diff --git a/tests/sweetistics-client.test.ts b/tests/sweetistics-client.test.ts
index 2a5e6e7..03eb11f 100644
--- a/tests/sweetistics-client.test.ts
+++ b/tests/sweetistics-client.test.ts
@@ -47,4 +47,106 @@ describe('SweetisticsClient', () => {
     expect(result.success).toBe(false);
     expect(result.error).toContain('Unauthorized');
   });
+
+  it('reads a tweet', async () => {
+    const fetchMock = vi.fn().mockResolvedValue({
+      ok: true,
+      status: 200,
+      json: async () => ({
+        success: true,
+        tweet: {
+          id: '1',
+          text: 'hi',
+          author: { username: 'u', name: 'User' },
+        },
+      }),
+    });
+    globalThis.fetch = fetchMock as unknown as typeof fetch;
+
+    const client = new SweetisticsClient({ baseUrl: 'https://api.example.com', apiKey: 'sweet-test' });
+    const result = await client.read('1');
+
+    expect(result.success).toBe(true);
+    expect(result.tweet?.id).toBe('1');
+    expect(fetchMock).toHaveBeenCalledWith('https://api.example.com/api/twitter/tweet/1', expect.any(Object));
+  });
+
+  it('fetches replies', async () => {
+    const fetchMock = vi.fn().mockResolvedValue({
+      ok: true,
+      status: 200,
+      json: async () => ({
+        success: true,
+        tweets: [{ id: '2', text: 'reply', author: { username: 'r', name: 'Reply' } }],
+      }),
+    });
+    globalThis.fetch = fetchMock as unknown as typeof fetch;
+
+    const client = new SweetisticsClient({ baseUrl: 'https://api.example.com', apiKey: 'sweet-test' });
+    const result = await client.replies('1');
+
+    expect(result.success).toBe(true);
+    expect(result.tweets?.[0].id).toBe('2');
+    expect(fetchMock).toHaveBeenCalledWith(
+      'https://api.example.com/api/twitter/tweet/1/replies',
+      expect.any(Object),
+    );
+  });
+
+  it('fetches thread', async () => {
+    const fetchMock = vi.fn().mockResolvedValue({
+      ok: true,
+      status: 200,
+      json: async () => ({
+        success: true,
+        tweets: [{ id: '1', text: 'root', author: { username: 'u', name: 'User' } }],
+      }),
+    });
+    globalThis.fetch = fetchMock as unknown as typeof fetch;
+
+    const client = new SweetisticsClient({ baseUrl: 'https://api.example.com', apiKey: 'sweet-test' });
+    const result = await client.thread('1');
+
+    expect(result.success).toBe(true);
+    expect(result.tweets?.length).toBe(1);
+    expect(fetchMock).toHaveBeenCalledWith(
+      'https://api.example.com/api/twitter/tweet/1/thread',
+      expect.any(Object),
+    );
+  });
+
+  it('searches tweets', async () => {
+    const fetchMock = vi.fn().mockResolvedValue({
+      ok: true,
+      status: 200,
+      json: async () => ({
+        success: true,
+        tweets: [{ id: '3', text: 'needle', author: { username: 'n', name: 'Needle' } }],
+      }),
+    });
+    globalThis.fetch = fetchMock as unknown as typeof fetch;
+
+    const client = new SweetisticsClient({ baseUrl: 'https://api.example.com', apiKey: 'sweet-test' });
+    const result = await client.search('needle', 5);
+
+    expect(result.success).toBe(true);
+    expect(result.tweets?.[0].id).toBe('3');
+    const [url] = fetchMock.mock.calls[0];
+    expect(url).toBe('https://api.example.com/api/twitter/search?q=needle&count=5');
+  });
+
+  it('propagates Sweetistics error message', async () => {
+    const fetchMock = vi.fn().mockResolvedValue({
+      ok: false,
+      status: 500,
+      json: async () => ({ success: false, error: 'boom' }),
+    });
+    globalThis.fetch = fetchMock as unknown as typeof fetch;
+
+    const client = new SweetisticsClient({ baseUrl: 'https://api.example.com', apiKey: 'sweet-test' });
+    const result = await client.read('1');
+
+    expect(result.success).toBe(false);
+    expect(result.error).toBe('boom');
+  });
 });