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+ diff --git a/api/read-projects.html b/api/read-projects.html index 935cf15dd5..c505a89291 100644 --- a/api/read-projects.html +++ b/api/read-projects.html @@ -21,7 +21,7 @@ - + diff --git a/api/read-public-flow.html b/api/read-public-flow.html index 95f651779e..990a97240e 100644 --- a/api/read-public-flow.html +++ b/api/read-public-flow.html @@ -21,7 +21,7 @@ - + diff --git a/api/read-variables.html b/api/read-variables.html index 76435a143f..d82c7e3e91 100644 --- a/api/read-variables.html +++ b/api/read-variables.html @@ -21,7 +21,7 @@ - + diff --git a/api/refresh-token.html b/api/refresh-token.html index 961f3b0689..304cf5b02c 100644 --- a/api/refresh-token.html +++ b/api/refresh-token.html @@ -21,7 +21,7 @@ - + diff --git a/api/reset-password.html b/api/reset-password.html index 792fdcb3d9..f19e88ffe6 100644 --- a/api/reset-password.html +++ b/api/reset-password.html @@ -21,7 +21,7 @@ - + diff --git a/api/retrieve-vertices-order.html b/api/retrieve-vertices-order.html index 4afa052761..47f29aa1ca 100644 --- a/api/retrieve-vertices-order.html +++ b/api/retrieve-vertices-order.html @@ -21,7 +21,7 @@ - + diff --git a/api/save-store-api-key.html b/api/save-store-api-key.html index 5b03f32dcc..63d02478e0 100644 --- a/api/save-store-api-key.html +++ b/api/save-store-api-key.html @@ -21,7 +21,7 @@ - + diff --git a/api/share-component.html b/api/share-component.html index e7ed351f96..e569738a8d 100644 --- a/api/share-component.html +++ b/api/share-component.html @@ -21,7 +21,7 @@ - + diff --git a/api/simplified-run-flow.html b/api/simplified-run-flow.html index fc88427e2c..2fe525116c 100644 --- a/api/simplified-run-flow.html +++ b/api/simplified-run-flow.html @@ -21,7 +21,7 @@ - + diff --git a/api/stream-logs.html b/api/stream-logs.html index 31b60f67a5..5e9d30537c 100644 --- a/api/stream-logs.html +++ b/api/stream-logs.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-flow.html b/api/update-flow.html index bf2eed3b69..b1a44488c8 100644 --- a/api/update-flow.html +++ b/api/update-flow.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-folder-redirect.html b/api/update-folder-redirect.html index 7bb581bcc9..98998c73ac 100644 --- a/api/update-folder-redirect.html +++ b/api/update-folder-redirect.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-message.html b/api/update-message.html index ca9c63397e..e173ee4103 100644 --- a/api/update-message.html +++ b/api/update-message.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-project-mcp-settings.html b/api/update-project-mcp-settings.html index e212f3cda6..7f0d2d8670 100644 --- a/api/update-project-mcp-settings.html +++ b/api/update-project-mcp-settings.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-project.html b/api/update-project.html index 9f84970c32..2eaaa9b2e5 100644 --- a/api/update-project.html +++ b/api/update-project.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-session-id.html b/api/update-session-id.html index 2dda4f3894..1acf4a9ca4 100644 --- a/api/update-session-id.html +++ b/api/update-session-id.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-shared-component.html b/api/update-shared-component.html index 64b0f0419a..2a2786bc1a 100644 --- a/api/update-shared-component.html +++ b/api/update-shared-component.html @@ -21,7 +21,7 @@ - + diff --git a/api/update-variable.html b/api/update-variable.html index 992930758b..efa5f67e91 100644 --- a/api/update-variable.html +++ b/api/update-variable.html @@ -21,7 +21,7 @@ - + diff --git a/api/upload-file-1.html b/api/upload-file-1.html index 94d646ebfb..7892f050cd 100644 --- a/api/upload-file-1.html +++ b/api/upload-file-1.html @@ -21,7 +21,7 @@ - + diff --git a/api/upload-file-2.html b/api/upload-file-2.html index 410358112d..4c7e7ac12b 100644 --- a/api/upload-file-2.html +++ b/api/upload-file-2.html @@ -21,7 +21,7 @@ - + diff --git a/api/upload-file-redirect.html b/api/upload-file-redirect.html index 67074c946c..010c4b3f95 100644 --- a/api/upload-file-redirect.html +++ b/api/upload-file-redirect.html @@ -21,7 +21,7 @@ - + diff --git a/api/upload-file.html b/api/upload-file.html index 1c0d54e8ac..94ed5c7f38 100644 --- a/api/upload-file.html +++ b/api/upload-file.html @@ -21,7 +21,7 @@ - + diff --git a/api/upload-user-file-1.html b/api/upload-user-file-1.html index f7a2a17647..383bfa5add 100644 --- a/api/upload-user-file-1.html +++ b/api/upload-user-file-1.html @@ -21,7 +21,7 @@ - + diff --git a/api/upload-user-file.html b/api/upload-user-file.html index 7abe0247cd..98b49b79a7 100644 --- a/api/upload-user-file.html +++ b/api/upload-user-file.html @@ -21,7 +21,7 @@ - + diff --git a/api/webhook-run-flow.html