From f27a6fcd7aaef0471599a9703adccf4e6ef2d5aa Mon Sep 17 00:00:00 2001
From: Lukas Innig <lukas.innig@gmail.com>
Date: Tue, 21 Oct 2025 15:01:50 +0100
Subject: [PATCH] Update environment vars in uvx transport (#2169)

The UvxStdioTransport class is not adding extra environment variables - like e.g. the NpxStdioTransport already does
---
 src/fastmcp/client/transports.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/fastmcp/client/transports.py b/src/fastmcp/client/transports.py
index 2cadd0631..92c88a0de 100644
--- a/src/fastmcp/client/transports.py
+++ b/src/fastmcp/client/transports.py
@@ -748,6 +748,7 @@ class UvxStdioTransport(StdioTransport):
         env: dict[str, str] | None = None
         if env_vars:
             env = os.environ.copy()
+            env.update(env_vars)
 
         super().__init__(
             command="uvx",