Partial Lfx Component Categories - Langflow

Control which components load

LFX loads all component categories by default. Use environment variables to restrict which categories are available when loading flows.

Variable	Description
`LANGFLOW_COMPONENT_CATEGORY_ALLOWLIST`	Comma-separated list of category names to include. If empty, all categories are included.
`LANGFLOW_COMPONENT_CATEGORY_BLOCKLIST`	Comma-separated list of category names to exclude. Applied after the allowlist.

Category names are case-insensitive. The virtual keyword core in the allowlist or blocklist expands to all core component categories.

Component category names don't always match the labels displayed in the Langflow visual editor. To view the component categories, see Bundle list.

To restrict components to specific categories:

bash

export LANGFLOW_COMPONENT_CATEGORY_ALLOWLIST="openai,anthropic,processing,input_output"
uv run lfx serve my_flow.json

To exclude specific categories:

bash

export LANGFLOW_COMPONENT_CATEGORY_BLOCKLIST="prototypes,langchain_utilities"
uv run lfx run my_flow.json "Hello"

To allow only core categories:

bash

export LANGFLOW_COMPONENT_CATEGORY_ALLOWLIST="core"
uv run lfx serve my_flow.json