diff --git a/antd-java/src/main/java/com/autonomi/antd/GrpcAntdClient.java b/antd-java/src/main/java/com/autonomi/antd/GrpcAntdClient.java
index c238b305..b84e30c4 100644
--- a/antd-java/src/main/java/com/autonomi/antd/GrpcAntdClient.java
+++ b/antd-java/src/main/java/com/autonomi/antd/GrpcAntdClient.java
@@ -28,6 +28,14 @@
 import antd.v1.Chunks.PutChunkRequest;
 import antd.v1.Chunks.PutChunkResponse;
 
+import antd.v1.WalletServiceGrpc;
+import antd.v1.Wallet.GetWalletAddressRequest;
+import antd.v1.Wallet.GetWalletAddressResponse;
+import antd.v1.Wallet.GetWalletBalanceRequest;
+import antd.v1.Wallet.GetWalletBalanceResponse;
+import antd.v1.Wallet.WalletApproveRequest;
+import antd.v1.Wallet.WalletApproveResponse;
+
 import antd.v1.FileServiceGrpc;
 import antd.v1.Files.PutFileRequest;
 import antd.v1.Files.PutFileResponse;
@@ -74,6 +82,7 @@ public class GrpcAntdClient implements AutoCloseable {
     private final DataServiceGrpc.DataServiceBlockingStub dataStub;
     private final ChunkServiceGrpc.ChunkServiceBlockingStub chunkStub;
     private final FileServiceGrpc.FileServiceBlockingStub fileStub;
+    private final WalletServiceGrpc.WalletServiceBlockingStub walletStub;
     private final UploadServiceGrpc.UploadServiceBlockingStub uploadStub;
 
     public static GrpcAntdClient autoDiscover() {
@@ -98,6 +107,7 @@ public GrpcAntdClient(ManagedChannel channel) {
         this.dataStub = DataServiceGrpc.newBlockingStub(channel);
         this.chunkStub = ChunkServiceGrpc.newBlockingStub(channel);
         this.fileStub = FileServiceGrpc.newBlockingStub(channel);
+        this.walletStub = WalletServiceGrpc.newBlockingStub(channel);
         this.uploadStub = UploadServiceGrpc.newBlockingStub(channel);
     }
 
@@ -348,6 +358,42 @@ public UploadCostEstimate fileCost(String path, boolean isPublic) {
         return fileCost(path, isPublic, PaymentMode.AUTO);
     }
 
+    // Wallet — V2-286 parity with REST AntdClient.walletAddress/Balance/Approve.
+    // A missing daemon wallet emits gRPC FailedPrecondition which mapException
+    // surfaces as PaymentException (the established FailedPrecondition→Payment
+    // convention across all SDKs; semantic is a bit off vs REST's 503 but
+    // matches every other SDK).
+
+    public WalletAddress walletAddress() {
+        try {
+            GetWalletAddressResponse resp = walletStub.getAddress(
+                    GetWalletAddressRequest.getDefaultInstance());
+            return new WalletAddress(resp.getAddress());
+        } catch (StatusRuntimeException e) {
+            throw mapException(e);
+        }
+    }
+
+    public WalletBalance walletBalance() {
+        try {
+            GetWalletBalanceResponse resp = walletStub.getBalance(
+                    GetWalletBalanceRequest.getDefaultInstance());
+            return new WalletBalance(resp.getBalance(), resp.getGasBalance());
+        } catch (StatusRuntimeException e) {
+            throw mapException(e);
+        }
+    }
+
+    public boolean walletApprove() {
+        try {
+            WalletApproveResponse resp = walletStub.approve(
+                    WalletApproveRequest.getDefaultInstance());
+            return resp.getApproved();
+        } catch (StatusRuntimeException e) {
+            throw mapException(e);
+        }
+    }
+
     // External Signer (Upload + Chunks prepare/finalize)
 
