diff --git a/packages/backend-app-api/api-report.md b/packages/backend-app-api/api-report.md
index ef88d9a9d0..fa3f3bec2e 100644
--- a/packages/backend-app-api/api-report.md
+++ b/packages/backend-app-api/api-report.md
@@ -4,19 +4,21 @@
 
 ```ts
 import { BackendFeature } from '@backstage/backend-plugin-api';
-import { Config } from '@backstage/config';
+import { CacheService } from '@backstage/backend-plugin-api';
+import { ConfigService } from '@backstage/backend-plugin-api';
+import { DatabaseService } from '@backstage/backend-plugin-api';
 import { ExtensionPoint } from '@backstage/backend-plugin-api';
 import { HttpRouterService } from '@backstage/backend-plugin-api';
 import { LifecycleService } from '@backstage/backend-plugin-api';
 import { LoggerService } from '@backstage/backend-plugin-api';
 import { PermissionsService } from '@backstage/backend-plugin-api';
-import { PluginCacheManager } from '@backstage/backend-common';
-import { PluginDatabaseManager } from '@backstage/backend-common';
 import { PluginEndpointDiscovery } from '@backstage/backend-common';
-import { PluginTaskScheduler } from '@backstage/backend-tasks';
+import { RootLifecycleService } from '@backstage/backend-plugin-api';
+import { RootLoggerService } from '@backstage/backend-plugin-api';
+import { SchedulerService } from '@backstage/backend-plugin-api';
 import { ServiceFactory } from '@backstage/backend-plugin-api';
 import { ServiceRef } from '@backstage/backend-plugin-api';
-import { TokenManager } from '@backstage/backend-common';
+import { TokenManagerService } from '@backstage/backend-plugin-api';
 import { UrlReader } from '@backstage/backend-common';
 
 // @public (undocumented)
@@ -32,10 +34,12 @@ export interface Backend {
 // @public (undocumented)
 export const cacheFactory: (
   options?: undefined,
-) => ServiceFactory<PluginCacheManager>;
+) => ServiceFactory<CacheService>;
 
 // @public (undocumented)
-export const configFactory: (options?: undefined) => ServiceFactory<Config>;
+export const configFactory: (
+  options?: undefined,
+) => ServiceFactory<ConfigService>;
 
 // @public (undocumented)
 export function createSpecializedBackend(
@@ -51,7 +55,7 @@ export interface CreateSpecializedBackendOptions {
 // @public (undocumented)
 export const databaseFactory: (
   options?: undefined,
-) => ServiceFactory<PluginDatabaseManager>;
+) => ServiceFactory<DatabaseService>;
 
 // @public (undocumented)
 export const discoveryFactory: (
@@ -86,17 +90,17 @@ export const permissionsFactory: (
 // @public
 export const rootLifecycleFactory: (
   options?: undefined,
-) => ServiceFactory<LifecycleService>;
+) => ServiceFactory<RootLifecycleService>;
 
 // @public (undocumented)
 export const rootLoggerFactory: (
   options?: undefined,
-) => ServiceFactory<LoggerService>;
+) => ServiceFactory<RootLoggerService>;
 
 // @public (undocumented)
 export const schedulerFactory: (
   options?: undefined,
-) => ServiceFactory<PluginTaskScheduler>;
+) => ServiceFactory<SchedulerService>;
 
 // @public (undocumented)
 export type ServiceOrExtensionPoint<T = unknown> =
@@ -106,7 +110,7 @@ export type ServiceOrExtensionPoint<T = unknown> =
 // @public (undocumented)
 export const tokenManagerFactory: (
   options?: undefined,
-) => ServiceFactory<TokenManager>;
+) => ServiceFactory<TokenManagerService>;
 
 // @public (undocumented)
 export const urlReaderFactory: (
diff --git a/packages/backend-plugin-api/api-report.md b/packages/backend-plugin-api/api-report.md
index 7176fd2d19..9c6ffe6dd5 100644
--- a/packages/backend-plugin-api/api-report.md
+++ b/packages/backend-plugin-api/api-report.md
@@ -8,7 +8,6 @@
 import { Config } from '@backstage/config';
 import { Handler } from 'express';
 import { Logger } from 'winston';
-import { PermissionAuthorizer } from '@backstage/plugin-permission-common';
 import { PermissionEvaluator } from '@backstage/plugin-permission-common';
 import { PluginCacheManager } from '@backstage/backend-common';
 import { PluginDatabaseManager } from '@backstage/backend-common';
