diff --git a/antd-go/README.md b/antd-go/README.md
index bef16f0..934b646 100644
--- a/antd-go/README.md
+++ b/antd-go/README.md
@@ -30,7 +30,8 @@ func main() {
     if err != nil {
         log.Fatal(err)
     }
-    fmt.Printf("OK: %v, Network: %s\n", health.OK, health.Network)
+    fmt.Printf("OK: %v, Network: %s, Version: %s, EVM: %s\n",
+        health.OK, health.Network, health.Version, health.EvmNetwork)
 
     // Store data
     result, err := client.DataPutPublic(ctx, []byte("Hello, Autonomi!"))
@@ -88,7 +89,7 @@ All methods take a `context.Context` as the first parameter for cancellation and
 ### Health
 | Method | Description |
 |--------|-------------|
-| `Health(ctx)` | Check daemon status |
+| `Health(ctx)` | Check daemon status — returns `*HealthStatus` with daemon version, EVM network, uptime, build commit, and payment contract addresses |
 
 ### Data (Immutable)
 | Method | Description |
@@ -167,7 +168,8 @@ func main() {
     if err != nil {
         log.Fatal(err)
     }
-    fmt.Printf("OK: %v, Network: %s\n", health.OK, health.Network)
+    fmt.Printf("OK: %v, Network: %s, Version: %s, EVM: %s\n",
+        health.OK, health.Network, health.Version, health.EvmNetwork)
 
     result, err := client.DataPutPublic(ctx, []byte("Hello via gRPC!"))
     if err != nil {
diff --git a/antd-go/client.go b/antd-go/client.go
index ac79189..e5a8d80 100644
--- a/antd-go/client.go
+++ b/antd-go/client.go
@@ -167,8 +167,14 @@ func (c *Client) Health(ctx context.Context) (*HealthStatus, error) {
 		return nil, err
 	}
 	return &HealthStatus{
-		OK:      str(j, "status") == "ok",
-		Network: str(j, "network"),
+		OK:                  str(j, "status") == "ok",
+		Network:             str(j, "network"),
+		Version:             str(j, "version"),
+		EvmNetwork:          str(j, "evm_network"),
+		UptimeSeconds:       unum64(j, "uptime_seconds"),
+		BuildCommit:         str(j, "build_commit"),
+		PaymentTokenAddress: str(j, "payment_token_address"),
+		PaymentVaultAddress: str(j, "payment_vault_address"),
 	}, nil
 }
 
diff --git a/antd-go/client_test.go b/antd-go/client_test.go
index 4159c8e..f1b4090 100644
--- a/antd-go/client_test.go
+++ b/antd-go/client_test.go
@@ -19,7 +19,16 @@ func mockDaemon(t *testing.T) *httptest.Server {
 		switch {
 		// Health
 		case r.Method == "GET" && r.URL.Path == "/health":
-			json.NewEncoder(w).Encode(map[string]any{"status": "ok", "network": "local"})
+			json.NewEncoder(w).Encode(map[string]any{
+				"status":                "ok",
+				"network":               "local",
+				"version":               "0.4.0",
+				"evm_network":           "local",
+				"uptime_seconds":        42,
+				"build_commit":          "abcdef123456",
+				"payment_token_address": "0xtoken",
+				"payment_vault_address": "0xvault",
+			})
 
 		// Data put public
 		case r.Method == "POST" && r.URL.Path == "/v1/data/public":
@@ -142,6 +151,12 @@ func TestHealth(t *testing.T) {
 	if !h.OK || h.Network != "local" {
 		t.Fatalf("unexpected health: %+v", h)
 	}
+	if h.Version != "0.4.0" || h.EvmNetwork != "local" || h.UptimeSeconds != 42 {
+		t.Fatalf("unexpected diagnostic fields: %+v", h)
+	}
+	if h.BuildCommit != "abcdef123456" || h.PaymentTokenAddress != "0xtoken" || h.PaymentVaultAddress != "0xvault" {
+		t.Fatalf("unexpected build/payment fields: %+v", h)
+	}
 }
 
 func TestDataPublic(t *testing.T) {
diff --git a/antd-go/grpc_client.go b/antd-go/grpc_client.go
index af715fb..18140e5 100644
--- a/antd-go/grpc_client.go
+++ b/antd-go/grpc_client.go
@@ -155,8 +155,14 @@ func (c *GrpcClient) Health(ctx context.Context) (*HealthStatus, error) {
 		return nil, errorFromGrpc(err)
 	}
 	return &HealthStatus{
-		OK:      resp.GetStatus() == "ok",
-		Network: resp.GetNetwork(),
+		OK:                  resp.GetStatus() == "ok",
+		Network:             resp.GetNetwork(),
+		Version:             resp.GetVersion(),
+		EvmNetwork:          resp.GetEvmNetwork(),
+		UptimeSeconds:       resp.GetUptimeSeconds(),
+		BuildCommit:         resp.GetBuildCommit(),
+		PaymentTokenAddress: resp.GetPaymentTokenAddress(),
+		PaymentVaultAddress: resp.GetPaymentVaultAddress(),
 	}, nil
 }
 
