diff --git a/changelog.md b/changelog.md
index 2358197..2a5db55 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 2025-11-25 - 2.1.0 - feat(oci)
+Support configurable OCI token realm/service and centralize unauthorized responses
+
+- SmartRegistry now forwards optional ociTokens (realm and service) from auth configuration to OciRegistry when OCI is enabled
+- OciRegistry constructor accepts an optional ociTokens parameter and stores it for use in auth headers
+- Replaced repeated construction of WWW-Authenticate headers with createUnauthorizedResponse and createUnauthorizedHeadResponse helpers that use configured realm/service
+- Behavior is backwards-compatible: when ociTokens are not configured the registry falls back to the previous defaults (realm: <basePath>/v2/token, service: "registry")
+
 ## 2025-11-25 - 2.0.0 - BREAKING CHANGE(pypi,rubygems)
 Revise PyPI and RubyGems handling: normalize error payloads, fix .gem parsing/packing, adjust PyPI JSON API and tests, and export smartarchive plugin
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 8d94b15..1095f69 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartregistry',
-  version: '2.0.0',
+  version: '2.1.0',
   description: 'A composable TypeScript library implementing OCI, NPM, Maven, Cargo, Composer, PyPI, and RubyGems registries for building unified container and package registries'
 }
diff --git a/ts/classes.smartregistry.ts b/ts/classes.smartregistry.ts
index 81be292..4998963 100644
--- a/ts/classes.smartregistry.ts
+++ b/ts/classes.smartregistry.ts
@@ -42,7 +42,11 @@ export class SmartRegistry {
     // Initialize OCI registry if enabled
     if (this.config.oci?.enabled) {
       const ociBasePath = this.config.oci.basePath ?? '/oci';
-      const ociRegistry = new OciRegistry(this.storage, this.authManager, ociBasePath);
+      const ociTokens = this.config.auth.ociTokens?.enabled ? {
+        realm: this.config.auth.ociTokens.realm,
+        service: this.config.auth.ociTokens.service,
+      } : undefined;
+      const ociRegistry = new OciRegistry(this.storage, this.authManager, ociBasePath, ociTokens);
       await ociRegistry.init();
       this.registries.set('oci', ociRegistry);
     }
diff --git a/ts/oci/classes.ociregistry.ts b/ts/oci/classes.ociregistry.ts
index 8466d46..e7d7e49 100644
--- a/ts/oci/classes.ociregistry.ts
+++ b/ts/oci/classes.ociregistry.ts
@@ -20,12 +20,19 @@ export class OciRegistry extends BaseRegistry {
   private uploadSessions: Map<string, IUploadSession> = new Map();
   private basePath: string = '/oci';
   private cleanupInterval?: NodeJS.Timeout;
+  private ociTokens?: { realm: string; service: string };
 
-  constructor(storage: RegistryStorage, authManager: AuthManager, basePath: string = '/oci') {
+  constructor(
+    storage: RegistryStorage,
+    authManager: AuthManager,
+    basePath: string = '/oci',
+    ociTokens?: { realm: string; service: string }
+  ) {
     super();
     this.storage = storage;
     this.authManager = authManager;
     this.basePath = basePath;
+    this.ociTokens = ociTokens;
   }
 
   public async init(): Promise<void> {
@@ -280,13 +287,7 @@ export class OciRegistry extends BaseRegistry {
     headers?: Record<string, string>
   ): Promise<IResponse> {
     if (!await this.checkPermission(token, repository, 'pull')) {
-      return {
-        status: 401,
-        headers: {
-          'WWW-Authenticate': `Bearer realm="${this.basePath}/v2/token",service="registry",scope="repository:${repository}:pull"`,
-        },
-        body: this.createError('DENIED', 'Insufficient permissions'),
-      };
+      return this.createUnauthorizedResponse(repository, 'pull');
     }
 
     // Resolve tag to digest if needed
@@ -367,13 +368,7 @@ export class OciRegistry extends BaseRegistry {
     headers?: Record<string, string>
   ): Promise<IResponse> {
     if (!await this.checkPermission(token, repository, 'push')) {
-      return {
-        status: 401,
-        headers: {
-          'WWW-Authenticate': `Bearer realm="${this.basePath}/v2/token",service="registry",scope="repository:${repository}:push"`,
-        },
-        body: this.createError('DENIED', 'Insufficient permissions'),
-      };
+      return this.createUnauthorizedResponse(repository, 'push');
     }
 
     if (!body) {
@@ -685,10 +680,12 @@ export class OciRegistry extends BaseRegistry {
    * Per OCI Distribution Spec, 401 responses MUST include WWW-Authenticate header.
    */
   private createUnauthorizedResponse(repository: string, action: string): IResponse {
+    const realm = this.ociTokens?.realm || `${this.basePath}/v2/token`;
+    const service = this.ociTokens?.service || 'registry';
     return {
       status: 401,
       headers: {
-        'WWW-Authenticate': `Bearer realm="${this.basePath}/v2/token",service="registry",scope="repository:${repository}:${action}"`,
+        'WWW-Authenticate': `Bearer realm="${realm}",service="${service}",scope="repository:${repository}:${action}"`,
       },
       body: this.createError('DENIED', 'Insufficient permissions'),
     };
@@ -698,10 +695,12 @@ export class OciRegistry extends BaseRegistry {
    * Create an unauthorized HEAD response (no body per HTTP spec).
    */
   private createUnauthorizedHeadResponse(repository: string, action: string): IResponse {
+    const realm = this.ociTokens?.realm || `${this.basePath}/v2/token`;
+    const service = this.ociTokens?.service || 'registry';
     return {
       status: 401,
       headers: {
-        'WWW-Authenticate': `Bearer realm="${this.basePath}/v2/token",service="registry",scope="repository:${repository}:${action}"`,
+        'WWW-Authenticate': `Bearer realm="${realm}",service="${service}",scope="repository:${repository}:${action}"`,
       },
       body: null,
     };