# Description: Example of .env file # Usage: Copy this file to .env and change the values # according to your needs # Do not commit .env file to git # Do not change .env.example file # Config directory # Directory where files, logs and database will be stored # Example: LANGFLOW_CONFIG_DIR=~/.langflow LANGFLOW_CONFIG_DIR= # Save database in the config directory # Values: true, false # If false, the database will be saved in Langflow's root directory # This means that the database will be deleted when Langflow is uninstalled # and that the database will not be shared between different virtual environments # Example: LANGFLOW_SAVE_DB_IN_CONFIG_DIR=true LANGFLOW_SAVE_DB_IN_CONFIG_DIR= # Database URL # Postgres example: LANGFLOW_DATABASE_URL=postgresql://postgres:postgres@localhost:5432/langflow # pragma: allowlist secret # SQLite example: LANGFLOW_DATABASE_URL=sqlite:///./langflow.db # Alembic logs path flag. If set to true, Alembic will log to stdout. LANGFLOW_ALEMBIC_LOG_TO_STDOUT=False # mem0 creates a directory # for chat history, vector stores, and other artifacts # its default path is ~/.mem0. # we can change this path with # environment variable "MEM0_DIR" # Example: MEM0_DIR=/tmp/.mem0 # composio creates a cache directory # for file uploads/downloads. # its default path is ~/.composio # we can change this path with # environment variable "COMPOSIO_CACHE_DIR" # Example: COMPOSIO_CACHE_DIR=/tmp/.composio # Database connection retry # Values: true, false # If true, the database will retry to connect to the database if it fails # Example: LANGFLOW_DATABASE_CONNECTION_RETRY=true LANGFLOW_DATABASE_CONNECTION_RETRY=false # Cache type LANGFLOW_LANGCHAIN_CACHE=SQLiteCache # Server host # Example: LANGFLOW_HOST=localhost LANGFLOW_HOST= # Worker processes # Example: LANGFLOW_WORKERS=1 LANGFLOW_WORKERS= # Server port # Example: LANGFLOW_PORT=7860 LANGFLOW_PORT= # Logging level # Example: LANGFLOW_LOG_LEVEL=critical LANGFLOW_LOG_LEVEL= # Path to the log file # Example: LANGFLOW_LOG_FILE=logs/langflow.log LANGFLOW_LOG_FILE= # Time/Size for log to rotate # Example: LANGFLOW_LOG_ROTATION=‘10 MB’/‘1 day’ LANGFLOW_LOG_ROTATION= # Path to the frontend directory containing build files # Example: LANGFLOW_FRONTEND_PATH=/path/to/frontend/build/files LANGFLOW_FRONTEND_PATH= # Whether to open the browser after starting the server # Values: true, false # Example: LANGFLOW_OPEN_BROWSER=true LANGFLOW_OPEN_BROWSER= # Whether to remove API keys from the projects saved in the database # Values: true, false # Example: LANGFLOW_REMOVE_API_KEYS=false LANGFLOW_REMOVE_API_KEYS= # Whether to use RedisCache or ThreadingInMemoryCache or AsyncInMemoryCache # Values: async, memory, redis # Example: LANGFLOW_CACHE_TYPE=memory # If you want to use redis then the following environment variables must be set: # LANGFLOW_REDIS_HOST (default: localhost) # LANGFLOW_REDIS_PORT (default: 6379) # LANGFLOW_REDIS_DB (default: 0) # LANGFLOW_REDIS_CACHE_EXPIRE (default: 3600) LANGFLOW_CACHE_TYPE= # Set LANGFLOW_AUTO_LOGIN to false if you want to disable auto login # and use the login form to login. LANGFLOW_SUPERUSER and LANGFLOW_SUPERUSER_PASSWORD # must be set if AUTO_LOGIN is set to false # Values: true, false LANGFLOW_AUTO_LOGIN= # SET LANGFLOW_ENABLE_SUPERUSER_CLI to false to disable # superuser creation via the CLI LANGFLOW_ENABLE_SUPERUSER_CLI= # Superuser username # Example: LANGFLOW_SUPERUSER=admin LANGFLOW_SUPERUSER= # Superuser password # Example: