diff --git a/.changeset/eleven-mirrors-fry.md b/.changeset/eleven-mirrors-fry.md
new file mode 100644
index 00000000..b98cca8c
--- /dev/null
+++ b/.changeset/eleven-mirrors-fry.md
@@ -0,0 +1,5 @@
+---
+'@bnb-chain/greenfield-js-sdk': patch
+---
+
+feat: Export Auth type
diff --git a/packages/js-sdk/src/api/bucket.ts b/packages/js-sdk/src/api/bucket.ts
index 1ddd2d44..71c23769 100644
--- a/packages/js-sdk/src/api/bucket.ts
+++ b/packages/js-sdk/src/api/bucket.ts
@@ -29,6 +29,7 @@ import { bytesToUtf8, hexToBytes } from 'ethereum-cryptography/utils';
 import Long from 'long';
 import { container, delay, inject, injectable } from 'tsyringe';
 import {
+  AuthType,
   GRNToString,
   MsgCreateBucketTypeUrl,
   MsgDeleteBucketTypeUrl,
@@ -65,7 +66,7 @@ import {
   getQueryBucketReadQuotaMetaInfo,
   parseReadQuotaResponse,
 } from '../clients/spclient/spApis/queryBucketReadQuota';
-import { AuthType, SpClient } from '../clients/spclient/spClient';
+import { SpClient } from '../clients/spclient/spClient';
 import { TxClient } from '../clients/txClient';
 import { METHOD_GET, NORMAL_ERROR_CODE } from '../constants/http';
 import { MsgCreateBucketSDKTypeEIP712 } from '../messages/greenfield/storage/MsgCreateBucket';
diff --git a/packages/js-sdk/src/api/objects.ts b/packages/js-sdk/src/api/objects.ts
index 53641df1..316f47ae 100644
--- a/packages/js-sdk/src/api/objects.ts
+++ b/packages/js-sdk/src/api/objects.ts
@@ -66,8 +66,9 @@ import {
   newObjectGRN,
 } from '..';
 import { RpcQueryClient } from '../clients/queryclient';
-import { AuthType, SpClient } from '../clients/spclient/spClient';
+import { SpClient } from '../clients/spclient/spClient';
 import {
+  AuthType,
   CreateObjectApprovalRequest,
   CreateObjectApprovalResponse,
   GetListObjectPoliciesRequest,
diff --git a/packages/js-sdk/src/api/payment.ts b/packages/js-sdk/src/api/payment.ts
index 1039e48a..77e062c5 100644
--- a/packages/js-sdk/src/api/payment.ts
+++ b/packages/js-sdk/src/api/payment.ts
@@ -29,6 +29,7 @@ import {
 } from '@bnb-chain/greenfield-cosmos-types/greenfield/payment/tx';
 import { container, delay, inject, injectable } from 'tsyringe';
 import {
+  AuthType,
   MsgDepositTypeUrl,
   MsgDisableRefundTypeUrl,
   MsgWithdrawTypeUrl,
@@ -41,7 +42,7 @@ import {
   getListUserPaymentAccountMetaInfo,
   parseListUserPaymentAccountResponse,
 } from '../clients/spclient/spApis/listUserPaymentAccounts';
-import { AuthType, SpClient } from '../clients/spclient/spClient';
+import { SpClient } from '../clients/spclient/spClient';
 import { TxClient } from '../clients/txClient';
 import { MsgDepositSDKTypeEIP712 } from '../messages/greenfield/payment/MsgDeposit';
 import { MsgDisableRefundSDKTypeEIP712 } from '../messages/greenfield/payment/MsgDisableRefund';
diff --git a/packages/js-sdk/src/clients/spclient/auth.ts b/packages/js-sdk/src/clients/spclient/auth.ts
index 9fea4cd2..8d50a96e 100644
--- a/packages/js-sdk/src/clients/spclient/auth.ts
+++ b/packages/js-sdk/src/clients/spclient/auth.ts
@@ -1,11 +1,10 @@
 import { signSignatureByEddsa } from '@/offchainauth';
-import { ReqMeta } from '@/types/auth';
+import { AuthType, ReqMeta } from '@/types/auth';
 import { hexlify, joinSignature } from '@ethersproject/bytes';
 import { SigningKey } from '@ethersproject/signing-key';
 import { Headers } from 'cross-fetch';
 import { keccak256 } from 'ethereum-cryptography/keccak.js';
 import { utf8ToBytes } from 'ethereum-cryptography/utils.js';
-import { AuthType } from './spClient';
 
 export const getCanonicalHeaders = (reqMeta: Partial<ReqMeta>, reqHeaders: Headers) => {
   const sortedHeaders = getSortedHeaders(reqHeaders, SUPPORTED_HEADERS);
diff --git a/packages/js-sdk/src/clients/spclient/spClient.ts b/packages/js-sdk/src/clients/spclient/spClient.ts
index 05db7865..9f748199 100644
--- a/packages/js-sdk/src/clients/spclient/spClient.ts
+++ b/packages/js-sdk/src/clients/spclient/spClient.ts
@@ -7,29 +7,11 @@ import {
 } from '@/clients/spclient/auth';
 import { parseError } from '@/clients/spclient/spApis/parseError';
 import { SP_NOT_AVAILABLE_ERROR_CODE, SP_NOT_AVAILABLE_ERROR_MSG } from '@/constants/http';
-import { ReqMeta } from '@/types/auth';
+import { AuthType, ReqMeta } from '@/types/auth';
 import { injectable } from 'tsyringe';
 import { getGetObjectMetaInfo } from './spApis/getObject';
 import { getPutObjectMetaInfo } from './spApis/putObject';
 
-/**
- * ECDSA Signature
- */
-export type ECDSA = {
-  type: 'ECDSA';
-  privateKey: string;
-};
-/**
- * EDDSA Signature
- */
-export type EDDSA = {
-  type: 'EDDSA';
-  seed: string;
-  domain: string;
-  address: string;
-};
-export type AuthType = ECDSA | EDDSA;
-
 export interface ISpClient {
   callApi(
     url: string,
diff --git a/packages/js-sdk/src/types/auth.ts b/packages/js-sdk/src/types/auth.ts
index a577d7c9..e77959b7 100644
--- a/packages/js-sdk/src/types/auth.ts
+++ b/packages/js-sdk/src/types/auth.ts
@@ -1,5 +1,23 @@
 import { METHOD_GET, METHOD_POST, METHOD_PUT } from '@/constants/http';
 
+/**
+ * ECDSA Signature
+ */
+export type ECDSA = {
+  type: 'ECDSA';
+  privateKey: string;
+};
+/**
+ * EDDSA Signature
+ */
+export type EDDSA = {
+  type: 'EDDSA';
+  seed: string;
+  domain: string;
+  address: string;
+};
+export type AuthType = ECDSA | EDDSA;
+
 export interface ReqMeta {
   method: typeof METHOD_GET | typeof METHOD_POST | typeof METHOD_PUT;
   contentType: string;