From b5df58d3e0165334cdf64d3124232066f75305a7 Mon Sep 17 00:00:00 2001
From: Ben Bachem <10088265+bezbac@users.noreply.github.com>
Date: Wed, 5 Aug 2026 13:11:27 +0200
Subject: [PATCH] Use `LANGFUSE_BASE_URL` over `LANGFUSE_BASEURL`

---
 README.md    | 2 +-
 src/index.ts | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 7aef87d..f15c0ce 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ You can also set credentials with environment variables:
 ```bash
 export LANGFUSE_PUBLIC_KEY="pk-lf-..."
 export LANGFUSE_SECRET_KEY="sk-lf-..."
-export LANGFUSE_BASEURL="https://cloud.langfuse.com"
+export LANGFUSE_BASE_URL="https://cloud.langfuse.com"
 export LANGFUSE_ENVIRONMENT="development"
 export LANGFUSE_USER_ID="your-user-id"
 ```
diff --git a/src/index.ts b/src/index.ts
index d840940..1f57922 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -100,7 +100,8 @@ const loadLangfuseCredentials = Effect.gen(function* () {
     return {
       publicKey,
       secretKey,
-      baseUrl: process.env.LANGFUSE_BASEURL,
+      // Prefer the canonical name while retaining the legacy name for semver compatibility.
+      baseUrl: process.env.LANGFUSE_BASE_URL ?? process.env.LANGFUSE_BASEURL,
       environment: process.env.LANGFUSE_ENVIRONMENT,
       userId: process.env.LANGFUSE_USER_ID,
     } satisfies LangfuseCredentials;
@@ -281,6 +282,8 @@ const main = Effect.gen(function* () {
 
     const baseUrl =
       credentials.baseUrl ??
+      // Prefer the canonical name while retaining the legacy name for semver compatibility.
+      process.env.LANGFUSE_BASE_URL ??
       process.env.LANGFUSE_BASEURL ??
       "https://cloud.langfuse.com";