a/client/my-sites/patterns/home/index.tsx
+++ b/client/my-sites/patterns/home/index.tsx
@@ -6,7 +6,6 @@ import { PatternsGetStarted } from 'calypso/my-sites/patterns/components/get-sta
 import { PatternsGridGallery } from 'calypso/my-sites/patterns/components/grid-gallery';
 import { PatternsHeader } from 'calypso/my-sites/patterns/components/header';
 import { PatternsSection } from 'calypso/my-sites/patterns/components/section';
-import { RENDERER_SITE_ID } from 'calypso/my-sites/patterns/controller';
 import { usePatternCategories } from 'calypso/my-sites/patterns/hooks/use-pattern-categories';
 import { usePatterns } from 'calypso/my-sites/patterns/hooks/use-patterns';
 import { useSelector } from 'calypso/state';
@@ -35,7 +34,7 @@ export const PatternsHomePage = ( {
 	const locale = useLocale();
 	const isLoggedIn = useSelector( isUserLoggedIn );
 
-	const { data: categories } = usePatternCategories( locale, RENDERER_SITE_ID );
+	const { data: categories } = usePatternCategories( locale );
 	const { data: patterns } = usePatterns( locale, category );
 
 	return (
@@ -56,11 +55,12 @@ export const PatternsHomePage = ( {
 					list={ categories?.map( ( category ) => ( {
 						name: category.name,
 						label: category.label,
-						number: 15,
+						number: category.regularPatternCount,
 						image: ImgPattern,
 						link: `/patterns/${ category.name }`,
 					} ) ) }
 				/>
+
 				<PatternGallery patterns={ patterns } isGridView={ isGridView } />
 
 				<PatternsSection
@@ -116,12 +116,15 @@ export const PatternsHomePage = ( {
 					title="Beautifully curated page layouts"
 					description="Entire pages built of patterns, ready to be added to your site."
 					columnCount={ 3 }
-					list={ Array.from( Array( 5 ) ).map( () => ( {
-						name: 'About',
-						number: 7,
-						image: ImgLayout,
-						link: '#',
-					} ) ) }
+					list={ categories
+						?.filter( ( { pagePatternCount } ) => pagePatternCount )
+						.map( ( category ) => ( {
+							name: category.name,
+							label: category.label,
+							number: category.pagePatternCount,
+							image: ImgLayout,
+							link: `/patterns/${ category.name }`,
+						} ) ) }
 				/>
 
 				<PatternsGetStarted />
diff --git a/client/my-sites/patterns/hooks/test/use-pattern-categories.tsx b/client/my-sites/patterns/hooks/test/use-pattern-categories.tsx
index 960f4ae1c991b9..998cfe70b46cd5 100644
--- a/client/my-sites/patterns/hooks/test/use-pattern-categories.tsx
+++ b/client/my-sites/patterns/hooks/test/use-pattern-categories.tsx
@@ -30,14 +30,11 @@ describe( 'usePatternCategories', () => {
 	test( 'calls the API endpoint with the right parameters', async () => {
 		( wpcom.req.get as jest.MockedFunction< typeof wpcom.req.get > ).mockResolvedValue( [] );
 
-		const { result } = renderHook( () => usePatternCategories( 'fr', 12345 ), { wrapper } );
+		const { result } = renderHook( () => usePatternCategories( 'fr' ), { wrapper } );
 
 		await waitFor( () => expect( result.current.isSuccess ).toBe( true ) );
 
-		expect( wpcom.req.get ).toHaveBeenCalledWith( '/sites/12345/block-patterns/categories', {
-			apiNamespace: 'wp/v2',
-			_locale: 'fr',
-		} );
+		expect( wpcom.req.get ).toHaveBeenCalledWith( '/ptk/categories/fr' );
 		expect( result.current.data ).toEqual( [] );
 	} );
 
@@ -54,7 +51,7 @@ describe( 'usePatternCategories', () => {
 			categories
 		);
 
