diff --git a/packages/cli/examples/xquik-api.yaml b/packages/cli/examples/xquik-api.yaml
new file mode 100644
index 0000000..17de8bd
--- /dev/null
+++ b/packages/cli/examples/xquik-api.yaml
@@ -0,0 +1,60 @@
+openapi: 3.1.0
+info:
+  title: Xquik API
+  version: 1.0.0
+servers:
+  - url: https://xquik.com
+security:
+  - xApiKey: []
+paths:
+  /api/v1/x/tweets/search:
+    get:
+      summary: Search X posts
+      operationId: searchTweets
+      parameters:
+        - name: q
+          in: query
+          required: true
+          description: Search query
+          schema:
+            type: string
+        - name: limit
+          in: query
+          required: false
+          description: Maximum number of posts to return
+          schema:
+            type: integer
+            minimum: 1
+            maximum: 100
+      responses:
+        "200":
+          description: Search results
+          content:
+            application/json:
+              schema:
+                type: object
+                required:
+                  - data
+                properties:
+                  data:
+                    type: array
+                    items:
+                      type: object
+                      required:
+                        - id
+                        - text
+                      properties:
+                        id:
+                          type: string
+                        text:
+                          type: string
+                        authorUsername:
+                          type: string
+                  nextCursor:
+                    type: string
+components:
+  securitySchemes:
+    xApiKey:
+      type: apiKey
+      in: header
+      name: x-api-key
diff --git a/packages/sdk/src/lib.test.ts b/packages/sdk/src/lib.test.ts
index 47434d1..19b35be 100644
--- a/packages/sdk/src/lib.test.ts
+++ b/packages/sdk/src/lib.test.ts
@@ -5,6 +5,7 @@ import { fileURLToPath } from 'url';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 const SAMPLE_SPEC = path.resolve(__dirname, '../../cli/examples/sample-api.yaml');
+const XQUIK_SPEC = path.resolve(__dirname, '../../cli/examples/xquik-api.yaml');
 
 describe('createTools', () => {
   it('returns a ToolSet with one tool per operation', async () => {
@@ -59,6 +60,22 @@ describe('createTools', () => {
     expect(result.length).toBeLessThanOrEqual(2);
   });
 
+  it('can load an OpenAPI 3.1 spec with API key auth in code mode', async () => {
+    const tools = await createTools({ spec: XQUIK_SPEC, codeMode: true });
+    expect(Object.keys(tools).sort()).toEqual(['execute', 'search']);
+
+    const searchTool = tools['search'];
+    const exec = 'execute' in searchTool ? searchTool.execute : undefined;
+
+    const result = await exec!(
+      { query: 'tweets' },
+      { toolCallId: 'x', messages: [], abortSignal: new AbortController().signal }
+    ) as string;
+
+    expect(result).toContain('searchTweets');
+    expect(result).toContain('Search X posts');
+  });
+
   describe('codeMode', () => {
     it('returns exactly 2 tools when codeMode is true', async () => {
       const tools = await createTools({ spec: SAMPLE_SPEC, codeMode: true });