From 4f4d06ffdb3ab57b57f32a7b1792b0e49ec26f9b Mon Sep 17 00:00:00 2001
From: Jeremiah Lowin <153965+jlowin@users.noreply.github.com>
Date: Wed, 9 Jul 2025 09:35:26 -0400
Subject: [PATCH] Ensure the CLI accepts "streamable-http" as a valid transport
 (#1099)

* Ensure the CLI accepts "streamable-http" as a valid transport

* Add test for transport aliases
---
 src/fastmcp/cli/cli.py |  2 +-
 src/fastmcp/cli/run.py |  2 +-
 tests/cli/test_cli.py  | 26 ++++++++++++++++++++++++++
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/fastmcp/cli/cli.py b/src/fastmcp/cli/cli.py
index fb99960fe..a7ecf771f 100644
--- a/src/fastmcp/cli/cli.py
+++ b/src/fastmcp/cli/cli.py
@@ -246,7 +246,7 @@ def run(
     server_spec: str,
     *,
     transport: Annotated[
-        Literal["stdio", "http", "sse"] | None,
+        run_module.TransportType | None,
         cyclopts.Parameter(
             name=["--transport", "-t"],
             help="Transport protocol to use",
diff --git a/src/fastmcp/cli/run.py b/src/fastmcp/cli/run.py
index df8e9d757..373d9cfbb 100644
--- a/src/fastmcp/cli/run.py
+++ b/src/fastmcp/cli/run.py
@@ -11,7 +11,7 @@ from fastmcp.utilities.logging import get_logger
 logger = get_logger("cli.run")
 
 # Type aliases for better type safety
-TransportType = Literal["stdio", "http", "sse"]
+TransportType = Literal["stdio", "http", "sse", "streamable-http"]
 LogLevelType = Literal["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"]
 
 
diff --git a/tests/cli/test_cli.py b/tests/cli/test_cli.py
index b546e01d9..097c7b17e 100644
--- a/tests/cli/test_cli.py
+++ b/tests/cli/test_cli.py
@@ -236,6 +236,32 @@ class TestRunCommand:
         assert "log_level" not in bound.arguments
         assert "path" not in bound.arguments
 
+    def test_run_command_transport_aliases(self):
+        """Test that both 'http' and 'streamable-http' are accepted as valid transport options."""
+        # Test with 'http' transport
+        command, bound, _ = app.parse_args(
+            [
+                "run",
+                "server.py",
+                "--transport",
+                "http",
+            ]
+        )
+        assert command is not None
+        assert bound.arguments["transport"] == "http"
+
+        # Test with 'streamable-http' transport
+        command, bound, _ = app.parse_args(
+            [
+                "run",
+                "server.py",
+                "--transport",
+                "streamable-http",
+            ]
+        )
+        assert command is not None
+        assert bound.arguments["transport"] == "streamable-http"
+
 
 class TestWindowsSpecific:
     """Test Windows-specific functionality."""