diff --git a/antd-go/grpc_client_test.go b/antd-go/grpc_client_test.go
index 8a32f68..a9e8f34 100644
--- a/antd-go/grpc_client_test.go
+++ b/antd-go/grpc_client_test.go
@@ -26,8 +26,14 @@ type mockHealthService struct {
 
 func (m *mockHealthService) Check(_ context.Context, _ *pb.HealthCheckRequest) (*pb.HealthCheckResponse, error) {
 	return &pb.HealthCheckResponse{
-		Status:  "ok",
-		Network: "local",
+		Status:              "ok",
+		Network:             "local",
+		Version:             "0.4.0",
+		EvmNetwork:          "local",
+		UptimeSeconds:       42,
+		BuildCommit:         "abcdef123456",
+		PaymentTokenAddress: "0xtoken",
+		PaymentVaultAddress: "0xvault",
 	}, nil
 }
 
@@ -222,6 +228,12 @@ func TestGrpcHealth(t *testing.T) {
 	if !h.OK || h.Network != "local" {
 		t.Fatalf("unexpected health: %+v", h)
 	}
+	if h.Version != "0.4.0" || h.EvmNetwork != "local" || h.UptimeSeconds != 42 {
+		t.Fatalf("unexpected diagnostic fields: %+v", h)
+	}
+	if h.BuildCommit != "abcdef123456" || h.PaymentTokenAddress != "0xtoken" || h.PaymentVaultAddress != "0xvault" {
+		t.Fatalf("unexpected build/payment fields: %+v", h)
+	}
 }
 
 func TestGrpcDataPutPublic(t *testing.T) {
diff --git a/antd-go/models.go b/antd-go/models.go
index 1120f53..deeddc6 100644
--- a/antd-go/models.go
+++ b/antd-go/models.go
@@ -2,8 +2,14 @@ package antd
 
 // HealthStatus is the result of a health check.
 type HealthStatus struct {
-	OK      bool   `json:"ok"`
-	Network string `json:"network"`
+	OK                  bool   `json:"ok"`
+	Network             string `json:"network"`
+	Version             string `json:"version"`        // antd crate version
+	EvmNetwork          string `json:"evm_network"`    // arbitrum-one, arbitrum-sepolia, local, custom
+	UptimeSeconds       uint64 `json:"uptime_seconds"` // seconds since daemon start
+	BuildCommit         string `json:"build_commit"`   // short git SHA, "" if unknown
+	PaymentTokenAddress string `json:"payment_token_address"`
+	PaymentVaultAddress string `json:"payment_vault_address"`
 }
 
 // PutResult is the result of a put/create operation.
diff --git a/antd-go/proto/antd/v1/chunks.pb.go b/antd-go/proto/antd/v1/chunks.pb.go
index a034ce6..fd28b76 100644
--- a/antd-go/proto/antd/v1/chunks.pb.go
+++ b/antd-go/proto/antd/v1/chunks.pb.go
@@ -221,8 +221,7 @@ const file_antd_v1_chunks_proto_rawDesc = "" +
 	"\aaddress\x18\x02 \x01(\tR\aaddress2\x86\x01\n" +
 	"\fChunkService\x12:\n" +
 	"\x03Get\x12\x18.antd.v1.GetChunkRequest\x1a\x19.antd.v1.GetChunkResponse\x12:\n" +
-	"\x03Put\x12\x18.antd.v1.PutChunkRequest\x1a\x19.antd.v1.PutChunkResponseB\n" +
-	"\xaa\x02\aAntd.V1b\x06proto3"
+	"\x03Put\x12\x18.antd.v1.PutChunkRequest\x1a\x19.antd.v1.PutChunkResponseBDZ8github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1\xaa\x02\aAntd.V1b\x06proto3"
 
 var (
 	file_antd_v1_chunks_proto_rawDescOnce sync.Once
diff --git a/antd-go/proto/antd/v1/common.pb.go b/antd-go/proto/antd/v1/common.pb.go
index 189c50b..4939f69 100644
--- a/antd-go/proto/antd/v1/common.pb.go
+++ b/antd-go/proto/antd/v1/common.pb.go
@@ -22,15 +22,12 @@ const (
 )
 
