From ebeb3b30dfbaaccbc2f2ad17504123e71a1675d9 Mon Sep 17 00:00:00 2001
From: Guro <guro@anthropic.com>
Date: Thu, 23 Jan 2025 15:54:45 -0500
Subject: [PATCH 1/3] add transport type

---
 src/mcp/cli/cli.py | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/src/mcp/cli/cli.py b/src/mcp/cli/cli.py
index 1512e11..284da72 100644
--- a/src/mcp/cli/cli.py
+++ b/src/mcp/cli/cli.py
@@ -6,6 +6,7 @@
 import subprocess
 import sys
 from pathlib import Path
+from enum import Enum
 from typing import Annotated
 
 try:
@@ -36,6 +37,11 @@
 )
 
 
+class Transport(str, Enum):
+    STDIO = "stdio"
+    SSE = "sse"
+
+
 def _get_npx_command():
     """Get the correct npx command for the current platform."""
     if sys.platform == "win32":
@@ -67,6 +73,7 @@ def _build_uv_command(
     file_spec: str,
     with_editable: Path | None = None,
     with_packages: list[str] | None = None,
+    transport: Transport | None = None,
 ) -> list[str]:
     """Build the uv run command that runs a MCP server through mcp run."""
     cmd = ["uv"]
@@ -81,8 +88,12 @@ def _build_uv_command(
             if pkg:
                 cmd.extend(["--with", pkg])
 
-    # Add mcp run command
-    cmd.extend(["mcp", "run", file_spec])
+    # Add mcp run command with optional transport
+    cmd.extend(["mcp", "run"])
+    if transport:
+        cmd.extend(["--transport", transport])
+
+    cmd.append(file_spec)
     return cmd
 
 
@@ -217,6 +228,14 @@ def dev(
             help="Additional packages to install",
         ),
     ] = [],
+    transport: Annotated[
+        Transport | None,
+        typer.Option(
+            "--transport",
+            "-t",
+            help="Transport protocol to use (stdio or sse)",
+        ),
+    ] = None,
 ) -> None:
     """Run a MCP server with the MCP Inspector."""
     file, server_object = _parse_file_path(file_spec)
@@ -237,7 +256,7 @@ def dev(
         if hasattr(server, "dependencies"):
             with_packages = list(set(with_packages + server.dependencies))
 
-        uv_cmd = _build_uv_command(file_spec, with_editable, with_packages)
+        uv_cmd = _build_uv_command(file_spec, with_editable, with_packages, transport)
 
         # Get the correct npx command
         npx_cmd = _get_npx_command()
@@ -284,7 +303,7 @@ def run(
         help="Python file to run, optionally with :object suffix",
     ),
     transport: Annotated[
-        str | None,
+        Transport | None,
         typer.Option(
             "--transport",
             "-t",

From 063ce2c2ce7cd452267b167f79d83add99388f01 Mon Sep 17 00:00:00 2001
From: Guro <guro@anthropic.com>
Date: Thu, 23 Jan 2025 16:53:29 -0500
Subject: [PATCH 2/3] add SSE_HOSTPORT env passing

---
 src/mcp/cli/cli.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/mcp/cli/cli.py b/src/mcp/cli/cli.py
index 284da72..b797828 100644
--- a/src/mcp/cli/cli.py
+++ b/src/mcp/cli/cli.py
@@ -269,11 +269,16 @@ def dev(
 
         # Run the MCP Inspector command with shell=True on Windows
         shell = sys.platform == "win32"
+
+        env = dict(os.environ.items())
+        if transport == Transport.SSE:
+            env["SSE_HOSTPORT"] = "0.0.0.0:8000"
+
         process = subprocess.run(
             [npx_cmd, "@modelcontextprotocol/inspector"] + uv_cmd,
             check=True,
             shell=shell,
-            env=dict(os.environ.items()),  # Convert to list of tuples for env update
+            env=env,
         )
         sys.exit(process.returncode)
     except subprocess.CalledProcessError as e:

From 901ee3b08a8d2118e6f0d6fbb9d7b94f094486be Mon Sep 17 00:00:00 2001
From: Guro <guro@anthropic.com>
Date: Thu, 23 Jan 2025 16:55:23 -0500
Subject: [PATCH 3/3] add missing comment

---
 src/mcp/cli/cli.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mcp/cli/cli.py b/src/mcp/cli/cli.py
index b797828..8e3dbe1 100644
--- a/src/mcp/cli/cli.py
+++ b/src/mcp/cli/cli.py
@@ -270,7 +270,7 @@ def dev(
         # Run the MCP Inspector command with shell=True on Windows
         shell = sys.platform == "win32"
 
-        env = dict(os.environ.items())
+        env = dict(os.environ.items()) # Convert to list of tuples for env update
         if transport == Transport.SSE:
             env["SSE_HOSTPORT"] = "0.0.0.0:8000"