diff --git a/.changeset/wet-dragons-obey.md b/.changeset/wet-dragons-obey.md
new file mode 100644
index 00000000..1c995388
--- /dev/null
+++ b/.changeset/wet-dragons-obey.md
@@ -0,0 +1,5 @@
+---
+'@bnb-chain/greenfield-js-sdk': patch
+---
+
+feat: ed25519 support preview api
diff --git a/examples/nextjs/src/components/object/info/index.tsx b/examples/nextjs/src/components/object/info/index.tsx
index 1205bedc..e093f816 100644
--- a/examples/nextjs/src/components/object/info/index.tsx
+++ b/examples/nextjs/src/components/object/info/index.tsx
@@ -94,9 +94,10 @@ export const ObjectInfo = () => {
                 objectName,
                 queryMap: {
                   view: '1',
+                  'X-Gnfd-App-Reg-Public-Key': offChainData.keypairs.publicKey,
                   'X-Gnfd-User-Address': address,
                   'X-Gnfd-App-Domain': window.location.origin,
-                  'X-Gnfd-Expiry-Timestamp': '2023-09-03T09%3A23%3A39Z',
+                  'X-Gnfd-Expiry-Timestamp': '2024-03-12T09:39:22Z',
                 },
               },
               {
diff --git a/packages/js-sdk/src/api/offchainauth.ts b/packages/js-sdk/src/api/offchainauth.ts
index 01b8e58b..ab4a4ca2 100644
--- a/packages/js-sdk/src/api/offchainauth.ts
+++ b/packages/js-sdk/src/api/offchainauth.ts
@@ -70,9 +70,9 @@ export class OffChainAuth implements IOffChainAuth {
         code: 0,
         body: {
           seedString: hexlify(privateKey),
-          keypars: {
-            privateKey: hexlify(privateKey),
-            publicKey: hexlify(publicKey),
+          keypairs: {
+            privateKey: hexlify(privateKey).slice(2),
+            publicKey: hexlify(publicKey).slice(2),
           },
           expirationTime,
           spAddresses: successSps,
diff --git a/packages/js-sdk/src/types/storage.ts b/packages/js-sdk/src/types/storage.ts
index 012246d5..67b5e4e6 100644
--- a/packages/js-sdk/src/types/storage.ts
+++ b/packages/js-sdk/src/types/storage.ts
@@ -21,10 +21,13 @@ export interface IGenOffChainAuthKeyPairAndUpload extends IBaseUser {
 
 export interface IReturnOffChainAuthKeyPairAndUpload {
   /**
-   * compatibility: private key
+   * compatibility for old version: private key
    */
   seedString: string;
-  keypars: {
+  /**
+   * public key and private key without prefix `0x`
+   */
+  keypairs: {
     privateKey: string;
     publicKey: string;
   };