 type Cost struct {
-	state      protoimpl.MessageState `protogen:"open.v1"`
-	AttoTokens string                 `protobuf:"bytes,1,opt,name=atto_tokens,json=attoTokens,proto3" json:"atto_tokens,omitempty"` // AttoTokens as string (can exceed JS Number.MAX_SAFE_INTEGER)
-	// Fields populated only by cost-estimation RPCs (GetCost, GetFileCost).
-	// Left at zero/empty for cost values returned by put/upload RPCs, where
-	// payment already happened and these fields are not meaningful.
-	FileSize            uint64 `protobuf:"varint,2,opt,name=file_size,json=fileSize,proto3" json:"file_size,omitempty"`                                     // original file size in bytes
-	ChunkCount          uint32 `protobuf:"varint,3,opt,name=chunk_count,json=chunkCount,proto3" json:"chunk_count,omitempty"`                               // number of data chunks the file splits into
-	EstimatedGasCostWei string `protobuf:"bytes,4,opt,name=estimated_gas_cost_wei,json=estimatedGasCostWei,proto3" json:"estimated_gas_cost_wei,omitempty"` // gas heuristic as string (can exceed JS safe int)
-	PaymentMode         string `protobuf:"bytes,5,opt,name=payment_mode,json=paymentMode,proto3" json:"payment_mode,omitempty"`                             // "auto" | "merkle" | "single"
+	state               protoimpl.MessageState `protogen:"open.v1"`
+	AttoTokens          string                 `protobuf:"bytes,1,opt,name=atto_tokens,json=attoTokens,proto3" json:"atto_tokens,omitempty"`                                // storage cost in atto tokens as string
+	FileSize            uint64                 `protobuf:"varint,2,opt,name=file_size,json=fileSize,proto3" json:"file_size,omitempty"`                                     // original file size in bytes
+	ChunkCount          uint32                 `protobuf:"varint,3,opt,name=chunk_count,json=chunkCount,proto3" json:"chunk_count,omitempty"`                               // number of data chunks the file splits into
+	EstimatedGasCostWei string                 `protobuf:"bytes,4,opt,name=estimated_gas_cost_wei,json=estimatedGasCostWei,proto3" json:"estimated_gas_cost_wei,omitempty"` // gas heuristic as string (can exceed JS safe int)
+	PaymentMode         string                 `protobuf:"bytes,5,opt,name=payment_mode,json=paymentMode,proto3" json:"payment_mode,omitempty"`                             // "auto" | "merkle" | "single"
 	unknownFields       protoimpl.UnknownFields
 	sizeCache           protoimpl.SizeCache
 }
@@ -306,8 +303,7 @@ const file_antd_v1_common_proto_rawDesc = "" +
 	"\x0fGraphDescendant\x12\x1d\n" +
 	"\n" +
 	"public_key\x18\x01 \x01(\tR\tpublicKey\x12\x18\n" +
-	"\acontent\x18\x02 \x01(\tR\acontentB\n" +
-	"\xaa\x02\aAntd.V1b\x06proto3"
+	"\acontent\x18\x02 \x01(\tR\acontentBDZ8github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1\xaa\x02\aAntd.V1b\x06proto3"
 
 var (
 	file_antd_v1_common_proto_rawDescOnce sync.Once
diff --git a/antd-go/proto/antd/v1/data.pb.go b/antd-go/proto/antd/v1/data.pb.go
index 8ef262e..c29b1ab 100644
--- a/antd-go/proto/antd/v1/data.pb.go
+++ b/antd-go/proto/antd/v1/data.pb.go
@@ -558,8 +558,7 @@ const file_antd_v1_data_proto_rawDesc = "" +
 	"GetPrivate\x12\x1e.antd.v1.GetPrivateDataRequest\x1a\x1f.antd.v1.GetPrivateDataResponse\x12M\n" +
 	"\n" +
 	"PutPrivate\x12\x1e.antd.v1.PutPrivateDataRequest\x1a\x1f.antd.v1.PutPrivateDataResponse\x122\n" +
-	"\aGetCost\x12\x18.antd.v1.DataCostRequest\x1a\r.antd.v1.CostB\n" +
-	"\xaa\x02\aAntd.V1b\x06proto3"
+	"\aGetCost\x12\x18.antd.v1.DataCostRequest\x1a\r.antd.v1.CostBDZ8github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1\xaa\x02\aAntd.V1b\x06proto3"
 
