diff --git a/packages/app-next-example-plugin/api-report.md b/packages/app-next-example-plugin/api-report.md
index 06d325b844..3f8b821559 100644
--- a/packages/app-next-example-plugin/api-report.md
+++ b/packages/app-next-example-plugin/api-report.md
@@ -40,6 +40,11 @@ const examplePlugin: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
   }
 >;
diff --git a/packages/frontend-plugin-api/api-report.md b/packages/frontend-plugin-api/api-report.md
index fc62582af0..1b202098cb 100644
--- a/packages/frontend-plugin-api/api-report.md
+++ b/packages/frontend-plugin-api/api-report.md
@@ -453,6 +453,7 @@ export function createComponentExtension<TProps extends {}>(options: {
       }
     >;
   };
+  params: never;
   kind: 'component';
   namespace: undefined;
   name: string;
@@ -520,6 +521,7 @@ export function createExtension<
       >;
   output: UOutput;
   inputs: TInputs;
+  params: never;
   kind: string | undefined extends TKind ? undefined : TKind;
   namespace: string | undefined extends TNamespace ? undefined : TNamespace;
   name: string | undefined extends TName ? undefined : TName;
@@ -569,6 +571,7 @@ export function createExtension<
       >;
   output: UOutput;
   inputs: TInputs;
+  params: never;
   kind: string | undefined extends TKind ? undefined : TKind;
   namespace: string | undefined extends TNamespace ? undefined : TNamespace;
   name: string | undefined extends TName ? undefined : TName;
@@ -983,6 +986,7 @@ export interface ExtensionBlueprint<
     configInput: T['configInput'];
     output: T['output'];
     inputs: T['inputs'];
+    params: T['params'];
   }>;
   // @deprecated (undocumented)
   make<
@@ -1093,6 +1097,7 @@ export interface ExtensionBlueprint<
     kind: T['kind'];
     namespace: undefined;
     name: string | undefined extends TNewName ? T['name'] : TNewName;
+    params: T['params'];
   }>;
   // @deprecated (undocumented)
   makeWithOverrides<
@@ -1306,45 +1311,60 @@ export type ExtensionDefinition<
       >;
     },
   >(
-    args: {
-      attachTo?: {
-        id: string;
-        input: string;
-      };
-      disabled?: boolean;
-      inputs?: TExtraInputs & {
-        [KName in keyof T['inputs']]?: `Error: Input '${KName &
-          string}' is already defined in parent definition`;
-      };
-      output?: Array<UNewOutput>;
-      config?: {
-        schema: TExtensionConfigSchema & {
-          [KName in keyof T['config']]?: `Error: Config key '${KName &
-            string}' is already defined in parent schema`;
+    args: Expand<
+      {
+        attachTo?: {
+          id: string;
+          input: string;
         };
-      };
-      factory?(
-        originalFactory: (context?: {
-          config?: T['config'];
-          inputs?: ResolveInputValueOverrides<NonNullable<T['inputs']>>;
-        }) => ExtensionDataContainer<NonNullable<T['output']>>,
-        context: {
-          node: AppNode;
-          apis: ApiHolder;
-          config: T['config'] & {
-            [key in keyof TExtensionConfigSchema]: z.infer<
-              ReturnType<TExtensionConfigSchema[key]>
-            >;
+        disabled?: boolean;
+        inputs?: TExtraInputs & {
+          [KName in keyof T['inputs']]?: `Error: Input '${KName &
+            string}' is already defined in parent definition`;
+        };
+        output?: Array<UNewOutput>;
+        config?: {
+          schema: TExtensionConfigSchema & {
+            [KName in keyof T['config']]?: `Error: Config key '${KName &
+              string}' is already defined in parent schema`;
           };
-          inputs: Expand<ResolvedExtensionInputs<T['inputs'] & TExtraInputs>>;
-        },
-      ): Iterable<UFactoryOutput>;
-    } & VerifyExtensionFactoryOutput<
-      AnyExtensionDataRef extends UNewOutput
-        ? NonNullable<T['output']>
-        : UNewOutput,
-      UFactoryOutput
-    >,
+        };
+        factory?(
+          originalFactory: (
+            context?: Expand<
+              {
+                config?: T['config'];
+                inputs?: ResolveInputValueOverrides<NonNullable<T['inputs']>>;