     /**
diff --git a/antd-java/src/test/java/com/autonomi/antd/GrpcAntdClientTest.java b/antd-java/src/test/java/com/autonomi/antd/GrpcAntdClientTest.java
index c680fae5..25005f5e 100644
--- a/antd-java/src/test/java/com/autonomi/antd/GrpcAntdClientTest.java
+++ b/antd-java/src/test/java/com/autonomi/antd/GrpcAntdClientTest.java
@@ -87,6 +87,7 @@ void setUp() throws Exception {
                         .addService(new MockDataService())
                         .addService(new MockChunkService())
                         .addService(new MockFileService())
+                        .addService(new MockWalletService())
                         .addService(new MockUploadService())
                         .build()
                         .start();
@@ -775,4 +776,90 @@ void testFinalizeChunkUploadReturnsAddressAndForwardsBody() {
         String addr = client.finalizeChunkUpload("upid_chunk_42", tx);
         assertEquals("addr_for_upid_chunk_42", addr);
     }
+    // =========================================================================
+    // V2-286 MockWalletService + tests
+    // =========================================================================
+
+    static class MockWalletService extends antd.v1.WalletServiceGrpc.WalletServiceImplBase {
+        @Override
+        public void getAddress(antd.v1.Wallet.GetWalletAddressRequest req,
+                io.grpc.stub.StreamObserver<antd.v1.Wallet.GetWalletAddressResponse> resp) {
+            resp.onNext(antd.v1.Wallet.GetWalletAddressResponse.newBuilder()
+                    .setAddress("0xabc1234567890abcdef1234567890abcdef123456")
+                    .build());
+            resp.onCompleted();
+        }
+
+        @Override
+        public void getBalance(antd.v1.Wallet.GetWalletBalanceRequest req,
+                io.grpc.stub.StreamObserver<antd.v1.Wallet.GetWalletBalanceResponse> resp) {
+            resp.onNext(antd.v1.Wallet.GetWalletBalanceResponse.newBuilder()
+                    .setBalance("1000000000000000000")
+                    .setGasBalance("500000000000000000")
+                    .build());
+            resp.onCompleted();
+        }
+
+        @Override
+        public void approve(antd.v1.Wallet.WalletApproveRequest req,
+                io.grpc.stub.StreamObserver<antd.v1.Wallet.WalletApproveResponse> resp) {
+            resp.onNext(antd.v1.Wallet.WalletApproveResponse.newBuilder()
+                    .setApproved(true)
+                    .build());
+            resp.onCompleted();
+        }
+    }
+
+    @Test
+    void walletAddressReturnsAddress() {
+        com.autonomi.antd.models.WalletAddress r = client.walletAddress();
+        assertEquals("0xabc1234567890abcdef1234567890abcdef123456", r.address());
+    }
+
+    @Test
+    void walletBalanceReturnsBalances() {
+        com.autonomi.antd.models.WalletBalance r = client.walletBalance();
+        assertEquals("1000000000000000000", r.balance());
+        assertEquals("500000000000000000", r.gasBalance());
+    }
+
+    @Test
+    void walletApproveReturnsTrue() {
+        assertTrue(client.walletApprove());
+    }
+
+    /**
+     * Daemon emits gRPC FailedPrecondition for "wallet not configured"; the
+     * established mapping in GrpcAntdClient.mapException surfaces this as
+     * PaymentException. (Semantic is a bit off vs REST's 503 but matches every
+     * SDK.)
+     */
+    @Test
+    void walletAddressUnconfiguredReturnsPaymentException() throws Exception {
+        String serverName = InProcessServerBuilder.generateName();
+        Server errServer = InProcessServerBuilder.forName(serverName)
+                .directExecutor()
+                .addService(new antd.v1.WalletServiceGrpc.WalletServiceImplBase() {
+                    @Override
+                    public void getAddress(antd.v1.Wallet.GetWalletAddressRequest req,
+                            io.grpc.stub.StreamObserver<antd.v1.Wallet.GetWalletAddressResponse> resp) {
+                        resp.onError(io.grpc.Status.FAILED_PRECONDITION
+                                .withDescription("wallet not configured — set AUTONOMI_WALLET_KEY")
+                                .asRuntimeException());
+                    }
+                })
+                .build()
+                .start();
+        ManagedChannel ch = InProcessChannelBuilder.forName(serverName).directExecutor().build();
+        try (GrpcAntdClient c = new GrpcAntdClient(ch)) {
+            com.autonomi.antd.errors.PaymentException ex = assertThrows(
+                    com.autonomi.antd.errors.PaymentException.class,
+                    c::walletAddress);
+            assertTrue(ex.getMessage().contains("wallet not configured"));
+        } finally {
+            ch.shutdownNow();
+            errServer.shutdownNow();
+        }
+    }
+
 }