-		const { result } = renderHook( () => usePatternCategories( 'fr', 12345 ), { wrapper } );
+		const { result } = renderHook( () => usePatternCategories( 'fr' ), { wrapper } );
 
 		await waitFor( () => expect( result.current.isSuccess ).toBe( true ) );
 
diff --git a/client/my-sites/patterns/hooks/use-pattern-categories.ts b/client/my-sites/patterns/hooks/use-pattern-categories.ts
index b13eade6349320..8aa44b256a6715 100644
--- a/client/my-sites/patterns/hooks/use-pattern-categories.ts
+++ b/client/my-sites/patterns/hooks/use-pattern-categories.ts
@@ -1,75 +1,34 @@
 import { useQuery, UseQueryOptions } from '@tanstack/react-query';
 import wpcom from 'calypso/lib/wp';
-import type { Category } from 'calypso/my-sites/patterns/types';
-
-export const PATTERN_CATEGORIES = [
-	'featured',
-	'intro',
-	'about',
-	// 'buttons',
-	// 'banner',
-	// 'query',
-	'blog',
-	'posts',
-	// 'call-to-action',
-	// 'columns',
-	// 'coming-soon',
-	'contact',
-	'footer',
-	'forms',
-	'gallery',
-	'header',
-	// 'link-in-bio',
-	// 'media',
-	'newsletter',
-	// 'podcast',
-	'portfolio', // For page patterns only in v1
-	// 'quotes',
-	'services',
-	'store',
-	// 'team',
-	'testimonials', // Reused as "Quotes"
-	// 'text',
-];
+import type { Category, CategorySnakeCase } from 'calypso/my-sites/patterns/types';
 
 export function getPatternCategoriesQueryOptions(
 	locale: string,
-	siteId: undefined | number,
 	queryOptions: Omit< UseQueryOptions< Category[] >, 'queryKey' > = {}
 ): UseQueryOptions< Category[] > {
 	return {
-		queryKey: [ locale, siteId, 'pattern-library', 'categories' ],
+		queryKey: [ 'pattern-library', 'categories', locale ],
 		queryFn() {
-			return wpcom.req.get(
-				`/sites/${ encodeURIComponent( siteId ?? '' ) }/block-patterns/categories`,
-				{
-					apiNamespace: 'wp/v2',
-					_locale: locale,
-				}
-			);
-		},
-		select( categories ) {
-			const result = [];
-
-			for ( const name of PATTERN_CATEGORIES ) {
-				const category = categories.find( ( category ) => category.name === name );
-				if ( category ) {
-					result.push( category );
-				}
-			}
-
-			return result;
+			return wpcom.req
+				.get( `/ptk/categories/${ locale }` )
+				.then( ( categories: CategorySnakeCase[] ) => {
+					return categories.map(
+						( { regular_cattern_count, page_pattern_count, ...restCategory } ) => ( {
+							...restCategory,
+							pagePatternCount: page_pattern_count,
+							regularPatternCount: regular_cattern_count,
+						} )
+					);
+				} );
 		},
 		staleTime: Infinity,
 		...queryOptions,
-		enabled: !! siteId,
 	};
 }
 
 export function usePatternCategories(
 	locale: string,
-	siteId: undefined | number,
 	queryOptions: Omit< UseQueryOptions< Category[] >, 'queryKey' > = {}
 ) {
-	return useQuery< Category[] >( getPatternCategoriesQueryOptions( locale, siteId, queryOptions ) );
+	return useQuery< Category[] >( getPatternCategoriesQueryOptions( locale, queryOptions ) );
 }
diff --git a/client/my-sites/patterns/hooks/use-patterns.ts b/client/my-sites/patterns/hooks/use-patterns.ts
index 9b172f586c02b9..4ea3fc64caf176 100644
--- a/client/my-sites/patterns/hooks/use-patterns.ts
+++ b/client/my-sites/patterns/hooks/use-patterns.ts
@@ -8,7 +8,7 @@ export function getPatternsQueryOptions(
 	queryOptions: Omit< UseQueryOptions< Pattern[] >, 'queryKey' > = {}
 ) {
 	return {
-		queryKey: [ 'patterns', 'library', locale, category ],
+		queryKey: [ 'pattern-library', 'patterns', locale, category ],
 		queryFn: () => {
 			return wpcom.req.get( `/ptk/patterns/${ locale }`, {
 				categories: category,
diff --git a/client/my-sites/patterns/index.node.tsx b/client/my-sites/patterns/index.node.tsx
index 6625d64d31cf77..5d6ca150f1e142 100644
--- a/client/my-sites/patterns/index.node.tsx
+++ b/client/my-sites/patterns/index.node.tsx
@@ -2,13 +2,12 @@ import { getLanguageRouteParam } from '@automattic/i18n-utils';
 import { makeLayout, ssrSetupLocale } from 'calypso/controller';
 import { setHrefLangLinks, setLocalizedCanonicalUrl } from 'calypso/controller/localized-links';
 import { PatternGalleryServer } from 'calypso/my-sites/patterns/components/pattern-gallery/server';
-import { RENDERER_SITE_ID, getPatternCategorySlugs } from 'calypso/my-sites/patterns/controller';
 import { PatternsHomePage } from 'calypso/my-sites/patterns/home';
 import { getPatternCategoriesQueryOptions } from 'calypso/my-sites/patterns/hooks/use-pattern-categories';
 import { getPatternsQueryOptions } from 'calypso/my-sites/patterns/hooks/use-patterns';
 import { serverRouter } from 'calypso/server/isomorphic-routing';
 import { getCurrentUserLocale } from 'calypso/state/current-user/selectors';
-import type { RouterContext, RouterNext, Category, Pattern } from 'calypso/my-sites/patterns/types';
+import type { RouterContext, RouterNext, Pattern } from 'calypso/my-sites/patterns/types';
 