+              } & ([T['params']] extends [never]
+                ? {}
+                : {
+                    params?: Partial<T['params']>;
+                  })
+            >,
+          ) => ExtensionDataContainer<NonNullable<T['output']>>,
+          context: {
+            node: AppNode;
+            apis: ApiHolder;
+            config: T['config'] & {
+              [key in keyof TExtensionConfigSchema]: z.infer<
+                ReturnType<TExtensionConfigSchema[key]>
+              >;
+            };
+            inputs: Expand<ResolvedExtensionInputs<T['inputs'] & TExtraInputs>>;
+          },
+        ): Iterable<UFactoryOutput>;
+      } & ([T['params']] extends [never]
+        ? {}
+        : {
+            params?: Partial<T['params']>;
+          })
+    > &
+      VerifyExtensionFactoryOutput<
+        AnyExtensionDataRef extends UNewOutput
+          ? NonNullable<T['output']>
+          : UNewOutput,
+        UFactoryOutput
+      >,
   ): ExtensionDefinition<{
     kind: T['kind'];
     namespace: T['namespace'];
@@ -1388,6 +1408,7 @@ export type ExtensionDefinitionParameters = {
       }
     >;
   };
+  params?: object;
 };
 
 // @public (undocumented)
diff --git a/plugins/api-docs/api-report-alpha.md b/plugins/api-docs/api-report-alpha.md
index bb2da7bc0b..9800406be3 100644
--- a/plugins/api-docs/api-report-alpha.md
+++ b/plugins/api-docs/api-report-alpha.md
@@ -41,6 +41,11 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
     'api:api-docs/config': ExtensionDefinition<{
       kind: 'api';
@@ -54,6 +59,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'page:api-docs': ExtensionDefinition<{
       config: {
@@ -92,6 +100,11 @@ const _default: FrontendPlugin<
       kind: 'page';
       namespace: undefined;
       name: undefined;
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'entity-card:api-docs/has-apis': ExtensionDefinition<{
       kind: 'entity-card';
@@ -124,6 +137,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:api-docs/definition': ExtensionDefinition<{
       kind: 'entity-card';
@@ -156,6 +173,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:api-docs/consumed-apis': ExtensionDefinition<{
       kind: 'entity-card';
@@ -188,6 +209,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:api-docs/provided-apis': ExtensionDefinition<{
       kind: 'entity-card';
@@ -220,6 +245,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:api-docs/consuming-components': ExtensionDefinition<{
       kind: 'entity-card';
@@ -252,6 +281,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:api-docs/providing-components': ExtensionDefinition<{
       kind: 'entity-card';
@@ -284,6 +317,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-content:api-docs/definition': ExtensionDefinition<{
       kind: 'entity-content';
@@ -333,6 +370,13 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        defaultPath: string;
+        defaultTitle: string;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-content:api-docs/apis': ExtensionDefinition<{
       kind: 'entity-content';
@@ -382,6 +426,13 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        defaultPath: string;
+        defaultTitle: string;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
   }
 >;
diff --git a/plugins/app-visualizer/api-report.md b/plugins/app-visualizer/api-report.md
index e542674845..3f3813f5ee 100644
--- a/plugins/app-visualizer/api-report.md
+++ b/plugins/app-visualizer/api-report.md
@@ -41,6 +41,11 @@ const visualizerPlugin: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'nav-item:app-visualizer': ExtensionDefinition<{
       kind: 'nav-item';
@@ -58,6 +63,11 @@ const visualizerPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
   }
 >;
diff --git a/plugins/app/api-report.md b/plugins/app/api-report.md
index 6f2e6e0463..e6ef06eebf 100644
--- a/plugins/app/api-report.md
+++ b/plugins/app/api-report.md
@@ -46,6 +46,7 @@ const appPlugin: FrontendPlugin<
           }
         >;
       };
+      params: never;
       kind: undefined;
       namespace: undefined;
