diff --git a/antd-lua/spec/client_spec.lua b/antd-lua/spec/client_spec.lua
index 8b59279..a7c6d14 100644
--- a/antd-lua/spec/client_spec.lua
+++ b/antd-lua/spec/client_spec.lua
@@ -81,7 +81,16 @@ local function setup_daemon()
 
     -- Health
     register_route("GET", "/health", 200,
-        cjson.encode({ status = "ok", network = "local" }))
+        cjson.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",
+        }))
 
     -- Data put public
     register_route("POST", "/v1/data/public", 200,
@@ -164,11 +173,17 @@ describe("antd client", function()
     end)
 
     describe("health", function()
-        it("returns health status", function()
+        it("returns health status with all diagnostic fields", function()
             local h, err = client:health()
             assert.is_nil(err)
             assert.is_true(h.ok)
             assert.are.equal("local", h.network)
+            assert.are.equal("0.4.0", h.version)
+            assert.are.equal("local", h.evm_network)
+            assert.are.equal(42, h.uptime_seconds)
+            assert.are.equal("abcdef123456", h.build_commit)
+            assert.are.equal("0xtoken", h.payment_token_address)
+            assert.are.equal("0xvault", h.payment_vault_address)
         end)
     end)
 
diff --git a/antd-lua/src/antd/client.lua b/antd-lua/src/antd/client.lua
index 09c7efe..7c3b58f 100644
--- a/antd-lua/src/antd/client.lua
+++ b/antd-lua/src/antd/client.lua
@@ -195,7 +195,14 @@ end
 function Client:health()
     local j, _, err = self:_do_json("GET", "/health", nil)
     if err then return nil, err end
-    return models.new_health_status(str(j, "status") == "ok", str(j, "network")), nil
+    return models.new_health_status(str(j, "status") == "ok", str(j, "network"), {
+        version = str(j, "version"),
+        evm_network = str(j, "evm_network"),
+        uptime_seconds = j.uptime_seconds or 0,
+        build_commit = str(j, "build_commit"),
+        payment_token_address = str(j, "payment_token_address"),
+        payment_vault_address = str(j, "payment_vault_address"),
+    }), nil
 end
 
 -- ── Data ──
diff --git a/antd-lua/src/antd/models.lua b/antd-lua/src/antd/models.lua
index e0bccf9..b3c01a7 100644
--- a/antd-lua/src/antd/models.lua
+++ b/antd-lua/src/antd/models.lua
@@ -5,13 +5,28 @@
 local M = {}
 
 --- Create a HealthStatus table.
+--
+-- The diagnostic fields (version, evm_network, uptime_seconds, build_commit,
+-- payment_token_address, payment_vault_address) were added in antd 0.4.0.
+-- The optional opts table populates them; missing keys default to "" / 0 so
+-- the function stays backward-compatible with the original 2-arg call shape.
+--
 -- @param ok boolean daemon is healthy
 -- @param network string network name
+-- @param opts table optional diagnostic fields: { version, evm_network,
+--   uptime_seconds, build_commit, payment_token_address, payment_vault_address }
 -- @return table
-function M.new_health_status(ok, network)
+function M.new_health_status(ok, network, opts)
+    opts = opts or {}
     return {
         ok = ok,
         network = network,
+        version = opts.version or "",
+        evm_network = opts.evm_network or "",
+        uptime_seconds = opts.uptime_seconds or 0,
+        build_commit = opts.build_commit or "",
+        payment_token_address = opts.payment_token_address or "",
+        payment_vault_address = opts.payment_vault_address or "",
     }
 end