LANGFLOW_SUPERUSER_PASSWORD=123456 LANGFLOW_SUPERUSER_PASSWORD= # API Key Source # Controls how API keys are validated for the x-api-key header # Values: db, env # - db (default): Validates against API keys stored in the database # - env: Validates against the LANGFLOW_API_KEY environment variable # Example: LANGFLOW_API_KEY_SOURCE=db LANGFLOW_API_KEY_SOURCE= # API Key (only used when LANGFLOW_API_KEY_SOURCE=env) # The API key to use for authentication when API_KEY_SOURCE is set to 'env' # This allows injecting a pre-defined API key via environment variables # (useful for Kubernetes Secrets, CI/CD pipelines, etc.) # Example: LANGFLOW_API_KEY=your-secure-api-key LANGFLOW_API_KEY= # Rate Limiting Configuration # Controls rate limiting for login endpoint to prevent brute force attacks # LANGFLOW_RATE_LIMIT_PER_MINUTE: Number of login attempts allowed per minute per IP # Values: positive integer (default: 5) # Example: LANGFLOW_RATE_LIMIT_PER_MINUTE=10 LANGFLOW_RATE_LIMIT_PER_MINUTE= # LANGFLOW_RATE_LIMIT_STORAGE_URI: Storage backend for rate limit counters # Values: memory:// (default, single server) or redis://host:port (production, multiple servers) # - memory://: Fast, in-memory storage (not shared between server instances, lost on restart) # - redis://localhost:6379: Persistent, shared storage (required for load-balanced deployments) # Example: LANGFLOW_RATE_LIMIT_STORAGE_URI=redis://localhost:6379 LANGFLOW_RATE_LIMIT_STORAGE_URI= # LANGFLOW_RATE_LIMIT_TRUST_PROXY: Trust X-Forwarded-For header for client IP # Values: true, false (default: false) # When true, uses rightmost X-Forwarded-For IP (the trusted proxy before us) # When false, uses direct connection IP (prevents header spoofing in non-proxy deployments) # # SECURITY WARNING: Only enable if behind a trusted proxy (nginx, load balancer, etc.) # This setting controls BOTH the application rate limiter AND uvicorn's proxy header processing. # When false (default), uvicorn will NOT trust X-Forwarded-For headers, preventing IP spoofing. # When true, uvicorn trusts ALL proxy headers - ensure your proxy is properly configured to # prevent client-supplied X-Forwarded-For values from reaching Langflow. # # Example: LANGFLOW_RATE_LIMIT_TRUST_PROXY=true LANGFLOW_RATE_LIMIT_TRUST_PROXY= # Should store environment variables in the database # Values: true, false LANGFLOW_STORE_ENVIRONMENT_VARIABLES= # SSRF (Server-Side Request Forgery) Protection # When enabled, blocks requests to private IP ranges, localhost, and cloud metadata endpoints # Values: true, false # Default: false (for backward compatibility) # Set to true to enable protection against SSRF attacks LANGFLOW_SSRF_PROTECTION_ENABLED= # SSRF Allowed Hosts # Comma-separated list of hosts/IPs/CIDR ranges to allow despite SSRF protection # Supports: exact hostnames, wildcard domains (*.example.com), exact IPs, CIDR ranges # Example: LANGFLOW_SSRF_ALLOWED_HOSTS=internal-api.company.local,192.168.1.0/24,*.dev.internal # Note: Only takes effect when LANGFLOW_SSRF_PROTECTION_ENABLED=true LANGFLOW_SSRF_ALLOWED_HOSTS= # Should enable the MCP composer feature in MCP projects # Values: true, false # Default: true LANGFLOW_MCP_COMPOSER_ENABLED= # STORE_URL # Example: LANGFLOW_STORE_URL=https://api.langflow.store # LANGFLOW_STORE_URL= # DOWNLOAD_WEBHOOK_URL # # LANGFLOW_DOWNLOAD_WEBHOOK_URL= # LIKE_WEBHOOK_URL # # LANGFLOW_LIKE_WEBHOOK_URL= # Value must finish with slash / #BACKEND_URL=http://localhost:7860/ BACKEND_URL=