@@ -67,26 +66,26 @@ export interface BackendRegistrationPoints {
 }
 
 // @public (undocumented)
-export type CacheService = PluginCacheManager;
+export interface CacheService extends PluginCacheManager {}
 
 // @public (undocumented)
-export type ConfigService = Config;
+export interface ConfigService extends Config {}
 
 // @public
 export namespace coreServices {
-  const cache: ServiceRef<PluginCacheManager, 'plugin'>;
-  const config: ServiceRef<Config, 'root'>;
-  const database: ServiceRef<PluginDatabaseManager, 'plugin'>;
+  const cache: ServiceRef<CacheService, 'plugin'>;
+  const config: ServiceRef<ConfigService, 'root'>;
+  const database: ServiceRef<DatabaseService, 'plugin'>;
   const discovery: ServiceRef<DiscoveryService, 'plugin'>;
   const httpRouter: ServiceRef<HttpRouterService, 'plugin'>;
   const lifecycle: ServiceRef<LifecycleService, 'plugin'>;
   const logger: ServiceRef<LoggerService, 'plugin'>;
   const permissions: ServiceRef<PermissionsService, 'plugin'>;
   const pluginMetadata: ServiceRef<PluginMetadataService, 'plugin'>;
-  const rootLifecycle: ServiceRef<LifecycleService, 'root'>;
-  const rootLogger: ServiceRef<LoggerService, 'root'>;
-  const scheduler: ServiceRef<PluginTaskScheduler, 'plugin'>;
-  const tokenManager: ServiceRef<TokenManager, 'plugin'>;
+  const rootLifecycle: ServiceRef<RootLifecycleService, 'root'>;
+  const rootLogger: ServiceRef<RootLoggerService, 'root'>;
+  const scheduler: ServiceRef<SchedulerService, 'plugin'>;
+  const tokenManager: ServiceRef<TokenManagerService, 'plugin'>;
   const urlReader: ServiceRef<UrlReaderService, 'plugin'>;
 }
 
@@ -155,13 +154,13 @@ export function createServiceRef<T>(options: {
 }): ServiceRef<T, 'root'>;
 
 // @public (undocumented)
-export type DatabaseService = PluginDatabaseManager;
+export interface DatabaseService extends PluginDatabaseManager {}
 
 // @public
-export type DiscoveryService = {
+export interface DiscoveryService {
   getBaseUrl(pluginId: string): Promise<string>;
   getExternalBaseUrl(pluginId: string): Promise<string>;
-};
+}
 
 // @public
 export type ExtensionPoint<T> = {
@@ -214,7 +213,7 @@ export type LogMeta = {
 };
 
 // @public (undocumented)
-export type PermissionsService = PermissionEvaluator | PermissionAuthorizer;
+export interface PermissionsService extends PermissionEvaluator {}
 
 // @public (undocumented)
 export interface PluginMetadataService {
@@ -267,13 +266,13 @@ export type ReadUrlResponse = {
 };
 
 // @public (undocumented)
-export type RootLifecycleService = LifecycleService;
+export interface RootLifecycleService extends LifecycleService {}
 
 // @public (undocumented)
-export type RootLoggerService = LoggerService;
+export interface RootLoggerService extends LoggerService {}
 
 // @public (undocumented)
-export type SchedulerService = PluginTaskScheduler;
+export interface SchedulerService extends PluginTaskScheduler {}
 
 // @public
 export type SearchOptions = {
@@ -333,7 +332,7 @@ export type ServiceRef<
 };
 
 // @public (undocumented)
-export type TokenManagerService = TokenManager;
+export interface TokenManagerService extends TokenManager {}
 
 // @public (undocumented)
 export type TypesToServiceRef<T> = {
@@ -341,9 +340,9 @@ export type TypesToServiceRef<T> = {
 };
 
 // @public
-export type UrlReaderService = {
-  readUrl(url: string, options?: ReadUrlOptions): Promise<ReadUrlResponse>;
+export interface UrlReaderService {
   readTree(url: string, options?: ReadTreeOptions): Promise<ReadTreeResponse>;
+  readUrl(url: string, options?: ReadUrlOptions): Promise<ReadUrlResponse>;
   search(url: string, options?: SearchOptions): Promise<SearchResponse>;
-};
+}
 ```
diff --git a/packages/backend-plugin-api/src/services/definitions/CacheService.ts b/packages/backend-plugin-api/src/services/definitions/CacheService.ts
index 3311816410..79c930f435 100644
--- a/packages/backend-plugin-api/src/services/definitions/CacheService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/CacheService.ts
@@ -17,4 +17,4 @@
 import { PluginCacheManager } from '@backstage/backend-common';
 
