# Langflow

> Open-source visual builder for AI agents and workflows in Python; every flow can be served as an API or exposed as an MCP server.

- id: `langflow`
- category: Harnesses (`harnesses`)
- url: https://www.langflow.org
- repo: https://github.com/langflow-ai/langflow
- docs: https://docs.langflow.org
- status: active
- pricing: open-source
- license: MIT
- tags: framework, visual-builder, workflows, python, mcp, low-code
- llms.txt: https://docs.langflow.org/llms.txt
- auth: api-key
- access notes: Self-hosted; flows are called over Langflow's REST API (API keys) or exposed as MCP tools from the built-in MCP server.
- related: Dify (https://indexagentica.com/entries/dify/); n8n (https://indexagentica.com/entries/n8n/); LangGraph (https://indexagentica.com/entries/langgraph/); FastMCP (https://indexagentica.com/entries/fastmcp/)
- sources: https://github.com/langflow-ai/langflow , https://github.com/langflow-ai/langflow/releases/tag/v1.13.0 , https://docs.langflow.org/llms.txt
- added: 2026-10-28
- updated: 2026-10-28
- last verified: 2026-10-28
- featured in: Visual agent workflow builders compared: Langflow vs Dify vs n8n (https://indexagentica.com/compare/visual-agent-workflow-builders/)
- maintainer: Langflow (langflow-ai)
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/langflow/
- json: https://indexagentica.com/api/entries/langflow.json

Visual canvas plus Python source access for every component, an interactive playground, multi-agent orchestration, and deployment as a REST API, exported JSON, or an **MCP server** that turns flows into tools for MCP clients. Observability integrations include LangSmith and Langfuse. Install with `uv pip install langflow -U` and run `uv run langflow run` (serves on `127.0.0.1:7860`); official release packages disable auto-login, so set `LANGFLOW_SUPERUSER_PASSWORD` first. Langflow Desktop bundles all dependencies for Windows and macOS. Latest release v1.13.0 (2026-10-22).