       name: undefined;
@@ -62,6 +63,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'app/layout': ExtensionDefinition<{
       config: {};
@@ -87,6 +91,7 @@ const appPlugin: FrontendPlugin<
           }
         >;
       };
+      params: never;
       kind: undefined;
       namespace: undefined;
       name: 'layout';
@@ -130,6 +135,7 @@ const appPlugin: FrontendPlugin<
           }
         >;
       };
+      params: never;
       kind: undefined;
       namespace: undefined;
       name: 'nav';
@@ -195,6 +201,7 @@ const appPlugin: FrontendPlugin<
           }
         >;
       };
+      params: never;
       kind: undefined;
       namespace: undefined;
       name: 'root';
@@ -224,6 +231,7 @@ const appPlugin: FrontendPlugin<
           }
         >;
       };
+      params: never;
       kind: undefined;
       namespace: undefined;
       name: 'routes';
@@ -248,6 +256,9 @@ const appPlugin: FrontendPlugin<
       kind: 'api';
       namespace: undefined;
       name: 'app-theme';
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'theme:app/light': ExtensionDefinition<{
       kind: 'theme';
@@ -257,6 +268,9 @@ const appPlugin: FrontendPlugin<
       configInput: {};
       output: ConfigurableExtensionDataRef<AppTheme, 'core.theme.theme', {}>;
       inputs: {};
+      params: {
+        theme: AppTheme;
+      };
     }>;
     'theme:app/dark': ExtensionDefinition<{
       kind: 'theme';
@@ -266,6 +280,9 @@ const appPlugin: FrontendPlugin<
       configInput: {};
       output: ConfigurableExtensionDataRef<AppTheme, 'core.theme.theme', {}>;
       inputs: {};
+      params: {
+        theme: AppTheme;
+      };
     }>;
     'api:app/components': ExtensionDefinition<{
       config: {};
@@ -294,6 +311,9 @@ const appPlugin: FrontendPlugin<
       kind: 'api';
       namespace: undefined;
       name: 'components';
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/icons': ExtensionDefinition<{
       config: {};
@@ -321,6 +341,9 @@ const appPlugin: FrontendPlugin<
       kind: 'api';
       namespace: undefined;
       name: 'icons';
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/feature-flags': ExtensionDefinition<{
       kind: 'api';
@@ -334,6 +357,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/translations': ExtensionDefinition<{
       config: {};
@@ -366,6 +392,9 @@ const appPlugin: FrontendPlugin<
       kind: 'api';
       namespace: undefined;
       name: 'translations';
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'app-root-element:app/oauth-request-dialog': ExtensionDefinition<{
       kind: 'app-root-element';
@@ -379,6 +408,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        element: JSX.Element | (() => JSX.Element);
+      };
     }>;
     'app-root-element:app/alert-display': ExtensionDefinition<{
       config: {
@@ -414,6 +446,9 @@ const appPlugin: FrontendPlugin<
       kind: 'app-root-element';
       namespace: undefined;
       name: 'alert-display';
+      params: {
+        element: JSX.Element | (() => JSX.Element);
+      };
     }>;
     'api:app/discovery': ExtensionDefinition<{
       kind: 'api';
@@ -427,6 +462,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/alert': ExtensionDefinition<{
       kind: 'api';
@@ -440,6 +478,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/analytics': ExtensionDefinition<{
       kind: 'api';
@@ -453,6 +494,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/error': ExtensionDefinition<{
       kind: 'api';
@@ -466,6 +510,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/storage': ExtensionDefinition<{
       kind: 'api';
@@ -479,6 +526,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/fetch': ExtensionDefinition<{
       kind: 'api';
@@ -492,6 +542,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/oauth-request': ExtensionDefinition<{
       kind: 'api';
@@ -505,6 +558,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/google-auth': ExtensionDefinition<{
       kind: 'api';
@@ -518,6 +574,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/microsoft-auth': ExtensionDefinition<{