b/api/webhook-run-flow.html index 8ec3b89e22..a9bd5a8729 100644 --- a/api/webhook-run-flow.html +++ b/api/webhook-run-flow.html @@ -21,7 +21,7 @@ - + diff --git a/assets/js/2ab0d4f5.215419ed.js b/assets/js/2ab0d4f5.82b3b12f.js similarity index 50% rename from assets/js/2ab0d4f5.215419ed.js rename to assets/js/2ab0d4f5.82b3b12f.js index 9e8690fa2a..f2ff5ce669 100644 --- a/assets/js/2ab0d4f5.215419ed.js +++ b/assets/js/2ab0d4f5.82b3b12f.js @@ -1 +1 @@ -"use strict";(self.webpackChunklangflow_docs=self.webpackChunklangflow_docs||[]).push([[1845],{28453:(e,n,t)=>{t.d(n,{R:()=>a,x:()=>o});var i=t(96540);const s={},r=i.createContext(s);function a(e){const n=i.useContext(r);return i.useMemo((function(){return"function"==typeof e?e(n):{...n,...e}}),[n,e])}function o(e){let n;return n=e.disableParentContext?"function"==typeof e.components?e.components(s):e.components||s:a(e.components),i.createElement(r.Provider,{value:n},e.children)}},83640:(e,n,t)=>{t.r(n),t.d(n,{contentTitle:()=>o,default:()=>c,frontMatter:()=>a,metadata:()=>i,toc:()=>l});const i=JSON.parse('{"type":"api","id":"simplified-run-flow","title":"Simplified Run Flow","description":"","slug":"/simplified-run-flow","frontMatter":{},"api":{"tags":["Base"],"description":"Executes a specified flow by ID with support for streaming and telemetry.\\n\\nThis endpoint executes a flow identified by ID or name, with options for streaming the response\\nand tracking execution metrics. It handles both streaming and non-streaming execution modes.\\n\\nArgs:\\n background_tasks (BackgroundTasks): FastAPI background task manager\\n flow (FlowRead | None): The flow to execute, loaded via dependency\\n input_request (SimplifiedAPIRequest | None): Input parameters for the flow\\n stream (bool): Whether to stream the response\\n api_key_user (UserRead): Authenticated user from API key\\n request (Request): The incoming HTTP request\\n\\nReturns:\\n Union[StreamingResponse, RunResponse]: Either a streaming response for real-time results\\n or a RunResponse with the complete execution results\\n\\nRaises:\\n HTTPException: For flow not found (404) or invalid input (400)\\n APIException: For internal execution errors (500)\\n\\nNotes:\\n - Supports both streaming and non-streaming execution modes\\n - Tracks execution time and success/failure via telemetry\\n - Handles graceful client disconnection in streaming mode\\n - Provides detailed error handling with appropriate HTTP status codes\\n - In streaming mode, uses EventManager to handle events:\\n - \\"add_message\\": New messages during execution\\n - \\"token\\": Individual tokens during streaming\\n - \\"end\\": Final execution result","operationId":"simplified_run_flow_api_v1_run__flow_id_or_name__post","security":[{"API key query":[]},{"API key header":[]}],"parameters":[{"name":"flow_id_or_name","in":"path","required":true,"schema":{"type":"string","title":"Flow Id Or Name"}},{"name":"stream","in":"query","required":false,"schema":{"type":"boolean","default":false,"title":"Stream"}},{"name":"user_id","in":"query","required":false,"schema":{"anyOf":[{"type":"string"},{"type":"string","format":"uuid"},{"type":"null"}],"title":"User Id"}}],"requestBody":{"content":{"application/json":{"schema":{"anyOf":[{"properties":{"input_value":{"anyOf":[{"type":"string"},{"type":"null"}],"title":"Input Value","description":"The input value"},"input_type":{"anyOf":[{"type":"string","enum":["chat","text","any"]},{"type":"null"}],"title":"Input Type","description":"The input type","default":"chat"},"output_type":{"anyOf":[{"type":"string","enum":["chat","text","any","debug"]},{"type":"null"}],"title":"Output Type","description":"The output type","default":"chat"},"output_component":{"anyOf":[{"type":"string"},{"type":"null"}],"title":"Output Component","description":"If there are multiple output components, you can specify the component to get the output from.","default":""},"tweaks":{"anyOf":[{"additionalProperties":{"anyOf":[{"type":"string"},{"type":"object"}]},"type":"object","title":"Tweaks","description":"A dictionary of tweaks to adjust the flow\'s execution. Allows customizing flow behavior dynamically. All tweaks are overridden by the input values.","examples":[{"Component Name":{"parameter_name":"value"},"component_id":{"parameter_name":"value"},"parameter_name":"value"}]},{"type":"null"}],"description":"The tweaks"},"session_id":{"anyOf":[{"type":"string"},{"type":"null"}],"title":"Session Id","description":"The session id"}},"type":"object","title":"SimplifiedAPIRequest"},{"type":"null"}],"title":"Input Request"}}}},"responses":{"200":{"description":"Successful Response","content":{"application/json":{"schema":{}}}},"422":{"description":"Validation