diff --git a/.env.example b/.env.example
index 5ca7a41..b17254f 100644
--- a/.env.example
+++ b/.env.example
@@ -6,11 +6,11 @@
 
 # AI Model API Configuration
 OPENAI_API_BASE=https://your-openai-proxy.com/v1
-OPENAI_API_KEY=your_openai_key_here
+OPENAI_API_KEY=your_openai_key_here # https://platform.openai.com/api-keys
 
 # Data Source Configuration
-ALPHAADVANTAGE_API_KEY=your_alphavantage_key_here
-JINA_API_KEY=your_jina_key_here
+ALPHAADVANTAGE_API_KEY=your_alphavantage_key_here  # https://www.alphavantage.co/support/#api-key
+JINA_API_KEY=your_jina_key_here # https://jina.ai/
 
 # System Configuration (Docker default paths)
 RUNTIME_ENV_PATH=/app/data/runtime_env.json