Overview
Langflow gives you a visual canvas for wiring LLMs, retrieval steps and tools into a flow, and its standout feature is what happens next: every flow automatically becomes available as an MCP tool over streamable HTTP, so Claude, Cursor or any MCP client can call a research-and-draft pipeline you built by dragging boxes. It is MIT licensed and free to self-host. Two things to know before committing — it now belongs to IBM through the 2025 DataStax acquisition rather than being an independent project, and while a free cloud signup exists there is no published cloud pricing at all, so plan around self-hosting.
Key Features
- ✓Official MCP server — flows auto-expose as callable tools
- ✓Works as both MCP server and MCP client
- ✓Visual flow builder for LLM and retrieval pipelines
- ✓MIT licensed and free to self-host
- ✓Owned by IBM via the 2025 DataStax acquisition
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