Error","content":{"application/json":{"schema":{"properties":{"detail":{"items":{"properties":{"loc":{"items":{"anyOf":[{"type":"string"},{"type":"integer"}]},"type":"array","title":"Location"},"msg":{"type":"string","title":"Message"},"type":{"type":"string","title":"Error Type"}},"type":"object","required":["loc","msg","type"],"title":"ValidationError"},"type":"array","title":"Detail"}},"type":"object","title":"HTTPValidationError"}}}}},"method":"post","path":"/api/v1/run/{flow_id_or_name}","securitySchemes":{"OAuth2PasswordBearer":{"type":"oauth2","flows":{"password":{"scopes":{},"tokenUrl":"api/v1/login"}}},"API key query":{"type":"apiKey","in":"query","name":"x-api-key"},"API key header":{"type":"apiKey","in":"header","name":"x-api-key"}},"info":{"title":"Langflow","version":"1.4.2"},"postman":{"name":"Simplified Run Flow","description":{"content":"Executes a specified flow by ID with support for streaming and telemetry.\\n\\nThis endpoint executes a flow identified by ID or name, with options for streaming the response\\nand tracking execution metrics. It handles both streaming and non-streaming execution modes.\\n\\nArgs:\\n background_tasks (BackgroundTasks): FastAPI background task manager\\n flow (FlowRead | None): The flow to execute, loaded via dependency\\n input_request (SimplifiedAPIRequest | None): Input parameters for the flow\\n stream (bool): Whether to stream the response\\n api_key_user (UserRead): Authenticated user from API key\\n request (Request): The incoming HTTP request\\n\\nReturns:\\n Union[StreamingResponse, RunResponse]: Either a streaming response for real-time results\\n or a RunResponse with the complete execution results\\n\\nRaises:\\n HTTPException: For flow not found (404) or invalid input (400)\\n APIException: For internal execution errors (500)\\n\\nNotes:\\n - Supports both streaming and non-streaming execution modes\\n - Tracks execution time and success/failure via telemetry\\n - Handles graceful client disconnection in streaming mode\\n - Provides detailed error handling with appropriate HTTP status codes\\n - In streaming mode, uses EventManager to handle events:\\n - \\"add_message\\": New messages during execution\\n - \\"token\\": Individual tokens during streaming\\n - \\"end\\": Final execution result","type":"text/plain"},"url":{"path":["api","v1","run",":flow_id_or_name"],"host":["{{baseUrl}}"],"query":[{"disabled":false,"key":"stream","value":"false"},{"disabled":false,"key":"user_id","value":"Add your environment variables to the file:
-
_28DO_NOT_TRACK=true_28LANGFLOW_AUTO_LOGIN=false_28LANGFLOW_AUTO_SAVING=true_28LANGFLOW_AUTO_SAVING_INTERVAL=1000_28LANGFLOW_BACKEND_ONLY=false_28LANGFLOW_BUNDLE_URLS=["https://github.com/user/repo/commit/hash"]_28LANGFLOW_CACHE_TYPE=async_28LANGFLOW_COMPONENTS_PATH=/path/to/components/_28LANGFLOW_CONFIG_DIR=/path/to/config/_28LANGFLOW_DATABASE_URL=postgresql://user:password@localhost:5432/langflow_28LANGFLOW_DEV=false_28LANGFLOW_FALLBACK_TO_ENV_VAR=false_28LANGFLOW_HEALTH_CHECK_MAX_RETRIES=5_28LANGFLOW_HOST=localhost_28LANGFLOW_LANGCHAIN_CACHE=InMemoryCache_28LANGFLOW_MAX_FILE_SIZE_UPLOAD=10000_28LANGFLOW_LOG_LEVEL=error_28LANGFLOW_OPEN_BROWSER=false_28LANGFLOW_PORT=7860_28LANGFLOW_REMOVE_API_KEYS=false_28LANGFLOW_SAVE_DB_IN_CONFIG_DIR=true_28LANGFLOW_SECRET_KEY=somesecretkey_28LANGFLOW_STORE=true_28LANGFLOW_STORE_ENVIRONMENT_VARIABLES=true_28LANGFLOW_SUPERUSER=adminuser_28LANGFLOW_SUPERUSER_PASSWORD=adminpass_28LANGFLOW_WORKER_TIMEOUT=60000_28LANGFLOW_WORKERS=3
_30DO_NOT_TRACK=true_30LANGFLOW_AUTO_LOGIN=false_30LANGFLOW_AUTO_SAVING=true_30LANGFLOW_AUTO_SAVING_INTERVAL=1000_30LANGFLOW_BACKEND_ONLY=false_30LANGFLOW_BUNDLE_URLS=["https://github.com/user/repo/commit/hash"]_30LANGFLOW_CACHE_TYPE=async_30LANGFLOW_COMPONENTS_PATH=/path/to/components/_30LANGFLOW_CONFIG_DIR=/path/to/config/_30LANGFLOW_DATABASE_URL=postgresql://user:password@localhost:5432/langflow_30LANGFLOW_DEV=false_30LANGFLOW_FALLBACK_TO_ENV_VAR=false_30LANGFLOW_HEALTH_CHECK_MAX_RETRIES=5_30LANGFLOW_HOST=localhost_30LANGFLOW_LANGCHAIN_CACHE=InMemoryCache_30LANGFLOW_MAX_FILE_SIZE_UPLOAD=10000_30LANGFLOW_MAX_ITEMS_LENGTH=100_30LANGFLOW_MAX_TEXT_LENGTH=1000_30LANGFLOW_LOG_LEVEL=error_30LANGFLOW_OPEN_BROWSER=false_30LANGFLOW_PORT=7860_30LANGFLOW_REMOVE_API_KEYS=false_30LANGFLOW_SAVE_DB_IN_CONFIG_DIR=true_30LANGFLOW_SECRET_KEY=somesecretkey_30LANGFLOW_STORE=true_30LANGFLOW_STORE_ENVIRONMENT_VARIABLES=true_30LANGFLOW_SUPERUSER=adminuser_30LANGFLOW_SUPERUSER_PASSWORD=adminpass_30LANGFLOW_WORKER_TIMEOUT=60000_30LANGFLOW_WORKERS=3
The Langflow project includes a .env.example file to help you get started.