 var (
 	file_antd_v1_data_proto_rawDescOnce sync.Once
diff --git a/antd-go/proto/antd/v1/events.pb.go b/antd-go/proto/antd/v1/events.pb.go
index 8353ce0..a863d51 100644
--- a/antd-go/proto/antd/v1/events.pb.go
+++ b/antd-go/proto/antd/v1/events.pb.go
@@ -137,8 +137,7 @@ const file_antd_v1_events_proto_rawDesc = "" +
 	"\x14records_already_paid\x18\x03 \x01(\x04R\x12recordsAlreadyPaid\x12!\n" +
 	"\ftokens_spent\x18\x04 \x01(\tR\vtokensSpent2S\n" +
 	"\fEventService\x12C\n" +
-	"\tSubscribe\x12\x19.antd.v1.SubscribeRequest\x1a\x19.antd.v1.ClientEventProto0\x01B\n" +
-	"\xaa\x02\aAntd.V1b\x06proto3"
+	"\tSubscribe\x12\x19.antd.v1.SubscribeRequest\x1a\x19.antd.v1.ClientEventProto0\x01BDZ8github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1\xaa\x02\aAntd.V1b\x06proto3"
 
 var (
 	file_antd_v1_events_proto_rawDescOnce sync.Once
diff --git a/antd-go/proto/antd/v1/files.pb.go b/antd-go/proto/antd/v1/files.pb.go
index 930e63b..202059e 100644
--- a/antd-go/proto/antd/v1/files.pb.go
+++ b/antd-go/proto/antd/v1/files.pb.go
@@ -311,8 +311,7 @@ const file_antd_v1_files_proto_rawDesc = "" +
 	"\x0eDownloadPublic\x12\x1e.antd.v1.DownloadPublicRequest\x1a\x19.antd.v1.DownloadResponse\x12L\n" +
 	"\x0fDirUploadPublic\x12\x1a.antd.v1.UploadFileRequest\x1a\x1d.antd.v1.UploadPublicResponse\x12N\n" +
 	"\x11DirDownloadPublic\x12\x1e.antd.v1.DownloadPublicRequest\x1a\x19.antd.v1.DownloadResponse\x126\n" +
-	"\vGetFileCost\x12\x18.antd.v1.FileCostRequest\x1a\r.antd.v1.CostB\n" +
-	"\xaa\x02\aAntd.V1b\x06proto3"
+	"\vGetFileCost\x12\x18.antd.v1.FileCostRequest\x1a\r.antd.v1.CostBDZ8github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1\xaa\x02\aAntd.V1b\x06proto3"
 
 var (
 	file_antd_v1_files_proto_rawDescOnce sync.Once
diff --git a/antd-go/proto/antd/v1/health.pb.go b/antd-go/proto/antd/v1/health.pb.go
index c63736f..62b6e75 100644
--- a/antd-go/proto/antd/v1/health.pb.go
+++ b/antd-go/proto/antd/v1/health.pb.go
@@ -58,11 +58,17 @@ func (*HealthCheckRequest) Descriptor() ([]byte, []int) {
 }
 
 type HealthCheckResponse struct {
-	state         protoimpl.MessageState `protogen:"open.v1"`
-	Status        string                 `protobuf:"bytes,1,opt,name=status,proto3" json:"status,omitempty"`   // "ok"
-	Network       string                 `protobuf:"bytes,2,opt,name=network,proto3" json:"network,omitempty"` // "default", "local", "alpha"
-	unknownFields protoimpl.UnknownFields
-	sizeCache     protoimpl.SizeCache
+	state               protoimpl.MessageState `protogen:"open.v1"`
+	Status              string                 `protobuf:"bytes,1,opt,name=status,proto3" json:"status,omitempty"`                                                        // "ok"
+	Network             string                 `protobuf:"bytes,2,opt,name=network,proto3" json:"network,omitempty"`                                                      // "default", "local", "alpha"
+	Version             string                 `protobuf:"bytes,3,opt,name=version,proto3" json:"version,omitempty"`                                                      // antd crate version (e.g. "0.4.0")
+	EvmNetwork          string                 `protobuf:"bytes,4,opt,name=evm_network,json=evmNetwork,proto3" json:"evm_network,omitempty"`                              // EVM preset: "arbitrum-one", "arbitrum-sepolia", "local", "custom"
+	UptimeSeconds       uint64                 `protobuf:"varint,5,opt,name=uptime_seconds,json=uptimeSeconds,proto3" json:"uptime_seconds,omitempty"`                    // seconds since process start
+	BuildCommit         string                 `protobuf:"bytes,6,opt,name=build_commit,json=buildCommit,proto3" json:"build_commit,omitempty"`                           // short git SHA, or "" if built outside a git checkout
+	PaymentTokenAddress string                 `protobuf:"bytes,7,opt,name=payment_token_address,json=paymentTokenAddress,proto3" json:"payment_token_address,omitempty"` // token contract, or "" if unconfigured
+	PaymentVaultAddress string                 `protobuf:"bytes,8,opt,name=payment_vault_address,json=paymentVaultAddress,proto3" json:"payment_vault_address,omitempty"` // payment vault contract, or "" if unconfigured
+	unknownFields       protoimpl.UnknownFields
+	sizeCache           protoimpl.SizeCache
 }
 
 func (x *HealthCheckResponse) Reset() {
@@ -109,18 +115,66 @@ func (x *HealthCheckResponse) GetNetwork() string {
 	return ""
 }
 