 /** @public */
-export type CacheService = PluginCacheManager;
+export interface CacheService extends PluginCacheManager {}
diff --git a/packages/backend-plugin-api/src/services/definitions/ConfigService.ts b/packages/backend-plugin-api/src/services/definitions/ConfigService.ts
index 4b57e617fc..db9aa88dda 100644
--- a/packages/backend-plugin-api/src/services/definitions/ConfigService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/ConfigService.ts
@@ -19,4 +19,4 @@ import { Config } from '@backstage/config';
 /**
  * @public
  */
-export type ConfigService = Config;
+export interface ConfigService extends Config {}
diff --git a/packages/backend-plugin-api/src/services/definitions/DatabaseService.ts b/packages/backend-plugin-api/src/services/definitions/DatabaseService.ts
index afb3081a78..30f1f574f2 100644
--- a/packages/backend-plugin-api/src/services/definitions/DatabaseService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/DatabaseService.ts
@@ -17,4 +17,4 @@
 import { PluginDatabaseManager } from '@backstage/backend-common';
 
 /** @public */
-export type DatabaseService = PluginDatabaseManager;
+export interface DatabaseService extends PluginDatabaseManager {}
diff --git a/packages/backend-plugin-api/src/services/definitions/DiscoveryService.ts b/packages/backend-plugin-api/src/services/definitions/DiscoveryService.ts
index dec61ab56f..c3f0820c28 100644
--- a/packages/backend-plugin-api/src/services/definitions/DiscoveryService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/DiscoveryService.ts
@@ -28,7 +28,7 @@
  *
  * @public
  */
-export type DiscoveryService = {
+export interface DiscoveryService {
   /**
    * Returns the internal HTTP base URL for a given plugin, without a trailing slash.
    *
@@ -60,4 +60,4 @@ export type DiscoveryService = {
    * like `https://backstage.example.com/api/catalog`
    */
   getExternalBaseUrl(pluginId: string): Promise<string>;
-};
+}
diff --git a/packages/backend-plugin-api/src/services/definitions/PermissionsService.ts b/packages/backend-plugin-api/src/services/definitions/PermissionsService.ts
index 0a3c045ea7..5847f55ee6 100644
--- a/packages/backend-plugin-api/src/services/definitions/PermissionsService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/PermissionsService.ts
@@ -14,10 +14,7 @@
  * limitations under the License.
  */
 
-import {
-  PermissionAuthorizer,
-  PermissionEvaluator,
-} from '@backstage/plugin-permission-common';
+import { PermissionEvaluator } from '@backstage/plugin-permission-common';
 
 /** @public */
-export type PermissionsService = PermissionEvaluator | PermissionAuthorizer;
+export interface PermissionsService extends PermissionEvaluator {}
diff --git a/packages/backend-plugin-api/src/services/definitions/RootLifecycleService.ts b/packages/backend-plugin-api/src/services/definitions/RootLifecycleService.ts
index d97278da88..e0e09cb859 100644
--- a/packages/backend-plugin-api/src/services/definitions/RootLifecycleService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/RootLifecycleService.ts
@@ -17,4 +17,4 @@
 import { LifecycleService } from './LifecycleService';
 
 /** @public */
-export type RootLifecycleService = LifecycleService;
+export interface RootLifecycleService extends LifecycleService {}
diff --git a/packages/backend-plugin-api/src/services/definitions/RootLoggerService.ts b/packages/backend-plugin-api/src/services/definitions/RootLoggerService.ts
index 5fc595d91b..ad318ef53f 100644
--- a/packages/backend-plugin-api/src/services/definitions/RootLoggerService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/RootLoggerService.ts
@@ -17,4 +17,4 @@
 import { LoggerService } from './LoggerService';
 
 /** @public */
-export type RootLoggerService = LoggerService;
+export interface RootLoggerService extends LoggerService {}
diff --git a/packages/backend-plugin-api/src/services/definitions/SchedulerService.ts b/packages/backend-plugin-api/src/services/definitions/SchedulerService.ts
index f47e67596b..07c436bd6b 100644
--- a/packages/backend-plugin-api/src/services/definitions/SchedulerService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/SchedulerService.ts
@@ -17,4 +17,4 @@
 import { PluginTaskScheduler } from '@backstage/backend-tasks';
 
 /** @public */
-export type SchedulerService = PluginTaskScheduler;
+export interface SchedulerService extends PluginTaskScheduler {}
diff --git a/packages/backend-plugin-api/src/services/definitions/TokenManagerService.ts b/packages/backend-plugin-api/src/services/definitions/TokenManagerService.ts
index 0e7536fe93..7fccb60c7a 100644
--- a/packages/backend-plugin-api/src/services/definitions/TokenManagerService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/TokenManagerService.ts
@@ -17,4 +17,4 @@
 import { TokenManager } from '@backstage/backend-common';
 
 /** @public */
-export type TokenManagerService = TokenManager;
+export interface TokenManagerService extends TokenManager {}
diff --git a/packages/backend-plugin-api/src/services/definitions/UrlReaderService.ts b/packages/backend-plugin-api/src/services/definitions/UrlReaderService.ts
index 082d4fe91e..ef825a7fcd 100644
--- a/packages/backend-plugin-api/src/services/definitions/UrlReaderService.ts
+++ b/packages/backend-plugin-api/src/services/definitions/UrlReaderService.ts
@@ -21,7 +21,7 @@ import { Readable } from 'stream';
  *
  * @public
  */
-export type UrlReaderService = {
+export interface UrlReaderService {
   /**
    * Reads a single file and return its content.
    */
@@ -36,7 +36,7 @@ export type UrlReaderService = {
    * Searches for a file in a tree using a glob pattern.
    */
   search(url: string, options?: SearchOptions): Promise<SearchResponse>;
-};
+}
 
 /**
  * An options object for readUrl operations.