You can copy the contents of this file into your own .env file and replace the example values with your own preferred settings.
| Variable | Format | Default | Description |
|---|---|---|---|
| DO_NOT_TRACK | Boolean | false | If this option is enabled, Langflow does not track telemetry. |
| LANGFLOW_AUTO_LOGIN | Boolean | true | Enable automatic login for Langflow. Set to false to disable automatic login and require the login form to log into the Langflow UI. Setting to false requires LANGFLOW_SUPERUSER and LANGFLOW_SUPERUSER_PASSWORD to be set. |
| LANGFLOW_AUTO_SAVING | Boolean | true | Enable flow auto-saving. See --auto-saving option. |
| LANGFLOW_AUTO_SAVING_INTERVAL | Integer | 1000 | Set the interval for flow auto-saving in milliseconds. See --auto-saving-interval option. |
| LANGFLOW_BACKEND_ONLY | Boolean | false | Only run Langflow's backend server (no frontend). See --backend-only option. |
| LANGFLOW_BUNDLE_URLS | List[String] | [] | A list of URLs from which to load component bundles and flows. Supports GitHub URLs. If LANGFLOW_AUTO_LOGIN is enabled, flows from these bundles are loaded into the database. |
| LANGFLOW_CACHE_TYPE | String | async | Set the cache type for Langflow. Possible values: async, redis, memory, disk.If you set the type to redis, then you must also set the following environment variables: LANGFLOW_REDIS_HOST, LANGFLOW_REDIS_PORT, LANGFLOW_REDIS_DB, and LANGFLOW_REDIS_CACHE_EXPIRE. |
| LANGFLOW_COMPONENTS_PATH | String | langflow/components | Path to the directory containing custom components. See --components-path option. |
| LANGFLOW_CONFIG_DIR | String | See description | Set the Langflow configuration directory where files, logs, and the Langflow database are stored. Defaults: Linux/WSL: ~/.cache/langflow/macOS: /Users/<username>/Library/Caches/langflow/Windows: %LOCALAPPDATA%\langflow\langflow\Cache |
| LANGFLOW_DATABASE_URL | String | Not set | Set the database URL for Langflow. If not provided, Langflow uses a SQLite database. |
| LANGFLOW_DATABASE_CONNECTION_RETRY | Boolean | false | If True, Langflow tries to connect to the database again if it fails. |
| LANGFLOW_DB_POOL_SIZE | Integer | 10 | DEPRECATED: Use LANGFLOW_DB_CONNECTION_SETTINGS instead. The number of connections to keep open in the connection pool. |
| LANGFLOW_DB_MAX_OVERFLOW | Integer | 20 | DEPRECATED: Use LANGFLOW_DB_CONNECTION_SETTINGS instead. The number of connections to allow that can be opened beyond the pool size. |
| LANGFLOW_DB_CONNECT_TIMEOUT | Integer | 20 | The number of seconds to wait before giving up on a lock to be released or establishing a connection to the database. |
| LANGFLOW_DB_CONNECTION_SETTINGS | JSON | Not set | A JSON dictionary to centralize database connection parameters. Example: {"pool_size": 10, "max_overflow": 20} |
| LANGFLOW_DISABLE_TRACK_APIKEY_USAGE | Boolean | false | If set to true, disables tracking of API key usage (total_uses and last_used_at) to avoid database contention under high concurrency. |
| LANGFLOW_ENABLE_LOG_RETRIEVAL | Boolean | false | Enable log retrieval functionality. |
| LANGFLOW_FALLBACK_TO_ENV_VAR | Boolean | true | If enabled, global variables set in the Langflow UI fall back to an environment variable with the same name when Langflow fails to retrieve the variable value. |
| LANGFLOW_FRONTEND_PATH | String | ./frontend | Path to the frontend directory containing build files. This is for development purposes only. See --frontend-path option. |
| LANGFLOW_HEALTH_CHECK_MAX_RETRIES | Integer | 5 | Set the maximum number of retries for the health check. See --health-check-max-retries option. |
| LANGFLOW_HOST | String | localhost | The host on which the Langflow server will run. See --host option. |
| LANGFLOW_LANGCHAIN_CACHE | String | InMemoryCache | Type of cache to use. Possible values: InMemoryCache, SQLiteCache.See --cache option. |
| LANGFLOW_LOG_LEVEL | String | INFO | Set the logging level for Langflow. Possible values: DEBUG, INFO, WARNING, ERROR, CRITICAL. |
| LANGFLOW_LOG_FILE | String | Not set | Path to the log file. If this option is not set, logs are written to stdout. |
| LANGFLOW_LOG_RETRIEVER_BUFFER_SIZE | Integer | 10000 | Set the buffer size for log retrieval. Only used if LANGFLOW_ENABLE_LOG_RETRIEVAL is enabled. |
| LANGFLOW_MAX_FILE_SIZE_UPLOAD | Integer | 100 | Set the maximum file size for the upload in megabytes. See --max-file-size-upload option. |