       kind: 'api';
@@ -531,6 +590,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/github-auth': ExtensionDefinition<{
       kind: 'api';
@@ -544,6 +606,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/okta-auth': ExtensionDefinition<{
       kind: 'api';
@@ -557,6 +622,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/gitlab-auth': ExtensionDefinition<{
       kind: 'api';
@@ -570,6 +638,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/onelogin-auth': ExtensionDefinition<{
       kind: 'api';
@@ -583,6 +654,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/bitbucket-auth': ExtensionDefinition<{
       kind: 'api';
@@ -596,6 +670,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/bitbucket-server-auth': ExtensionDefinition<{
       kind: 'api';
@@ -609,6 +686,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/atlassian-auth': ExtensionDefinition<{
       kind: 'api';
@@ -622,6 +702,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/vmware-cloud-auth': ExtensionDefinition<{
       kind: 'api';
@@ -635,6 +718,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:app/permission': ExtensionDefinition<{
       kind: 'api';
@@ -648,6 +734,9 @@ const appPlugin: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
   }
 >;
diff --git a/plugins/catalog-graph/api-report-alpha.md b/plugins/catalog-graph/api-report-alpha.md
index 65f8af3764..67b1478597 100644
--- a/plugins/catalog-graph/api-report-alpha.md
+++ b/plugins/catalog-graph/api-report-alpha.md
@@ -91,6 +91,10 @@ const _default: FrontendPlugin<
       kind: 'entity-card';
       namespace: undefined;
       name: 'relations';
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'page:catalog-graph': ExtensionDefinition<{
       config: {
@@ -153,6 +157,11 @@ const _default: FrontendPlugin<
       kind: 'page';
       namespace: undefined;
       name: undefined;
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
   }
 >;
diff --git a/plugins/catalog-import/api-report-alpha.md b/plugins/catalog-import/api-report-alpha.md
index 3eed9ce3e4..6c3e80a477 100644
--- a/plugins/catalog-import/api-report-alpha.md
+++ b/plugins/catalog-import/api-report-alpha.md
@@ -30,6 +30,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'page:catalog-import': ExtensionDefinition<{
       kind: 'page';
@@ -56,6 +59,11 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
   }
 >;
diff --git a/plugins/catalog/api-report-alpha.md b/plugins/catalog/api-report-alpha.md
index 62e631dd4a..c6b4a02871 100644
--- a/plugins/catalog/api-report-alpha.md
+++ b/plugins/catalog/api-report-alpha.md
@@ -20,6 +20,7 @@ import { JSX as JSX_2 } from 'react';
 import { RouteRef } from '@backstage/frontend-plugin-api';
 import { SearchResultItemExtensionComponent } from '@backstage/plugin-search-react/alpha';
 import { SearchResultItemExtensionPredicate } from '@backstage/plugin-search-react/alpha';
+import { SearchResultListItemBlueprintParams } from '@backstage/plugin-search-react/alpha';
 import { TranslationRef } from '@backstage/core-plugin-api/alpha';
 
 // @alpha
@@ -158,6 +159,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'nav-item:catalog': ExtensionDefinition<{
       kind: 'nav-item';
@@ -175,6 +179,11 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
     'api:catalog/starred-entities': ExtensionDefinition<{
       kind: 'api';
@@ -188,6 +197,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:catalog/entity-presentation': ExtensionDefinition<{
       kind: 'api';
@@ -201,6 +213,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'entity-card:catalog/about': ExtensionDefinition<{
       kind: 'entity-card';
@@ -229,6 +244,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/links': ExtensionDefinition<{
       kind: 'entity-card';
@@ -257,6 +276,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/labels': ExtensionDefinition<{
       kind: 'entity-card';
@@ -285,6 +308,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/depends-on-components': ExtensionDefinition<{
       kind: 'entity-card';
