diff --git a/src/tools/servers.ts b/src/tools/servers.ts
index f361fb6..9f444c7 100644
--- a/src/tools/servers.ts
+++ b/src/tools/servers.ts
@@ -34,7 +34,7 @@ function formatServer(server: HetznerServer): string {
     `- **IPv4**: ${ipv4}`,
     `- **IPv6**: ${ipv6}`,
     `- **Type**: ${server.server_type.name} (${server.server_type.cores} cores, ${server.server_type.memory}GB RAM, ${server.server_type.disk}GB disk)`,
-    `- **Location**: ${escapeHtml(server.datacenter.location.city)}, ${escapeHtml(server.datacenter.location.country)} (${escapeHtml(server.datacenter.name)})`
+    `- **Location**: ${escapeHtml(server.location.city)}, ${escapeHtml(server.location.country)} (${escapeHtml(server.location.name)})`
   ];
 
   if (server.image) {
diff --git a/src/types.ts b/src/types.ts
index 7d64074..23be40a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -68,16 +68,18 @@ export const HetznerServerSchema = z.object({
     memory: z.number(),
     disk: z.number()
   }),
-  datacenter: z.object({
-    id: z.number(),
+  // Hetzner removed the `datacenter` property from the Servers API on 2026-06-30
+  // (announced 2025-12-16, "Phasing out Datacenters in favor of Locations").
+  // https://docs.hetzner.cloud/changelog#2025-12-16-phasing-out-datacenters
+  //
+  // Only the fields formatServer() actually renders are declared. z.object already
+  // strips unknown keys, so listing fewer fields is strictly more tolerant of the
+  // next upstream change — a required field we never read is a crash waiting to
+  // happen (that is exactly how the datacenter removal broke every server tool).
+  location: z.object({
     name: z.string(),
-    description: z.string(),
-    location: z.object({
-      id: z.number(),
-      name: z.string(),
-      city: z.string(),
-      country: z.string()
-    })
+    country: z.string(),
+    city: z.string()
   }),
   image: z.object({
     id: z.number(),
diff --git a/tests/tools/metrics.test.ts b/tests/tools/metrics.test.ts
index d087126..9b295ba 100644
--- a/tests/tools/metrics.test.ts
+++ b/tests/tools/metrics.test.ts
@@ -60,12 +60,7 @@ const serverResponse = {
     status: "running",
     public_net: { ipv4: { ip: "91.99.173.93" }, ipv6: { ip: "2a01:4f8::1" } },
     server_type: { id: 22, name: "cx53", description: "CX53", cores: 16, memory: 32, disk: 320 },
-    datacenter: {
-      id: 2,
-      name: "nbg1-dc3",
-      description: "Nuremberg DC Park 1",
-      location: { id: 2, name: "nbg1", city: "Nuremberg", country: "DE" }
-    },
+    location: { id: 2, name: "nbg1", description: "Nuremberg DC Park 1", country: "DE", city: "Nuremberg" },
     image: { id: 1, name: "ubuntu-22.04", description: "Ubuntu 22.04", os_flavor: "ubuntu", os_version: "22.04" },
     labels: {},
     created: "2024-01-01T00:00:00+00:00"
diff --git a/tests/tools/server-ssh.test.ts b/tests/tools/server-ssh.test.ts
index 802647c..4d7616a 100644
--- a/tests/tools/server-ssh.test.ts
+++ b/tests/tools/server-ssh.test.ts
@@ -55,12 +55,7 @@ const serverResponse = {
       ipv6: { ip: "2a01:4f8::1" }
     },
     server_type: { id: 22, name: "cx53", description: "CX53", cores: 16, memory: 32, disk: 320 },
-    datacenter: {
-      id: 2,
-      name: "nbg1-dc3",
-      description: "Nuremberg DC Park 1",
-      location: { id: 2, name: "nbg1", city: "Nuremberg", country: "DE" }
-    },
+    location: { id: 2, name: "nbg1", description: "Nuremberg DC Park 1", country: "DE", city: "Nuremberg" },
     image: { id: 1, name: "ubuntu-22.04", description: "Ubuntu 22.04", os_flavor: "ubuntu", os_version: "22.04" },
     labels: {},
     created: "2024-01-01T00:00:00+00:00"
diff --git a/tests/tools/servers.test.ts b/tests/tools/servers.test.ts
index 4bd2227..6fe9500 100644
--- a/tests/tools/servers.test.ts
+++ b/tests/tools/servers.test.ts
@@ -12,7 +12,7 @@ vi.mock("../../src/api.js", async (importOriginal) => {
 import { registerServerTools } from "../../src/tools/servers.js";
 import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { makeApiRequest } from "../../src/api.js";
-import { HetznerServer, ListServersResponse, ListServersResponseSchema } from "../../src/types.js";
+import { HetznerServer, HetznerServerSchema, ListServersResponse, ListServersResponseSchema } from "../../src/types.js";
 
 const mockedRequest = vi.mocked(makeApiRequest);
 
@@ -29,12 +29,9 @@ const baseServer: HetznerServer = {
     ipv6: { ip: "2001:db8::1" }
   },
   server_type: { id: 1, name: "cx22", description: "CX22", cores: 2, memory: 4, disk: 40 },
-  datacenter: {
-    id: 1,
-    name: "fsn1-dc14",
-    description: "Falkenstein DC Park 1",
-    location: { id: 1, name: "fsn1", city: "Falkenstein", country: "DE" }
-  },
+  // 只保留 schema 宣告的欄位，與 parse 後的實際形狀一致。
+  // 真實 API 多回傳的欄位由下方 rawApiServer 測試涵蓋。
+  location: { name: "fsn1", country: "DE", city: "Falkenstein" },
   image: { id: 1, name: "ubuntu-24.04", description: "Ubuntu 24.04", os_flavor: "ubuntu", os_version: "24.04" },
   labels: {},
   created: "2026-01-01T00:00:00+00:00"
@@ -73,6 +70,40 @@ function captureRegisteredTools(): CapturedTool[] {
   return captured;
 }
 
+describe("hetzner_list_servers — location rendering", () => {
+  // Regression: Hetzner removed `datacenter` from the Servers API on 2026-06-30.
+  // The formatter must read the top-level `location` object instead.
+  it("renders Location from the top-level location object", async () => {
+    const tools = captureRegisteredTools();
+    const handler = tools.find((t) => t.name === "hetzner_list_servers")!.handler;
+    mockedRequest.mockResolvedValueOnce(pageResponse([makeServer(1)], null));
+
+    const result = await handler({ response_format: "markdown" });
+
+    expect(result.isError).toBeUndefined();
+    expect(result.content[0].text).toContain("**Location**: Falkenstein, DE (fsn1)");
+  });
+
+  // The live payload carries no `datacenter` and extra location keys we never render.
+  // Declaring only the consumed fields must tolerate both.
+  it("parses a raw API payload with no datacenter and unknown extra keys", () => {
+    const rawApiServer = {
+      ...baseServer,
+      location: {
+        id: 1,
+        name: "fsn1",
+        description: "Falkenstein DC Park 1",
+        country: "DE",
+        city: "Falkenstein",
+        latitude: 50.47612,
+        longitude: 12.370071,
+        network_zone: "eu-central"
+      }
+    };
+    expect(() => HetznerServerSchema.parse(rawApiServer)).not.toThrow();
+  });
+});
+
 describe("hetzner_list_servers — auto-pagination", () => {
   it("fetches all pages and combines results", async () => {
     const tools = captureRegisteredTools();