| LANGFLOW_MCP_SERVER_ENABLED | Boolean | true | If this option is set to False, Langflow does not enable the MCP server. |
| LANGFLOW_MCP_SERVER_ENABLE_PROGRESS_NOTIFICATIONS | Boolean | false | If this option is set to True, Langflow sends progress notifications in the MCP server. |
| LANGFLOW_NEW_USER_IS_ACTIVE | Boolean | false | When enabled, new users are automatically activated and can log in without requiring explicit activation by the superuser. |
| LANGFLOW_OPEN_BROWSER | Boolean | false | Open the system web browser on startup. See --open-browser option. |
| LANGFLOW_PORT | Integer | 7860 | The port on which the Langflow server runs. The server automatically selects a free port if the specified port is in use. See --port option. |
| LANGFLOW_PROMETHEUS_ENABLED | Boolean | false | Expose Prometheus metrics. |
| LANGFLOW_PROMETHEUS_PORT | Integer | 9090 | Set the port on which Langflow exposes Prometheus metrics. |
| LANGFLOW_REDIS_CACHE_EXPIRE | Integer | 3600 | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_DB | Integer | 0 | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_HOST | String | localhost | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_PORT | String | 6379 | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_PASSWORD | String | Not set | Password for Redis authentication when using Redis cache type. |
| LANGFLOW_REMOVE_API_KEYS | Boolean | false | Remove API keys from the projects saved in the database. See --remove-api-keys option. |
| LANGFLOW_SAVE_DB_IN_CONFIG_DIR | Boolean | false | Save the Langflow database in LANGFLOW_CONFIG_DIR instead of in the Langflow package directory. Note, when this variable is set to default (false), the database isn't shared between different virtual environments and the database is deleted when you uninstall Langflow. |
| LANGFLOW_SECRET_KEY | String | Auto-generated | Key used for encrypting sensitive data like API keys. If a key is not provided, a secure key is auto-generated. For production environments with multiple instances, you should explicitly set this to ensure consistent encryption across instances. |
| LANGFLOW_STORE | Boolean | true | Enable the Langflow Store. See --store option. |
| LANGFLOW_STORE_ENVIRONMENT_VARIABLES | Boolean | true | Store environment variables as global variables in the database. |
| LANGFLOW_UPDATE_STARTER_PROJECTS | Boolean | true | If this option is enabled, Langflow updates starter projects with the latest component versions when initializing. |
| LANGFLOW_SUPERUSER | String | langflow | Set the name for the superuser. Required if LANGFLOW_AUTO_LOGIN is set to false.See superuser --username option. |
| LANGFLOW_SUPERUSER_PASSWORD | String | langflow | Set the password for the superuser. Required if LANGFLOW_AUTO_LOGIN is set to false.See superuser --password option. |
| LANGFLOW_VARIABLES_TO_GET_FROM_ENVIRONMENT | String | Not set | Comma-separated list of environment variables to get from the environment and store as global variables. |
| LANGFLOW_LOAD_FLOWS_PATH | String | Not set | Path to a directory containing flow JSON files to be loaded on startup. Note that this feature only works if LANGFLOW_AUTO_LOGIN is enabled. |
| LANGFLOW_WORKER_TIMEOUT | Integer | 300 | Worker timeout in seconds. See --worker-timeout option. |
| LANGFLOW_WORKERS | Integer | 1 | Number of worker processes. See --workers option. |
| LANGFLOW_SSL_CERT_FILE | String | Not set | Path to the SSL certificate file on the local system. |
| LANGFLOW_SSL_KEY_FILE | String | Not set | Path to the SSL key file on the local system. |
| Variable | Format | Default | Description |
|---|---|---|---|
| DO_NOT_TRACK | Boolean | false | If this option is enabled, Langflow does not track telemetry. |
| LANGFLOW_AUTO_LOGIN | Boolean | true | Enable automatic login for Langflow. Set to false to disable automatic login and require the login form to log into the Langflow UI. Setting to false requires LANGFLOW_SUPERUSER and LANGFLOW_SUPERUSER_PASSWORD to be set. |
| LANGFLOW_AUTO_SAVING | Boolean | true | Enable flow auto-saving. See --auto-saving option. |
| LANGFLOW_AUTO_SAVING_INTERVAL | Integer | 1000 | Set the interval for flow auto-saving in milliseconds. See --auto-saving-interval option. |
| LANGFLOW_BACKEND_ONLY | Boolean | false | Only run Langflow's backend server (no frontend). See --backend-only option. |
| LANGFLOW_BUNDLE_URLS | List[String] | [] | A list of URLs from which to load component bundles and flows. Supports GitHub URLs. If LANGFLOW_AUTO_LOGIN is enabled, flows from these bundles are loaded into the database. |
