diff --git a/antd-elixir/lib/antd/client.ex b/antd-elixir/lib/antd/client.ex
index e5e9e74..26e9023 100644
--- a/antd-elixir/lib/antd/client.ex
+++ b/antd-elixir/lib/antd/client.ex
@@ -73,7 +73,17 @@ defmodule Antd.Client do
   def health(%__MODULE__{} = client) do
     case do_json(client, :get, "/health", nil) do
       {:ok, body} ->
-        {:ok, %Antd.HealthStatus{ok: body["status"] == "ok", network: body["network"]}}
+        {:ok,
+         %Antd.HealthStatus{
+           ok: body["status"] == "ok",
+           network: body["network"],
+           version: Map.get(body, "version", ""),
+           evm_network: Map.get(body, "evm_network", ""),
+           uptime_seconds: Map.get(body, "uptime_seconds", 0),
+           build_commit: Map.get(body, "build_commit", ""),
+           payment_token_address: Map.get(body, "payment_token_address", ""),
+           payment_vault_address: Map.get(body, "payment_vault_address", "")
+         }}
 
       {:error, _} = err ->
         err
diff --git a/antd-elixir/lib/antd/grpc_client.ex b/antd-elixir/lib/antd/grpc_client.ex
index edf481d..802614a 100644
--- a/antd-elixir/lib/antd/grpc_client.ex
+++ b/antd-elixir/lib/antd/grpc_client.ex
@@ -92,7 +92,17 @@ defmodule Antd.GrpcClient do
 
     case Antd.V1.HealthService.Stub.check(channel, req) do
       {:ok, resp} ->
-        {:ok, %Antd.HealthStatus{ok: resp.status == "ok", network: resp.network}}
+        {:ok,
+         %Antd.HealthStatus{
+           ok: resp.status == "ok",
+           network: resp.network,
+           version: resp.version,
+           evm_network: resp.evm_network,
+           uptime_seconds: resp.uptime_seconds,
+           build_commit: resp.build_commit,
+           payment_token_address: resp.payment_token_address,
+           payment_vault_address: resp.payment_vault_address
+         }}
 
       {:error, rpc_error} ->
         {:error, translate_error(rpc_error)}
diff --git a/antd-elixir/lib/antd/models.ex b/antd-elixir/lib/antd/models.ex
index 4644ef8..949a920 100644
--- a/antd-elixir/lib/antd/models.ex
+++ b/antd-elixir/lib/antd/models.ex
@@ -1,12 +1,32 @@
 defmodule Antd.HealthStatus do
-  @moduledoc "Result of a health check."
+  @moduledoc """
+  Result of a health check.
+
+  The diagnostic fields (`:version`, `:evm_network`, `:uptime_seconds`,
+  `:build_commit`, `:payment_token_address`, `:payment_vault_address`) were
+  added in antd 0.4.0. They default to `""` / `0` so existing struct
+  constructions and pre-0.4.0 daemon responses both still work.
+  """
 
   @enforce_keys [:ok, :network]
-  defstruct [:ok, :network]
+  defstruct ok: nil,
+            network: nil,
+            version: "",
+            evm_network: "",
+            uptime_seconds: 0,
+            build_commit: "",
+            payment_token_address: "",
+            payment_vault_address: ""
 
   @type t :: %__MODULE__{
           ok: boolean(),
-          network: String.t()
+          network: String.t(),
+          version: String.t(),
+          evm_network: String.t(),
+          uptime_seconds: non_neg_integer(),
+          build_commit: String.t(),
+          payment_token_address: String.t(),
+          payment_vault_address: String.t()
         }
 end
 
diff --git a/antd-elixir/test/antd/client_test.exs b/antd-elixir/test/antd/client_test.exs
index e665e70..09f16bd 100644
--- a/antd-elixir/test/antd/client_test.exs
+++ b/antd-elixir/test/antd/client_test.exs
@@ -11,14 +11,58 @@ defmodule Antd.ClientTest do
   # Health
   # ---------------------------------------------------------------------------
 
-  test "health/1 returns health status", %{bypass: bypass, client: client} do
+  test "health/1 returns health status with all diagnostic fields",
+       %{bypass: bypass, client: client} do
     Bypass.expect_once(bypass, "GET", "/health", fn conn ->
       conn
       |> Plug.Conn.put_resp_content_type("application/json")
-      |> Plug.Conn.resp(200, Jason.encode!(%{status: "ok", network: "local"}))
+      |> Plug.Conn.resp(
+        200,
+        Jason.encode!(%{
+          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"
+        })
+      )
     end)
 
-    assert {:ok, %Antd.HealthStatus{ok: true, network: "local"}} = Antd.Client.health(client)
+    assert {:ok,
+            %Antd.HealthStatus{
+              ok: true,
+              network: "local",
+              version: "0.4.0",
+              evm_network: "local",
+              uptime_seconds: 42,
+              build_commit: "abcdef123456",
+              payment_token_address: "0xtoken",
+              payment_vault_address: "0xvault"
+            }} = Antd.Client.health(client)
+  end
+
+  test "health/1 defaults diagnostic fields when daemon is pre-0.4.0",
+       %{bypass: bypass, client: client} do
+    # Older daemons reply with just status + network; the struct defaults
+    # populate the diagnostic fields with empty / 0 instead of nil.
+    Bypass.expect_once(bypass, "GET", "/health", fn conn ->
+      conn
+      |> Plug.Conn.put_resp_content_type("application/json")
+      |> Plug.Conn.resp(200, Jason.encode!(%{status: "ok", network: "default"}))
+    end)
+
+    assert {:ok,
+            %Antd.HealthStatus{
+              ok: true,
+              network: "default",
+              version: "",
+              evm_network: "",
+              uptime_seconds: 0,
+              build_commit: ""
+            }} = Antd.Client.health(client)
   end
 
   # ---------------------------------------------------------------------------