@@ -313,6 +340,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/depends-on-resources': ExtensionDefinition<{
       kind: 'entity-card';
@@ -341,6 +372,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/has-components': ExtensionDefinition<{
       kind: 'entity-card';
@@ -369,6 +404,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/has-resources': ExtensionDefinition<{
       kind: 'entity-card';
@@ -397,6 +436,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/has-subcomponents': ExtensionDefinition<{
       kind: 'entity-card';
@@ -425,6 +468,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/has-subdomains': ExtensionDefinition<{
       kind: 'entity-card';
@@ -453,6 +500,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:catalog/has-systems': ExtensionDefinition<{
       kind: 'entity-card';
@@ -481,6 +532,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-content:catalog/overview': ExtensionDefinition<{
       config: {
@@ -548,6 +603,13 @@ const _default: FrontendPlugin<
       kind: 'entity-content';
       namespace: undefined;
       name: 'overview';
+      params: {
+        loader: () => Promise<JSX.Element>;
+        defaultPath: string;
+        defaultTitle: string;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'catalog-filter:catalog/tag': ExtensionDefinition<{
       kind: 'catalog-filter';
@@ -561,6 +623,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'catalog-filter:catalog/kind': ExtensionDefinition<{
       config: {
@@ -586,6 +651,9 @@ const _default: FrontendPlugin<
       kind: 'catalog-filter';
       namespace: undefined;
       name: 'kind';
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'catalog-filter:catalog/type': ExtensionDefinition<{
       kind: 'catalog-filter';
@@ -599,6 +667,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'catalog-filter:catalog/mode': ExtensionDefinition<{
       config: {
@@ -624,6 +695,9 @@ const _default: FrontendPlugin<
       kind: 'catalog-filter';
       namespace: undefined;
       name: 'mode';
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'catalog-filter:catalog/namespace': ExtensionDefinition<{
       kind: 'catalog-filter';
@@ -637,6 +711,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'catalog-filter:catalog/lifecycle': ExtensionDefinition<{
       kind: 'catalog-filter';
@@ -650,6 +727,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'catalog-filter:catalog/processing-status': ExtensionDefinition<{
       kind: 'catalog-filter';
@@ -663,6 +743,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'catalog-filter:catalog/list': ExtensionDefinition<{
       config: {
@@ -688,6 +771,9 @@ const _default: FrontendPlugin<
       kind: 'catalog-filter';
       namespace: undefined;
       name: 'list';
+      params: {
+        loader: () => Promise<JSX.Element>;
+      };
     }>;
     'page:catalog': ExtensionDefinition<{
       config: {
@@ -718,6 +804,11 @@ const _default: FrontendPlugin<
       kind: 'page';
       namespace: undefined;
       name: undefined;
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'page:catalog/entity': ExtensionDefinition<{
       config: {
@@ -775,6 +866,11 @@ const _default: FrontendPlugin<
       kind: 'page';
       namespace: undefined;
       name: 'entity';
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'search-result-list-item:catalog': ExtensionDefinition<{
       kind: 'search-result-list-item';
@@ -795,6 +891,7 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: SearchResultListItemBlueprintParams;
     }>;
   }
 >;
diff --git a/plugins/devtools/api-report-alpha.md b/plugins/devtools/api-report-alpha.md
index 7fb16734f1..9a9bbbb463 100644
--- a/plugins/devtools/api-report-alpha.md
+++ b/plugins/devtools/api-report-alpha.md
@@ -31,6 +31,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'page:devtools': ExtensionDefinition<{
       kind: 'page';
@@ -57,6 +60,11 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'nav-item:devtools': ExtensionDefinition<{
       kind: 'nav-item';
@@ -74,6 +82,11 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
   }