| LANGFLOW_CACHE_TYPE | String | async | Set the cache type for Langflow. Possible values: async, redis, memory, disk.If you set the type to redis, then you must also set the following environment variables: LANGFLOW_REDIS_HOST, LANGFLOW_REDIS_PORT, LANGFLOW_REDIS_DB, and LANGFLOW_REDIS_CACHE_EXPIRE. |
| LANGFLOW_COMPONENTS_PATH | String | langflow/components | Path to the directory containing custom components. See --components-path option. |
| LANGFLOW_CONFIG_DIR | String | See description | Set the Langflow configuration directory where files, logs, and the Langflow database are stored. Defaults: Linux/WSL: ~/.cache/langflow/macOS: /Users/<username>/Library/Caches/langflow/Windows: %LOCALAPPDATA%\langflow\langflow\Cache |
| LANGFLOW_DATABASE_URL | String | Not set | Set the database URL for Langflow. If not provided, Langflow uses a SQLite database. |
| LANGFLOW_DATABASE_CONNECTION_RETRY | Boolean | false | If True, Langflow tries to connect to the database again if it fails. |
| LANGFLOW_DB_POOL_SIZE | Integer | 10 | DEPRECATED: Use LANGFLOW_DB_CONNECTION_SETTINGS instead. The number of connections to keep open in the connection pool. |
| LANGFLOW_DB_MAX_OVERFLOW | Integer | 20 | DEPRECATED: Use LANGFLOW_DB_CONNECTION_SETTINGS instead. The number of connections to allow that can be opened beyond the pool size. |
| LANGFLOW_DB_CONNECT_TIMEOUT | Integer | 20 | The number of seconds to wait before giving up on a lock to be released or establishing a connection to the database. |
| LANGFLOW_DB_CONNECTION_SETTINGS | JSON | Not set | A JSON dictionary to centralize database connection parameters. Example: {"pool_size": 10, "max_overflow": 20} |
| LANGFLOW_DISABLE_TRACK_APIKEY_USAGE | Boolean | false | If set to true, disables tracking of API key usage (total_uses and last_used_at) to avoid database contention under high concurrency. |
| LANGFLOW_ENABLE_LOG_RETRIEVAL | Boolean | false | Enable log retrieval functionality. |
| LANGFLOW_FALLBACK_TO_ENV_VAR | Boolean | true | If enabled, global variables set in the Langflow UI fall back to an environment variable with the same name when Langflow fails to retrieve the variable value. |
| LANGFLOW_FRONTEND_PATH | String | ./frontend | Path to the frontend directory containing build files. This is for development purposes only. See --frontend-path option. |
| LANGFLOW_HEALTH_CHECK_MAX_RETRIES | Integer | 5 | Set the maximum number of retries for the health check. See --health-check-max-retries option. |
| LANGFLOW_HOST | String | localhost | The host on which the Langflow server will run. See --host option. |
| LANGFLOW_LANGCHAIN_CACHE | String | InMemoryCache | Type of cache to use. Possible values: InMemoryCache, SQLiteCache.See --cache option. |
| LANGFLOW_LOG_LEVEL | String | INFO | Set the logging level for Langflow. Possible values: DEBUG, INFO, WARNING, ERROR, CRITICAL. |
| LANGFLOW_LOG_FILE | String | Not set | Path to the log file. If this option is not set, logs are written to stdout. |
| LANGFLOW_LOG_RETRIEVER_BUFFER_SIZE | Integer | 10000 | Set the buffer size for log retrieval. Only used if LANGFLOW_ENABLE_LOG_RETRIEVAL is enabled. |
| LANGFLOW_MAX_FILE_SIZE_UPLOAD | Integer | 100 | Set the maximum file size for the upload in megabytes. See --max-file-size-upload option. |
| LANGFLOW_MAX_ITEMS_LENGTH | Integer | 100 | Maximum number of items to store and display in the UI. Lists longer than this will be truncated when displayed in the UI. Does not affect data passed between components nor outputs. |
| LANGFLOW_MAX_TEXT_LENGTH | Integer | 1000 | Maximum number of characters to store and display in the UI. Responses longer than this will be truncated when displayed in the UI. Does not truncate responses between components nor outputs. |
| LANGFLOW_MCP_SERVER_ENABLED | Boolean | true | If this option is set to False, Langflow does not enable the MCP server. |
| LANGFLOW_MCP_SERVER_ENABLE_PROGRESS_NOTIFICATIONS | Boolean | false | If this option is set to True, Langflow sends progress notifications in the MCP server. |
| LANGFLOW_NEW_USER_IS_ACTIVE | Boolean | false | When enabled, new users are automatically activated and can log in without requiring explicit activation by the superuser. |
| LANGFLOW_OPEN_BROWSER | Boolean | false | Open the system web browser on startup. See --open-browser option. |