+func (x *HealthCheckResponse) GetVersion() string {
+	if x != nil {
+		return x.Version
+	}
+	return ""
+}
+
+func (x *HealthCheckResponse) GetEvmNetwork() string {
+	if x != nil {
+		return x.EvmNetwork
+	}
+	return ""
+}
+
+func (x *HealthCheckResponse) GetUptimeSeconds() uint64 {
+	if x != nil {
+		return x.UptimeSeconds
+	}
+	return 0
+}
+
+func (x *HealthCheckResponse) GetBuildCommit() string {
+	if x != nil {
+		return x.BuildCommit
+	}
+	return ""
+}
+
+func (x *HealthCheckResponse) GetPaymentTokenAddress() string {
+	if x != nil {
+		return x.PaymentTokenAddress
+	}
+	return ""
+}
+
+func (x *HealthCheckResponse) GetPaymentVaultAddress() string {
+	if x != nil {
+		return x.PaymentVaultAddress
+	}
+	return ""
+}
+
 var File_antd_v1_health_proto protoreflect.FileDescriptor
 
 const file_antd_v1_health_proto_rawDesc = "" +
 	"\n" +
 	"\x14antd/v1/health.proto\x12\aantd.v1\"\x14\n" +
-	"\x12HealthCheckRequest\"G\n" +
+	"\x12HealthCheckRequest\"\xb4\x02\n" +
 	"\x13HealthCheckResponse\x12\x16\n" +
 	"\x06status\x18\x01 \x01(\tR\x06status\x12\x18\n" +
-	"\anetwork\x18\x02 \x01(\tR\anetwork2S\n" +
+	"\anetwork\x18\x02 \x01(\tR\anetwork\x12\x18\n" +
+	"\aversion\x18\x03 \x01(\tR\aversion\x12\x1f\n" +
+	"\vevm_network\x18\x04 \x01(\tR\n" +
+	"evmNetwork\x12%\n" +
+	"\x0euptime_seconds\x18\x05 \x01(\x04R\ruptimeSeconds\x12!\n" +
+	"\fbuild_commit\x18\x06 \x01(\tR\vbuildCommit\x122\n" +
+	"\x15payment_token_address\x18\a \x01(\tR\x13paymentTokenAddress\x122\n" +
+	"\x15payment_vault_address\x18\b \x01(\tR\x13paymentVaultAddress2S\n" +
 	"\rHealthService\x12B\n" +
-	"\x05Check\x12\x1b.antd.v1.HealthCheckRequest\x1a\x1c.antd.v1.HealthCheckResponseB\n" +
-	"\xaa\x02\aAntd.V1b\x06proto3"
+	"\x05Check\x12\x1b.antd.v1.HealthCheckRequest\x1a\x1c.antd.v1.HealthCheckResponseBDZ8github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1\xaa\x02\aAntd.V1b\x06proto3"
 
 var (
 	file_antd_v1_health_proto_rawDescOnce sync.Once
diff --git a/antd-rust/src/grpc_tests.rs b/antd-rust/src/grpc_tests.rs
index 888ed66..1ed5892 100644
--- a/antd-rust/src/grpc_tests.rs
+++ b/antd-rust/src/grpc_tests.rs
@@ -20,6 +20,11 @@ impl v1::health_service_server::HealthService for MockHealthService {
         Ok(Response::new(v1::HealthCheckResponse {
             status: "ok".to_string(),
             network: "local".to_string(),
+            // Diagnostic fields added in 0.4.0 — left as defaults here
+            // because antd-rust's HealthStatus model has not yet been
+            // extended (tracked in issue #37). The mock just needs to
+            // satisfy the wire type.
+            ..Default::default()
         }))
     }
 }
diff --git a/antd/Cargo.lock b/antd/Cargo.lock
index d95c955..f381c84 100644
--- a/antd/Cargo.lock
+++ b/antd/Cargo.lock
@@ -932,7 +932,7 @@ dependencies = [
 