 function renderPatterns( context: RouterContext, next: RouterNext ) {
 	context.primary = (
@@ -22,7 +21,7 @@ function renderPatterns( context: RouterContext, next: RouterNext ) {
 	next();
 }
 
-function fetchPatterns( context: RouterContext, next: RouterNext ) {
+function fetchCategoriesAndPatterns( context: RouterContext, next: RouterNext ) {
 	const { cachedMarkup, queryClient, lang, params, store } = context;
 
 	if ( cachedMarkup ) {
@@ -32,19 +31,31 @@ function fetchPatterns( context: RouterContext, next: RouterNext ) {
 
 	const locale = getCurrentUserLocale( store.getState() ) || lang || 'en';
 
-	const categoryPromise = queryClient.fetchQuery< Category[] >(
-		getPatternCategoriesQueryOptions( locale, RENDERER_SITE_ID, {
-			staleTime: 10 * 60 * 1000,
-		} )
-	);
+	// Fetches the list of categories first, then fetches patterns if a specific category was requested
+	queryClient
+		.fetchQuery(
+			getPatternCategoriesQueryOptions( locale, {
+				staleTime: 10 * 60 * 1000,
+			} )
+		)
+		.then( ( categories ) => {
+			if ( ! params.category ) {
+				return;
+			}
 
-	const patternPromise = params.category
-		? queryClient.fetchQuery< Pattern[] >(
-				getPatternsQueryOptions( locale, params.category, { staleTime: 10 * 60 * 1000 } )
-		  )
-		: Promise.resolve();
+			const categoryNames = categories.map( ( category ) => category.name );
 
-	Promise.all( [ categoryPromise, patternPromise ] )
+			if ( ! categoryNames.includes( params.category ) ) {
+				throw {
+					status: 404,
+					message: 'Category Not Found',
+				};
+			}
+
+			return queryClient.fetchQuery< Pattern[] >(
+				getPatternsQueryOptions( locale, params.category, { staleTime: 10 * 60 * 1000 } )
+			);
+		} )
 		.then( () => {
 			next();
 		} )
@@ -55,17 +66,13 @@ function fetchPatterns( context: RouterContext, next: RouterNext ) {
 
 export default function ( router: ReturnType< typeof serverRouter > ) {
 	const langParam = getLanguageRouteParam();
-	const categorySlugs = getPatternCategorySlugs();
 
