diff --git a/.changeset/shy-rabbits-drum.md b/.changeset/shy-rabbits-drum.md
new file mode 100644
index 000000000..0f8b192d9
--- /dev/null
+++ b/.changeset/shy-rabbits-drum.md
@@ -0,0 +1,6 @@
+---
+"@ensnode/ensnode-sdk": minor
+"ensapi": minor
+---
+
+Made `accurateAsOf` a required field in the Registrar Actions API response (`RegistrarActionsResponseOk`).
diff --git a/apps/ensapi/src/handlers/api/explore/registrar-actions-api.ts b/apps/ensapi/src/handlers/api/explore/registrar-actions-api.ts
index ae9eb3461..5b0a48892 100644
--- a/apps/ensapi/src/handlers/api/explore/registrar-actions-api.ts
+++ b/apps/ensapi/src/handlers/api/explore/registrar-actions-api.ts
@@ -101,6 +101,16 @@ async function fetchRegistrarActions(parentNode: Node | undefined, query: Regist
  */
 app.openapi(getRegistrarActionsRoute, async (c) => {
   try {
+    // Defensive: `registrarActionsApiMiddleware` already short-circuits with a
+    // serialized 503 when indexingStatus is an Error, so this branch is
+    // unreachable at runtime — kept only for TypeScript type narrowing.
+    if (c.var.indexingStatus instanceof Error) {
+      throw new Error("Indexing status has not been loaded yet");
+    }
+
+    // Get the accurateAsOf timestamp from the omnichain indexing cursor
+    const accurateAsOf = c.var.indexingStatus.snapshot.omnichainSnapshot.omnichainIndexingCursor;
+
     const query = c.req.valid("query");
     const { registrarActions, pageContext } = await fetchRegistrarActions(undefined, query);
 
@@ -110,6 +120,7 @@ app.openapi(getRegistrarActionsRoute, async (c) => {
         responseCode: RegistrarActionsResponseCodes.Ok,
         registrarActions,
         pageContext,
+        accurateAsOf,
       } satisfies RegistrarActionsResponseOk),
     );
   } catch (error) {
@@ -163,17 +174,20 @@ app.openapi(getRegistrarActionsRoute, async (c) => {
  */
 app.openapi(getRegistrarActionsByParentNodeRoute, async (c) => {
   try {
+    // Defensive: `registrarActionsApiMiddleware` already short-circuits with a
+    // serialized 503 when indexingStatus is an Error, so this branch is
+    // unreachable at runtime — kept only for TypeScript type narrowing.
     if (c.var.indexingStatus instanceof Error) {
       throw new Error("Indexing status has not been loaded yet");
     }
 
+    // Get the accurateAsOf timestamp from the omnichain indexing cursor
+    const accurateAsOf = c.var.indexingStatus.snapshot.omnichainSnapshot.omnichainIndexingCursor;
+
     const { parentNode } = c.req.valid("param");
     const query = c.req.valid("query");
     const { registrarActions, pageContext } = await fetchRegistrarActions(parentNode, query);
 
-    // Get the accurateAsOf timestamp from the slowest chain indexing cursor
-    const accurateAsOf = c.var.indexingStatus.snapshot.slowestChainIndexingCursor;
-
     // respond with success response
     return c.json(
       serializeRegistrarActionsResponse({
diff --git a/packages/ensnode-sdk/src/ensapi/api/registrar-actions/response.ts b/packages/ensnode-sdk/src/ensapi/api/registrar-actions/response.ts
index f87c87c42..1064fed7d 100644
--- a/packages/ensnode-sdk/src/ensapi/api/registrar-actions/response.ts
+++ b/packages/ensnode-sdk/src/ensapi/api/registrar-actions/response.ts
@@ -56,15 +56,11 @@ export type RegistrarActionsResponseOk = {
    * The {@link UnixTimestamp} of when the data used to build the list of {@link NamedRegistrarAction} was accurate as of.
    *
    * @remarks
-   * **Note:** This value represents the `slowestChainIndexingCursor` from the latest omnichain indexing status
+   * **Note:** This value represents the `omnichainIndexingCursor` from the latest omnichain indexing status
    * snapshot captured by ENSApi. The state returned in the response is guaranteed to be accurate as of this
    * timestamp but may be from a timestamp higher than this value.
-   *
-   * **Temporary:** This field is currently optional to maintain backward compatibility with ENS Awards
-   * using older snapshot NPM packages. This will be changed to required in a future release.
-   * See: https://github.com/namehash/ensnode/issues/1497
    */
-  accurateAsOf?: UnixTimestamp;
+  accurateAsOf: UnixTimestamp;
 };
 
 /**
diff --git a/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.test.ts b/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.test.ts
index eb7fe5320..33c6b868f 100644
--- a/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.test.ts
+++ b/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.test.ts
@@ -125,6 +125,12 @@ describe("ENSNode API Schema", () => {
       expect(() => makeRegistrarActionsResponseSchema().parse(validResponseOk)).not.toThrowError();
     });
 
+    it("rejects ResponseOk object missing required accurateAsOf", () => {
+      const { accurateAsOf: _accurateAsOf, ...invalidResponseOk } = validResponseOk;
+
+      expect(() => makeRegistrarActionsResponseSchema().parse(invalidResponseOk)).toThrowError();
+    });
+
     it("can parse valid ResponseError object", () => {
       const parsed = makeRegistrarActionsResponseSchema().parse(validResponseError);
 
diff --git a/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.ts b/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.ts
index 9057ddf4d..0e4b45c82 100644
--- a/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.ts
+++ b/packages/ensnode-sdk/src/ensapi/api/registrar-actions/zod-schemas.ts
@@ -43,7 +43,7 @@ export const makeRegistrarActionsResponseOkSchema = (
     responseCode: z.literal(RegistrarActionsResponseCodes.Ok),
     registrarActions: z.array(makeNamedRegistrarActionSchema(valueLabel)),
     pageContext: makeResponsePageContextSchema(`${valueLabel}.pageContext`),
-    accurateAsOf: makeUnixTimestampSchema(`${valueLabel}.accurateAsOf`).optional(),
+    accurateAsOf: makeUnixTimestampSchema(`${valueLabel}.accurateAsOf`),
   });
 
 /**