 [[package]]
 name = "antd"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "ant-core",
  "axum 0.8.9",
diff --git a/antd/Cargo.toml b/antd/Cargo.toml
index 8b78404..404ea23 100644
--- a/antd/Cargo.toml
+++ b/antd/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "antd"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 
 [dependencies]
diff --git a/antd/build.rs b/antd/build.rs
index b19c967..4a12b27 100644
--- a/antd/build.rs
+++ b/antd/build.rs
@@ -1,4 +1,20 @@
+use std::process::Command;
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Capture short git SHA for /health diagnostics. Falls back to "" when
+    // built outside a git checkout (e.g. crates.io source distribution) — the
+    // /health endpoint reports the empty string in that case.
+    let commit = Command::new("git")
+        .args(["rev-parse", "--short=12", "HEAD"])
+        .output()
+        .ok()
+        .filter(|o| o.status.success())
+        .map(|o| String::from_utf8_lossy(&o.stdout).trim().to_string())
+        .unwrap_or_default();
+    println!("cargo:rustc-env=ANTD_BUILD_COMMIT={commit}");
+    println!("cargo:rerun-if-changed=.git/HEAD");
+    println!("cargo:rerun-if-changed=.git/refs/heads");
+
     tonic_build::configure()
         .build_client(false)
         .build_server(true)
diff --git a/antd/openapi.yaml b/antd/openapi.yaml
index 36c90d9..f7526c8 100644
--- a/antd/openapi.yaml
+++ b/antd/openapi.yaml
@@ -519,7 +519,15 @@ components:
     # -- Health --
     HealthResponse:
       type: object
-      required: [status, network]
+      required:
+        - status
+        - network
+        - version
+        - evm_network
+        - uptime_seconds
+        - build_commit
+        - payment_token_address
+        - payment_vault_address
       properties:
         status:
           type: string
@@ -528,6 +536,32 @@ components:
           type: string
           example: "local"
           description: "Network name: default, local, or alpha"
+        version:
+          type: string
+          example: "0.4.0"
+          description: "antd crate version (CARGO_PKG_VERSION)"
+        evm_network:
+          type: string
+          example: "arbitrum-one"
+          description: "EVM preset: arbitrum-one, arbitrum-sepolia, local, or custom"
+        uptime_seconds:
+          type: integer
+          format: int64
+          minimum: 0
+          example: 12345
+          description: "Seconds since the daemon process started"
+        build_commit:
+          type: string
+          example: "1cbfb3ec85ad"
+          description: "Short git SHA captured at build time, or empty if unknown"
+        payment_token_address:
+          type: string
+          example: "0xde817De9d8AC8C3aA10C3Ed0EE5FCB6C53cE7B0a"
+          description: "Payment token contract address, or empty if unconfigured"
+        payment_vault_address:
+          type: string
+          example: "0x607483B50C5F06c25cDC316b6d1E071084EeC9f5"
+          description: "Payment vault contract address, or empty if unconfigured"
 
     # -- Data --
     DataPutRequest:
diff --git a/antd/proto/antd/v1/chunks.proto b/antd/proto/antd/v1/chunks.proto
index 66443f7..09bb9b4 100644
--- a/antd/proto/antd/v1/chunks.proto
+++ b/antd/proto/antd/v1/chunks.proto
@@ -3,6 +3,7 @@ syntax = "proto3";
 package antd.v1;
 
 option csharp_namespace = "Antd.V1";
+option go_package = "github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1";
 
 import "antd/v1/common.proto";
 
diff --git a/antd/proto/antd/v1/common.proto b/antd/proto/antd/v1/common.proto
index 9646083..f4f44b8 100644
--- a/antd/proto/antd/v1/common.proto
+++ b/antd/proto/antd/v1/common.proto
@@ -3,6 +3,7 @@ syntax = "proto3";
 package antd.v1;
 
 option csharp_namespace = "Antd.V1";
+option go_package = "github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1";
 
 message Cost {
   string atto_tokens = 1;             // storage cost in atto tokens as string
diff --git a/antd/proto/antd/v1/data.proto b/antd/proto/antd/v1/data.proto
index 2b1ea69..79f041c 100644
--- a/antd/proto/antd/v1/data.proto
+++ b/antd/proto/antd/v1/data.proto
@@ -3,6 +3,7 @@ syntax = "proto3";
 package antd.v1;
 
 option csharp_namespace = "Antd.V1";
+option go_package = "github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1";
 
 import "antd/v1/common.proto";
 
diff --git a/antd/proto/antd/v1/events.proto b/antd/proto/antd/v1/events.proto
index 5781714..cf498e3 100644
--- a/antd/proto/antd/v1/events.proto
+++ b/antd/proto/antd/v1/events.proto
@@ -3,6 +3,7 @@ syntax = "proto3";
 package antd.v1;
 
 option csharp_namespace = "Antd.V1";
+option go_package = "github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1";
 