| LANGFLOW_PORT | Integer | 7860 | The port on which the Langflow server runs. The server automatically selects a free port if the specified port is in use. See --port option. |
| LANGFLOW_PROMETHEUS_ENABLED | Boolean | false | Expose Prometheus metrics. |
| LANGFLOW_PROMETHEUS_PORT | Integer | 9090 | Set the port on which Langflow exposes Prometheus metrics. |
| LANGFLOW_REDIS_CACHE_EXPIRE | Integer | 3600 | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_DB | Integer | 0 | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_HOST | String | localhost | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_PORT | String | 6379 | See LANGFLOW_CACHE_TYPE. |
| LANGFLOW_REDIS_PASSWORD | String | Not set | Password for Redis authentication when using Redis cache type. |
| LANGFLOW_REMOVE_API_KEYS | Boolean | false | Remove API keys from the projects saved in the database. See --remove-api-keys option. |
| LANGFLOW_SAVE_DB_IN_CONFIG_DIR | Boolean | false | Save the Langflow database in LANGFLOW_CONFIG_DIR instead of in the Langflow package directory. Note, when this variable is set to default (false), the database isn't shared between different virtual environments and the database is deleted when you uninstall Langflow. |
| LANGFLOW_SECRET_KEY | String | Auto-generated | Key used for encrypting sensitive data like API keys. If a key is not provided, a secure key is auto-generated. For production environments with multiple instances, you should explicitly set this to ensure consistent encryption across instances. |
| LANGFLOW_STORE | Boolean | true | Enable the Langflow Store. See --store option. |
| LANGFLOW_STORE_ENVIRONMENT_VARIABLES | Boolean | true | Store environment variables as global variables in the database. |
| LANGFLOW_UPDATE_STARTER_PROJECTS | Boolean | true | If this option is enabled, Langflow updates starter projects with the latest component versions when initializing. |
| LANGFLOW_SUPERUSER | String | langflow | Set the name for the superuser. Required if LANGFLOW_AUTO_LOGIN is set to false.See superuser --username option. |
| LANGFLOW_SUPERUSER_PASSWORD | String | langflow | Set the password for the superuser. Required if LANGFLOW_AUTO_LOGIN is set to false.See superuser --password option. |
| LANGFLOW_VARIABLES_TO_GET_FROM_ENVIRONMENT | String | Not set | Comma-separated list of environment variables to get from the environment and store as global variables. |
| LANGFLOW_LOAD_FLOWS_PATH | String | Not set | Path to a directory containing flow JSON files to be loaded on startup. Note that this feature only works if LANGFLOW_AUTO_LOGIN is enabled. |
| LANGFLOW_WORKER_TIMEOUT | Integer | 300 | Worker timeout in seconds. See --worker-timeout option. |
| LANGFLOW_WORKERS | Integer | 1 | Number of worker processes. See --workers option. |
| LANGFLOW_SSL_CERT_FILE | String | Not set | Path to the SSL certificate file on the local system. |
| LANGFLOW_SSL_KEY_FILE | String | Not set | Path to the SSL key file on the local system. |
The following examples show how to configure Langflow using environment variables in different scenarios.
-The .env file is a text file that contains key-value pairs of environment variables.
Create or edit a file named .env in your project root directory and add your configuration:
_28DO_NOT_TRACK=true_28LANGFLOW_AUTO_LOGIN=false_28LANGFLOW_AUTO_SAVING=true_28LANGFLOW_AUTO_SAVING_INTERVAL=1000_28LANGFLOW_BACKEND_ONLY=false_28LANGFLOW_BUNDLE_URLS=["https://github.com/user/repo/commit/hash"]_28LANGFLOW_CACHE_TYPE=async_28LANGFLOW_COMPONENTS_PATH=/path/to/components/_28LANGFLOW_CONFIG_DIR=/path/to/config/_28LANGFLOW_DATABASE_URL=postgresql://user:password@localhost:5432/langflow_28LANGFLOW_DEV=false_28LANGFLOW_FALLBACK_TO_ENV_VAR=false_28LANGFLOW_HEALTH_CHECK_MAX_RETRIES=5_28LANGFLOW_HOST=localhost_28LANGFLOW_LANGCHAIN_CACHE=InMemoryCache_28LANGFLOW_MAX_FILE_SIZE_UPLOAD=10000_28LANGFLOW_LOG_LEVEL=error_28LANGFLOW_OPEN_BROWSER=false_28LANGFLOW_PORT=7860_28LANGFLOW_REMOVE_API_KEYS=false_28LANGFLOW_SAVE_DB_IN_CONFIG_DIR=true_28LANGFLOW_SECRET_KEY=somesecretkey_28LANGFLOW_STORE=true_28LANGFLOW_STORE_ENVIRONMENT_VARIABLES=true_28LANGFLOW_SUPERUSER=adminuser_28LANGFLOW_SUPERUSER_PASSWORD=adminpass_28LANGFLOW_WORKER_TIMEOUT=60000_28LANGFLOW_WORKERS=3
A systemd service configuration file configures Linux system services.
To add environment variables, create or edit a service configuration file and add an override.conf file. This file allows you to override the default environment variables for the service.
