diff --git a/docs/cli.md b/docs/cli.md
index cc543d08..29304493 100644
--- a/docs/cli.md
+++ b/docs/cli.md
@@ -111,9 +111,6 @@ haiku-rag serve
 
 # stdio transport
 haiku-rag serve --stdio
-
-# SSE transport
-haiku-rag serve --sse
 ```
 
 ## Settings
diff --git a/docs/mcp.md b/docs/mcp.md
index f0bf8c93..ec2d02c9 100644
--- a/docs/mcp.md
+++ b/docs/mcp.md
@@ -19,7 +19,7 @@ The MCP server exposes `haiku.rag` as MCP tools for compatible MCP clients.
 
 ## Starting MCP Server
 
-The MCP server starts automatically with the serve command and supports Streamable HTTP, stdio and SSE transports:
+The MCP server starts automatically with the serve command and supports Streamable HTTP and stdio transports:
 
 ```bash
 # Default streamable HTTP transport
@@ -27,7 +27,4 @@ haiku-rag serve
 
 # stdio transport (for Claude Desktop)
 haiku-rag serve --stdio
-
-# SSE transport
-haiku-rag serve --sse
 ```
diff --git a/docs/server.md b/docs/server.md
index afd8a836..15f862b1 100644
--- a/docs/server.md
+++ b/docs/server.md
@@ -11,7 +11,6 @@ haiku-rag serve
 Transport options:
 - Default - Streamable HTTP transport
 - `--stdio` - Standard input/output transport
-- `--sse` - Server-sent events transport
 
 ## File Monitoring
 
diff --git a/src/haiku/rag/app.py b/src/haiku/rag/app.py
index d0948ea4..c41d6267 100644
--- a/src/haiku/rag/app.py
+++ b/src/haiku/rag/app.py
@@ -289,8 +289,6 @@ class HaikuRAGApp:
             try:
                 if transport == "stdio":
                     await server.run_stdio_async()
-                elif transport == "sse":
-                    await server.run_sse_async()
                 else:
                     await server.run_http_async(transport="streamable-http")
             except KeyboardInterrupt:
diff --git a/src/haiku/rag/cli.py b/src/haiku/rag/cli.py
index c23916c9..4fc5b144 100644
--- a/src/haiku/rag/cli.py
+++ b/src/haiku/rag/cli.py
@@ -356,11 +356,6 @@ def serve(
         "--stdio",
         help="Run MCP server on stdio Transport",
     ),
-    sse: bool = typer.Option(
-        False,
-        "--sse",
-        help="Run MCP server on SSE transport",
-    ),
 ) -> None:
     """Start the MCP server."""
     from haiku.rag.app import HaikuRAGApp
@@ -370,8 +365,6 @@ def serve(
     transport = None
     if stdio:
         transport = "stdio"
-    elif sse:
-        transport = "sse"
 
     asyncio.run(app.serve(transport=transport))
 
diff --git a/tests/test_app.py b/tests/test_app.py
index ec1aaada..5e7f80d1 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -172,7 +172,7 @@ async def test_search_no_results(app: HaikuRAGApp, monkeypatch):
 
 
 @pytest.mark.asyncio
-@pytest.mark.parametrize("transport", ["stdio", "sse", "http", None])
+@pytest.mark.parametrize("transport", ["stdio", "http", None])
 async def test_serve(app: HaikuRAGApp, monkeypatch, transport):
     """Test the serve method with different transports."""
     mock_server = AsyncMock()
@@ -199,8 +199,6 @@ async def test_serve(app: HaikuRAGApp, monkeypatch, transport):
 
     if transport == "stdio":
         mock_server.run_stdio_async.assert_called_once()
-    elif transport == "sse":
-        mock_server.run_sse_async.assert_called_once()
     else:
         mock_server.run_http_async.assert_called_once_with(transport="streamable-http")
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index d025a16b..d4e5a455 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -8,7 +8,7 @@ runner = CliRunner()
 
 
 def test_list_documents():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.list_documents = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -20,7 +20,7 @@ def test_list_documents():
 
 
 def test_add_document_text():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.add_document_from_text = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -34,7 +34,7 @@ def test_add_document_text():
 
 
 def test_add_document_src():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.add_document_from_source = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -46,7 +46,7 @@ def test_add_document_src():
 
 
 def test_get_document():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.get_document = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -58,7 +58,7 @@ def test_get_document():
 
 
 def test_delete_document():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.delete_document = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -70,7 +70,7 @@ def test_delete_document():
 
 
 def test_search():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.search = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -82,7 +82,7 @@ def test_search():
 
 
 def test_serve():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.serve = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -94,7 +94,7 @@ def test_serve():
 
 
 def test_serve_stdio():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.serve = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -105,32 +105,8 @@ def test_serve_stdio():
         mock_app_instance.serve.assert_called_once_with(transport="stdio")
 
 
-def test_serve_sse():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
-        mock_app_instance = MagicMock()
-        mock_app_instance.serve = AsyncMock()
-        mock_app.return_value = mock_app_instance
-
-        result = runner.invoke(cli, ["serve", "--sse"])
-
-        assert result.exit_code == 0
-        mock_app_instance.serve.assert_called_once_with(transport="sse")
-
-
-def test_serve_stdio_and_sse():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
-        mock_app_instance = MagicMock()
-        mock_app_instance.serve = AsyncMock()
-        mock_app.return_value = mock_app_instance
-
-        result = runner.invoke(cli, ["serve", "--stdio", "--sse"])
-
-        assert result.exit_code == 1
-        assert "Error: Cannot use both --stdio and --http options" in result.stdout
-
-
 def test_ask():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.ask = AsyncMock()
         mock_app.return_value = mock_app_instance
@@ -144,7 +120,7 @@ def test_ask():
 
 
 def test_ask_with_cite():
-    with patch("haiku.rag.cli.HaikuRAGApp") as mock_app:
+    with patch("haiku.rag.app.HaikuRAGApp") as mock_app:
         mock_app_instance = MagicMock()
         mock_app_instance.ask = AsyncMock()
         mock_app.return_value = mock_app_instance