diff --git a/.devx/1-build-an-agent/secrets.md b/.devx/1-build-an-agent/secrets.md
index 81f9cd2..20492e2 100644
--- a/.devx/1-build-an-agent/secrets.md
+++ b/.devx/1-build-an-agent/secrets.md
@@ -58,6 +58,24 @@ Manage your API Keys from the [LangSmith Settings](https://smith.langchain.com/s
+
+⚠️ Outside the US?
+
+LangSmith has regional endpoints. Edit `variables.env` and set both `LANGSMITH_ENDPOINT` and `LANGCHAIN_ENDPOINT` to the endpoint for your region:
+
+- **GCP US (default):** `https://api.smith.langchain.com`
+- **GCP EU:** `https://eu.api.smith.langchain.com`
+- **GCP APAC:** `https://apac.api.smith.langchain.com`
+- **AWS US:** `https://aws.api.smith.langchain.com`
+
+After editing, reload the file in your terminal before starting the agent:
+
+```bash
+source /project/variables.env
+```
+
+
+
---
Once your secrets are configured, continue to [Why Agents?](why_agents.md) to learn about the problem agents solve and when to use them.
diff --git a/.devx/2-agentic-rag/running.md b/.devx/2-agentic-rag/running.md
index 05553e9..359053d 100644
--- a/.devx/2-agentic-rag/running.md
+++ b/.devx/2-agentic-rag/running.md
@@ -18,6 +18,12 @@ While other frameworks may provide different ways to deploy agents, the core ide
To get started, start a new here in Jupyter.
+Load your environment variables (re-run this any time you edit `variables.env`):
+
+```bash
+source /project/variables.env
+```
+
Change to the `code/2-agentic-rag` directory:
```bash
diff --git a/.devx/2-agentic-rag/secrets.md b/.devx/2-agentic-rag/secrets.md
index 42a57c5..765d9a9 100644
--- a/.devx/2-agentic-rag/secrets.md
+++ b/.devx/2-agentic-rag/secrets.md
@@ -58,6 +58,24 @@ Manage your API Keys from the [LangSmith Settings](https://smith.langchain.com/s
+
+⚠️ Outside the US?
+
+LangSmith has regional endpoints. Edit `variables.env` and set both `LANGSMITH_ENDPOINT` and `LANGCHAIN_ENDPOINT` to the endpoint for your region:
+
+- **GCP US (default):** `https://api.smith.langchain.com`
+- **GCP EU:** `https://eu.api.smith.langchain.com`
+- **GCP APAC:** `https://apac.api.smith.langchain.com`
+- **AWS US:** `https://aws.api.smith.langchain.com`
+
+After editing, reload the file in your terminal before starting the agent:
+
+```bash
+source /project/variables.env
+```
+
+
+
---
Once you're ready, continue to the [Introduction to RAG](intro.md) section to get started with agentic RAG.
diff --git a/.devx/3-agent-evaluation/secrets.md b/.devx/3-agent-evaluation/secrets.md
index 0d9f3a0..72a3063 100644
--- a/.devx/3-agent-evaluation/secrets.md
+++ b/.devx/3-agent-evaluation/secrets.md
@@ -60,6 +60,22 @@ Manage your API Keys from the [LangSmith Settings](https://smith.langchain.com/s
+
+⚠️ Outside the US?
+
+LangSmith has regional endpoints. Edit `variables.env` and set both `LANGSMITH_ENDPOINT` and `LANGCHAIN_ENDPOINT` to the endpoint for your region:
+
+- **GCP US (default):** `https://api.smith.langchain.com`
+- **GCP EU:** `https://eu.api.smith.langchain.com`
+- **GCP APAC:** `https://apac.api.smith.langchain.com`
+- **AWS US:** `https://aws.api.smith.langchain.com`
+
+After editing, reload the file in your terminal before starting the agent:
+
+```bash
+source /project/variables.env
+```
+
## Ready to Evaluate!
diff --git a/.devx/4-agent-customization/secrets.md b/.devx/4-agent-customization/secrets.md
index 1d28196..5e0bf80 100644
--- a/.devx/4-agent-customization/secrets.md
+++ b/.devx/4-agent-customization/secrets.md
@@ -65,6 +65,22 @@ Manage your API Keys from the [LangSmith Settings](https://smith.langchain.com/s
+
+⚠️ Outside the US?
+
+LangSmith has regional endpoints. Edit `variables.env` and set both `LANGSMITH_ENDPOINT` and `LANGCHAIN_ENDPOINT` to the endpoint for your region:
+
+- **GCP US (default):** `https://api.smith.langchain.com`
+- **GCP EU:** `https://eu.api.smith.langchain.com`
+- **GCP APAC:** `https://apac.api.smith.langchain.com`
+- **AWS US:** `https://aws.api.smith.langchain.com`
+
+After editing, reload the file in your terminal before starting the agent:
+
+```bash
+source /project/variables.env
+```
+
## Ready to Customize!
diff --git a/.devx/5-deep-agents/secrets.md b/.devx/5-deep-agents/secrets.md
index 9acd20e..a1789a8 100644
--- a/.devx/5-deep-agents/secrets.md
+++ b/.devx/5-deep-agents/secrets.md
@@ -64,6 +64,22 @@ Manage your API Keys from the [LangSmith Settings](https://smith.langchain.com/s
+
+⚠️ Outside the US?
+
+LangSmith has regional endpoints. Edit `variables.env` and set both `LANGSMITH_ENDPOINT` and `LANGCHAIN_ENDPOINT` to the endpoint for your region:
+
+- **GCP US (default):** `https://api.smith.langchain.com`
+- **GCP EU:** `https://eu.api.smith.langchain.com`
+- **GCP APAC:** `https://apac.api.smith.langchain.com`
+- **AWS US:** `https://aws.api.smith.langchain.com`
+
+After editing, reload the file in your terminal before starting the agent:
+
+```bash
+source /project/variables.env
+```
+
## Ready to Go!
diff --git a/variables.env b/variables.env
index 5322422..79760d5 100644
--- a/variables.env
+++ b/variables.env
@@ -1,4 +1,11 @@
SHELL=/bin/bash
LANGSMITH_TRACING=true
+# Set the endpoint for your region:
+# GCP US (default): https://api.smith.langchain.com
+# GCP EU: https://eu.api.smith.langchain.com
+# GCP APAC: https://apac.api.smith.langchain.com
+# AWS US: https://aws.api.smith.langchain.com
LANGSMITH_ENDPOINT=https://api.smith.langchain.com
+# LANGCHAIN_ENDPOINT mirrors LANGSMITH_ENDPOINT for older langsmith client versions
+LANGCHAIN_ENDPOINT=https://api.smith.langchain.com
LANGSMITH_PROJECT=nv-devx