_31[Service]_31Environment="DO_NOT_TRACK=true"_31Environment="LANGFLOW_AUTO_LOGIN=false"_31Environment="LANGFLOW_AUTO_SAVING=true"_31Environment="LANGFLOW_AUTO_SAVING_INTERVAL=1000"_31Environment="LANGFLOW_BACKEND_ONLY=false"_31Environment="LANGFLOW_BUNDLE_URLS=[\"https://github.com/user/repo/commit/hash\"]"_31Environment="LANGFLOW_CACHE_TYPE=async"_31Environment="LANGFLOW_COMPONENTS_PATH=/path/to/components/"_31Environment="LANGFLOW_CONFIG_DIR=/path/to/config"_31Environment="LANGFLOW_DATABASE_URL=postgresql://user:password@localhost:5432/langflow"_31Environment="LANGFLOW_DEV=false"_31Environment="LANGFLOW_FALLBACK_TO_ENV_VAR=false"_31Environment="LANGFLOW_HEALTH_CHECK_MAX_RETRIES=5"_31Environment="LANGFLOW_HOST=localhost"_31Environment="LANGFLOW_LANGCHAIN_CACHE=InMemoryCache"_31Environment="LANGFLOW_MAX_FILE_SIZE_UPLOAD=10000"_31Environment="LANGFLOW_LOG_ENV=container_json"_31Environment="LANGFLOW_LOG_FILE=logs/langflow.log"_31Environment="LANGFLOW_LOG_LEVEL=error"_31Environment="LANGFLOW_OPEN_BROWSER=false"_31Environment="LANGFLOW_PORT=7860"_31Environment="LANGFLOW_REMOVE_API_KEYS=false"_31Environment="LANGFLOW_SAVE_DB_IN_CONFIG_DIR=true"_31Environment="LANGFLOW_SECRET_KEY=somesecretkey"_31Environment="LANGFLOW_STORE=true"_31Environment="LANGFLOW_STORE_ENVIRONMENT_VARIABLES=true"_31Environment="LANGFLOW_SUPERUSER=adminuser"_31Environment="LANGFLOW_SUPERUSER_PASSWORD=adminpass"_31Environment="LANGFLOW_WORKER_TIMEOUT=60000"_31Environment="LANGFLOW_WORKERS=3"
For more information on systemd, see the Red Hat documentation.
The tasks.json file located in .vscode/tasks.json is a configuration file for development environments using Visual Studio Code.
Create or edit the .vscode/tasks.json file in your project root:
_46{_46 "version": "2.0.0",_46 "options": {_46 "env": {_46 "DO_NOT_TRACK": "true",_46 "LANGFLOW_AUTO_LOGIN": "false",_46 "LANGFLOW_AUTO_SAVING": "true",_46 "LANGFLOW_AUTO_SAVING_INTERVAL": "1000",_46 "LANGFLOW_BACKEND_ONLY": "false",_46 "LANGFLOW_BUNDLE_URLS": "[\"https://github.com/user/repo/commit/hash\"]",_46 "LANGFLOW_CACHE_TYPE": "async",_46 "LANGFLOW_COMPONENTS_PATH": "D:/path/to/components/",_46 "LANGFLOW_CONFIG_DIR": "D:/path/to/config/",_46 "LANGFLOW_DATABASE_URL": "postgresql://postgres:password@localhost:5432/langflow",_46 "LANGFLOW_DEV": "false",_46 "LANGFLOW_FALLBACK_TO_ENV_VAR": "false",_46 "LANGFLOW_HEALTH_CHECK_MAX_RETRIES": "5",_46 "LANGFLOW_HOST": "localhost",_46 "LANGFLOW_LANGCHAIN_CACHE": "InMemoryCache",_46 "LANGFLOW_MAX_FILE_SIZE_UPLOAD": "10000",_46 "LANGFLOW_LOG_ENV": "container_csv",_46 "LANGFLOW_LOG_FILE": "langflow.log",_46 "LANGFLOW_LOG_LEVEL": "error",_46 "LANGFLOW_OPEN_BROWSER": "false",_46 "LANGFLOW_PORT": "7860",_46 "LANGFLOW_REMOVE_API_KEYS": "true",_46 "LANGFLOW_SAVE_DB_IN_CONFIG_DIR": "false",_46 "LANGFLOW_SECRET_KEY": "somesecretkey",_46 "LANGFLOW_STORE": "true",_46 "LANGFLOW_STORE_ENVIRONMENT_VARIABLES": "true",_46 "LANGFLOW_SUPERUSER": "adminuser",_46 "LANGFLOW_SUPERUSER_PASSWORD": "adminpass",_46 "LANGFLOW_WORKER_TIMEOUT": "60000",_46 "LANGFLOW_WORKERS": "3"_46 }_46 },_46 "tasks": [_46 {_46 "label": "langflow backend",_46 "type": "shell",_46 "command": ". ./langflownightly/Scripts/activate && langflow run",_46 "isBackground": true,_46 "problemMatcher": []_46 }_46 ]_46}
To run Langflow using the above VSCode tasks.json file, in the VSCode command palette, select Tasks: Run Task > langflow backend.