 >;
diff --git a/plugins/home/api-report-alpha.md b/plugins/home/api-report-alpha.md
index 7b4b157eb2..71aa85d0f5 100644
--- a/plugins/home/api-report-alpha.md
+++ b/plugins/home/api-report-alpha.md
@@ -62,6 +62,11 @@ const _default: FrontendPlugin<
       kind: 'page';
       namespace: undefined;
       name: undefined;
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
   }
 >;
diff --git a/plugins/kubernetes/api-report-alpha.md b/plugins/kubernetes/api-report-alpha.md
index 852a5c6c1a..4ffdc36a96 100644
--- a/plugins/kubernetes/api-report-alpha.md
+++ b/plugins/kubernetes/api-report-alpha.md
@@ -33,6 +33,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'page:kubernetes': ExtensionDefinition<{
       kind: 'page';
@@ -55,6 +58,11 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'entity-content:kubernetes/kubernetes': ExtensionDefinition<{
       kind: 'entity-content';
@@ -100,6 +108,13 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        defaultPath: string;
+        defaultTitle: string;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'api:kubernetes/proxy': ExtensionDefinition<{
       kind: 'api';
@@ -113,6 +128,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:kubernetes/auth-providers': ExtensionDefinition<{
       kind: 'api';
@@ -126,6 +144,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'api:kubernetes/cluster-link-formatter': ExtensionDefinition<{
       kind: 'api';
@@ -139,6 +160,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
   }
 >;
diff --git a/plugins/org/api-report-alpha.md b/plugins/org/api-report-alpha.md
index a8c6bd70ec..5a88d229ce 100644
--- a/plugins/org/api-report-alpha.md
+++ b/plugins/org/api-report-alpha.md
@@ -48,6 +48,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:org/members-list': ExtensionDefinition<{
       kind: 'entity-card';
@@ -80,6 +84,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:org/ownership': ExtensionDefinition<{
       kind: 'entity-card';
@@ -112,6 +120,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'entity-card:org/user-profile': ExtensionDefinition<{
       kind: 'entity-card';
@@ -144,6 +156,10 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        loader: () => Promise<JSX.Element>;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
   }
 >;
diff --git a/plugins/scaffolder/api-report-alpha.md b/plugins/scaffolder/api-report-alpha.md
index cd4cd7ce3c..47c041e0d8 100644
--- a/plugins/scaffolder/api-report-alpha.md
+++ b/plugins/scaffolder/api-report-alpha.md
@@ -56,6 +56,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'page:scaffolder': ExtensionDefinition<{
       kind: 'page';
@@ -82,6 +85,11 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'nav-item:scaffolder': ExtensionDefinition<{
       kind: 'nav-item';
@@ -99,6 +107,11 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
   }
 >;
diff --git a/plugins/search/api-report-alpha.md b/plugins/search/api-report-alpha.md
index fe06873bd4..ed54b23a2f 100644
--- a/plugins/search/api-report-alpha.md
+++ b/plugins/search/api-report-alpha.md
@@ -34,6 +34,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'nav-item:search': ExtensionDefinition<{
       kind: 'nav-item';
@@ -51,6 +54,11 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
     'page:search': ExtensionDefinition<{
       config: {
@@ -96,6 +104,11 @@ const _default: FrontendPlugin<
       kind: 'page';
       namespace: undefined;
       name: undefined;
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
   }
 >;
@@ -110,6 +123,9 @@ export const searchApi: ExtensionDefinition<{
   configInput: {};
   output: ConfigurableExtensionDataRef<AnyApiFactory, 'core.api.factory', {}>;
   inputs: {};
+  params: {
+    factory: AnyApiFactory;
+  };
 }>;
 
 // @alpha (undocumented)
@@ -129,6 +145,11 @@ export const searchNavItem: ExtensionDefinition<{
     {}
   >;
   inputs: {};
+  params: {
+    title: string;
+    icon: IconComponent;
+    routeRef: RouteRef<undefined>;
+  };
 }>;
 
 // @alpha (undocumented)
@@ -172,6 +193,11 @@ export const searchPage: ExtensionDefinition<{