 service EventService {
   rpc Subscribe(SubscribeRequest) returns (stream ClientEventProto);
diff --git a/antd/proto/antd/v1/files.proto b/antd/proto/antd/v1/files.proto
index 57d4958..6ad6a25 100644
--- a/antd/proto/antd/v1/files.proto
+++ b/antd/proto/antd/v1/files.proto
@@ -3,6 +3,7 @@ syntax = "proto3";
 package antd.v1;
 
 option csharp_namespace = "Antd.V1";
+option go_package = "github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1";
 
 import "antd/v1/common.proto";
 
diff --git a/antd/proto/antd/v1/health.proto b/antd/proto/antd/v1/health.proto
index b98c774..35cea5a 100644
--- a/antd/proto/antd/v1/health.proto
+++ b/antd/proto/antd/v1/health.proto
@@ -3,6 +3,7 @@ syntax = "proto3";
 package antd.v1;
 
 option csharp_namespace = "Antd.V1";
+option go_package = "github.com/WithAutonomi/ant-sdk/antd-go/proto/antd/v1;v1";
 
 service HealthService {
   rpc Check(HealthCheckRequest) returns (HealthCheckResponse);
@@ -13,4 +14,10 @@ message HealthCheckRequest {}
 message HealthCheckResponse {
   string status = 1;  // "ok"
   string network = 2; // "default", "local", "alpha"
+  string version = 3; // antd crate version (e.g. "0.4.0")
+  string evm_network = 4; // EVM preset: "arbitrum-one", "arbitrum-sepolia", "local", "custom"
+  uint64 uptime_seconds = 5; // seconds since process start
+  string build_commit = 6; // short git SHA, or "" if built outside a git checkout
+  string payment_token_address = 7; // token contract, or "" if unconfigured
+  string payment_vault_address = 8; // payment vault contract, or "" if unconfigured
 }
diff --git a/antd/src/grpc/mod.rs b/antd/src/grpc/mod.rs
index efc9898..a2a772c 100644
--- a/antd/src/grpc/mod.rs
+++ b/antd/src/grpc/mod.rs
@@ -31,7 +31,7 @@ pub async fn serve(
         state: state.clone(),
     });
     let health_svc = HealthServiceServer::new(service::HealthServiceImpl {
-        network: state.network.clone(),
+        state: state.clone(),
     });
 
     let addr = listener.local_addr()?;
diff --git a/antd/src/grpc/service.rs b/antd/src/grpc/service.rs
index 2d1dc63..0e72ae0 100644
--- a/antd/src/grpc/service.rs
+++ b/antd/src/grpc/service.rs
@@ -21,7 +21,7 @@ fn not_implemented(op: &str) -> Status {
 // ── HealthService ──
 
 pub struct HealthServiceImpl {
-    pub network: String,
+    pub state: Arc<AppState>,
 }
 
 #[tonic::async_trait]
@@ -32,7 +32,13 @@ impl pb::health_service_server::HealthService for HealthServiceImpl {
     ) -> Result<Response<pb::HealthCheckResponse>, Status> {
         Ok(Response::new(pb::HealthCheckResponse {
             status: "ok".into(),
-            network: self.network.clone(),
+            network: self.state.network.clone(),
+            version: self.state.version.clone(),
+            evm_network: self.state.evm_preset.clone(),
+            uptime_seconds: self.state.started_at.elapsed().as_secs(),
+            build_commit: self.state.build_commit.clone(),
+            payment_token_address: self.state.evm_token_addr.clone(),
+            payment_vault_address: self.state.evm_vault_addr.clone(),
         }))
     }
 }
diff --git a/antd/src/main.rs b/antd/src/main.rs
index df5b788..3808758 100644
--- a/antd/src/main.rs
+++ b/antd/src/main.rs
@@ -211,6 +211,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         "EVM config resolved"
     );
 
+    // Capture preset + addresses for /health diagnostics before evm_cfg is
+    // consumed by the wallet/network setup below.
+    let evm_preset = evm_cfg.preset.clone();
+    let evm_token_addr = evm_cfg.token_addr.clone();
+    let evm_vault_addr = evm_cfg.vault_addr.clone();
+
     // For known mainnet/testnet presets use the typed EvmNetwork variants
     // (ArbitrumOne / ArbitrumSepoliaTest) — they encode the chain-id and
     // pricing constants that mainnet storers' median-quote payment verifier
@@ -269,6 +275,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         network: config.network.clone(),
         bootstrap_peers,
         pending_uploads: Arc::new(tokio::sync::Mutex::new(std::collections::HashMap::new())),
+        started_at: std::time::Instant::now(),
+        version: env!("CARGO_PKG_VERSION").to_string(),
+        build_commit: env!("ANTD_BUILD_COMMIT").to_string(),
+        evm_preset,
+        evm_token_addr,
+        evm_vault_addr,
     });
 