 	router(
-		[
-			`/${ langParam }/patterns/:category(${ categorySlugs })?`,
-			`/patterns/:category(${ categorySlugs })?`,
-		],
+		[ `/${ langParam }/patterns/:category?`, `/patterns/:category?` ],
 		ssrSetupLocale,
 		setHrefLangLinks,
 		setLocalizedCanonicalUrl,
-		fetchPatterns,
+		fetchCategoriesAndPatterns,
 		renderPatterns,
 		makeLayout
 	);
diff --git a/client/my-sites/patterns/index.web.tsx b/client/my-sites/patterns/index.web.tsx
index 43a32a0cfbded1..3335d90fda5bc0 100644
--- a/client/my-sites/patterns/index.web.tsx
+++ b/client/my-sites/patterns/index.web.tsx
@@ -4,33 +4,59 @@ import {
 	makeLayout,
 	redirectWithoutLocaleParamInFrontIfLoggedIn,
 	render as clientRender,
+	notFound,
 } from 'calypso/controller/index.web';
 import { PatternGalleryClient } from 'calypso/my-sites/patterns/components/pattern-gallery/client';
-import { getPatternCategorySlugs } from 'calypso/my-sites/patterns/controller';
 import { PatternsHomePage } from 'calypso/my-sites/patterns/home';
+import { getCurrentUserLocale } from 'calypso/state/current-user/selectors';
+import { getPatternCategoriesQueryOptions } from './hooks/use-pattern-categories';
 import type { RouterContext, RouterNext } from 'calypso/my-sites/patterns/types';
 
 function renderPatterns( context: RouterContext, next: RouterNext ) {
-	context.primary = (
-		<PatternsHomePage
-			category={ context.params.category }
-			isGridView={ !! context.query.grid }
-			patternGallery={ PatternGalleryClient }
-		/>
-	);
+	if ( ! context.primary ) {
+		context.primary = (
+			<PatternsHomePage
+				category={ context.params.category }
+				isGridView={ !! context.query.grid }
+				patternGallery={ PatternGalleryClient }
+			/>
+		);
+	}
 
 	next();
 }
 
+function checkCategorySlug( context: RouterContext, next: RouterNext ) {
+	const { queryClient, lang, params, store } = context;
+	const locale = getCurrentUserLocale( store.getState() ) || lang || 'en';
+
+	queryClient
+		.fetchQuery( getPatternCategoriesQueryOptions( locale ) )
+		.then( ( categories ) => {
+			if ( params.category ) {
+				const categoryNames = categories.map( ( category ) => category.name );
+
+				if ( ! categoryNames.includes( params.category ) ) {
+					notFound( context, next );
+					return;
+				}
+			}
+
+			next();
+		} )
+		.catch( ( error ) => {
+			next( error );
+		} );
+}
+
 export default function ( router: typeof clientRouter ) {
 	const langParam = getLanguageRouteParam();
-	const categorySlugs = getPatternCategorySlugs();
-	const middleware = [ renderPatterns, makeLayout, clientRender ];
+	const middleware = [ checkCategorySlug, renderPatterns, makeLayout, clientRender ];
 
 	router(
-		`/${ langParam }/patterns/:category(${ categorySlugs })?`,
+		`/${ langParam }/patterns/:category?`,
 		redirectWithoutLocaleParamInFrontIfLoggedIn,
 		...middleware
 	);
-	router( `/patterns/:category(${ categorySlugs })?`, ...middleware );
+	router( `/patterns/:category?`, ...middleware );
 }
diff --git a/client/my-sites/patterns/types.ts b/client/my-sites/patterns/types.ts
index 959ac9f27dc6ba..a990df62107ae3 100644
--- a/client/my-sites/patterns/types.ts
+++ b/client/my-sites/patterns/types.ts
@@ -1,9 +1,6 @@
 import type { Context } from '@automattic/calypso-router';
 import type { QueryClient } from '@tanstack/react-query';
-import type {
-	Category,
-	Pattern,
-} from 'calypso/landing/stepper/declarative-flow/internals/steps-repository/pattern-assembler/types';
+import type { Pattern } from 'calypso/landing/stepper/declarative-flow/internals/steps-repository/pattern-assembler/types';
 
 export type RouterNext = ( error?: Error ) => void;
 
@@ -12,7 +9,23 @@ export type RouterContext = Context & {
 	queryClient: QueryClient;
 };
 
-export type { Category, Pattern };
+export type { Pattern };
+
+type CategoryBase = {
+	name: string;
+	label: string;
+	description: string;
+};
+
+export type CategorySnakeCase = CategoryBase & {
+	page_pattern_count: number;
+	regular_cattern_count: number;
+};
+
+export type Category = CategoryBase & {
+	pagePatternCount: number;
+	regularPatternCount: number;
+};
 
 export type PatternGalleryProps = {
 	isGridView?: boolean;