From d4ba315ae264b122e4e17890f996874dec65f8fa Mon Sep 17 00:00:00 2001
From: Andrew Nguonly <andrewnguonly@users.noreply.github.com>
Date: Wed, 18 Sep 2024 15:08:00 -0700
Subject: [PATCH] Add section for LANGCHAIN_TRACING_SAMPLING_RATE to env vars
 page. (#1760)

---
 docs/docs/cloud/reference/env_var.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docs/docs/cloud/reference/env_var.md b/docs/docs/cloud/reference/env_var.md
index 820af41ec..4d6be34e3 100644
--- a/docs/docs/cloud/reference/env_var.md
+++ b/docs/docs/cloud/reference/env_var.md
@@ -2,6 +2,12 @@
 
 The LangGraph Cloud API supports specific environment variables for configuring a deployment.
 
+## `LANGCHAIN_TRACING_SAMPLING_RATE`
+
+Sampling rate for traces sent to LangSmith. Valid values: Any float between `0` and `1`.
+
+See <a href="https://docs.smith.langchain.com/how_to_guides/tracing/sample_traces" target="_blank">LangSmith documentation</a> for more details.
+
 ## `LANGGRAPH_AUTH_TYPE`
 
 Type of authentication for the LangGraph Cloud API deployment. Valid values: `langsmith`, `noop`.