     // Spawn background task to clean up stale pending uploads (1-hour TTL)
diff --git a/antd/src/rest/mod.rs b/antd/src/rest/mod.rs
index 49ce48a..3f111c5 100644
--- a/antd/src/rest/mod.rs
+++ b/antd/src/rest/mod.rs
@@ -123,5 +123,11 @@ async fn health(State(state): State<Arc<AppState>>) -> Json<HealthResponse> {
     Json(HealthResponse {
         status: "ok".into(),
         network: state.network.clone(),
+        version: state.version.clone(),
+        evm_network: state.evm_preset.clone(),
+        uptime_seconds: state.started_at.elapsed().as_secs(),
+        build_commit: state.build_commit.clone(),
+        payment_token_address: state.evm_token_addr.clone(),
+        payment_vault_address: state.evm_vault_addr.clone(),
     })
 }
diff --git a/antd/src/state.rs b/antd/src/state.rs
index 92bd4c2..f969280 100644
--- a/antd/src/state.rs
+++ b/antd/src/state.rs
@@ -22,6 +22,18 @@ pub struct AppState {
     pub bootstrap_peers: Vec<MultiAddr>,
     /// Pending prepared uploads awaiting external payment (upload_id → state).
     pub pending_uploads: Arc<Mutex<HashMap<String, TimestampedUpload>>>,
+    /// Process start time, for /health uptime reporting.
+    pub started_at: std::time::Instant,
+    /// antd crate version (env!("CARGO_PKG_VERSION") at build time).
+    pub version: String,
+    /// Short git SHA captured by build.rs, or "" if unknown.
+    pub build_commit: String,
+    /// EVM preset name ("arbitrum-one", "arbitrum-sepolia", "local", "custom").
+    pub evm_preset: String,
+    /// Payment token contract address, or "" if unconfigured.
+    pub evm_token_addr: String,
+    /// Payment vault contract address, or "" if unconfigured.
+    pub evm_vault_addr: String,
 }
 
 impl AppState {
diff --git a/antd/src/types.rs b/antd/src/types.rs
index 88e83b6..e363bc8 100644
--- a/antd/src/types.rs
+++ b/antd/src/types.rs
@@ -283,6 +283,12 @@ pub struct WalletApproveResponse {
 pub struct HealthResponse {
     pub status: String,
     pub network: String,
+    pub version: String,
+    pub evm_network: String,
+    pub uptime_seconds: u64,
+    pub build_commit: String,
+    pub payment_token_address: String,
+    pub payment_vault_address: String,
 }
 
 // ── Tests ──
@@ -401,4 +407,48 @@ mod tests {
         assert!(req.tx_hashes.is_some());
         assert!(req.tx_hashes.as_ref().unwrap().is_empty());
     }
+
+    #[test]
+    fn health_response_serializes_all_fields() {
+        let resp = HealthResponse {
+            status: "ok".into(),
+            network: "default".into(),
+            version: "0.4.0".into(),
+            evm_network: "arbitrum-one".into(),
+            uptime_seconds: 12345,
+            build_commit: "abcdef123456".into(),
+            payment_token_address: "0xtoken".into(),
+            payment_vault_address: "0xvault".into(),
+        };
+        let json = serde_json::to_value(&resp).unwrap();
+        assert_eq!(json["status"], "ok");
+        assert_eq!(json["network"], "default");
+        assert_eq!(json["version"], "0.4.0");
+        assert_eq!(json["evm_network"], "arbitrum-one");
+        assert_eq!(json["uptime_seconds"], 12345u64);
+        assert_eq!(json["build_commit"], "abcdef123456");
+        assert_eq!(json["payment_token_address"], "0xtoken");
+        assert_eq!(json["payment_vault_address"], "0xvault");
+    }
+
+    #[test]
+    fn health_response_keeps_empty_strings_for_unconfigured_evm() {
+        // Local devnet leaves token + vault empty; build_commit is empty for
+        // non-git source distributions. Empty strings must round-trip rather
+        // than being omitted.
+        let resp = HealthResponse {
+            status: "ok".into(),
+            network: "local".into(),
+            version: "0.4.0".into(),
+            evm_network: "local".into(),
+            uptime_seconds: 0,
+            build_commit: String::new(),
+            payment_token_address: String::new(),
+            payment_vault_address: String::new(),
+        };
+        let json = serde_json::to_value(&resp).unwrap();
+        assert_eq!(json["build_commit"], "");
+        assert_eq!(json["payment_token_address"], "");
+        assert_eq!(json["payment_vault_address"], "");
+    }
 }