Langfuse - Mirage

Credentials

1. Get API Keys

Langfuse Cloud

Go to https://cloud.langfuse.com
Select your project -> Settings -> API Keys
Copy the Public Key and Secret Key

Self-hosted

Go to your Langfuse instance (e.g., https://langfuse.yourcompany.com)
Select your project -> Settings -> API Keys
Copy the Public Key and Secret Key

The VFS reads the Langfuse v4 API, so a self-hosted instance must run Langfuse v4.

2. Set Environment Variables

# .env.development
LANGFUSE_PUBLIC_KEY=pk-lf-...
LANGFUSE_SECRET_KEY=sk-lf-...
LANGFUSE_HOST=https://cloud.langfuse.com

For SDK guides, see Langfuse (Python) and Langfuse (TypeScript).