   kind: 'page';
   namespace: undefined;
   name: undefined;
+  params: {
+    defaultPath: string;
+    loader: () => Promise<JSX.Element>;
+    routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+  };
 }>;
 
 // (No @packageDocumentation comment for this package)
diff --git a/plugins/techdocs/api-report-alpha.md b/plugins/techdocs/api-report-alpha.md
index dfe5dc2cc2..6be48f4331 100644
--- a/plugins/techdocs/api-report-alpha.md
+++ b/plugins/techdocs/api-report-alpha.md
@@ -16,6 +16,7 @@ import { default as React_2 } from 'react';
 import { RouteRef } from '@backstage/frontend-plugin-api';
 import { SearchResultItemExtensionComponent } from '@backstage/plugin-search-react/alpha';
 import { SearchResultItemExtensionPredicate } from '@backstage/plugin-search-react/alpha';
+import { SearchResultListItemBlueprintParams } from '@backstage/plugin-search-react/alpha';
 
 // @alpha (undocumented)
 const _default: FrontendPlugin<
@@ -42,6 +43,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'page:techdocs': ExtensionDefinition<{
       kind: 'page';
@@ -68,6 +72,11 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'nav-item:techdocs': ExtensionDefinition<{
       kind: 'nav-item';
@@ -85,6 +94,11 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
     'api:techdocs/storage': ExtensionDefinition<{
       kind: 'api';
@@ -98,6 +112,9 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        factory: AnyApiFactory;
+      };
     }>;
     'search-result-list-item:techdocs': ExtensionDefinition<{
       config: {
@@ -136,6 +153,7 @@ const _default: FrontendPlugin<
       kind: 'search-result-list-item';
       namespace: undefined;
       name: undefined;
+      params: SearchResultListItemBlueprintParams;
     }>;
     'page:techdocs/reader': ExtensionDefinition<{
       kind: 'page';
@@ -162,6 +180,11 @@ const _default: FrontendPlugin<
             }
           >;
       inputs: {};
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
     'entity-content:techdocs': ExtensionDefinition<{
       config: {
@@ -223,6 +246,13 @@ const _default: FrontendPlugin<
       kind: 'entity-content';
       namespace: undefined;
       name: undefined;
+      params: {
+        loader: () => Promise<JSX.Element>;
+        defaultPath: string;
+        defaultTitle: string;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+        filter?: string | ((entity: Entity) => boolean) | undefined;
+      };
     }>;
     'empty-state:techdocs/entity-content': ExtensionDefinition<{
       config: {};
@@ -243,6 +273,7 @@ const _default: FrontendPlugin<
           }
         >;
       };
+      params: never;
       kind: 'empty-state';
       namespace: undefined;
       name: 'entity-content';
@@ -289,6 +320,7 @@ export const techDocsSearchResultListItemExtension: ExtensionDefinition<{
   kind: 'search-result-list-item';
   namespace: undefined;
   name: undefined;
+  params: SearchResultListItemBlueprintParams;
 }>;
 
 // (No @packageDocumentation comment for this package)
diff --git a/plugins/user-settings/api-report-alpha.md b/plugins/user-settings/api-report-alpha.md
index 199dbba582..8dcba01f68 100644
--- a/plugins/user-settings/api-report-alpha.md
+++ b/plugins/user-settings/api-report-alpha.md
@@ -36,6 +36,11 @@ const _default: FrontendPlugin<
         {}
       >;
       inputs: {};
+      params: {
+        title: string;
+        icon: IconComponent;
+        routeRef: RouteRef<undefined>;
+      };
     }>;
     'page:user-settings': ExtensionDefinition<{
       config: {
@@ -74,6 +79,11 @@ const _default: FrontendPlugin<
       kind: 'page';
       namespace: undefined;
       name: undefined;
+      params: {
+        defaultPath: string;
+        loader: () => Promise<JSX.Element>;
+        routeRef?: RouteRef<AnyRouteRefParams> | undefined;
+      };
     }>;
   }
 >;
@@ -96,6 +106,11 @@ export const settingsNavItem: ExtensionDefinition<{
     {}
   >;
   inputs: {};
+  params: {
+    title: string;
+    icon: IconComponent;
+    routeRef: RouteRef<undefined>;
+  };
 }>;
 
 // @alpha (undocumented)