# LangChain MCP Client Streamlit App

A Streamlit web interface for connecting to one or more MCP servers and chatting with them through a chosen language model provider, supporting OpenAI, Anthropic, Google and Ollama.

The app connects to multiple MCP servers at once, exposing each server's tools to the selected language model and letting a developer test individual tools with custom parameters directly in the interface. It also works in a chat-only mode with no MCP servers connected, for plain conversation.

Chat messages can carry image, PDF or plain-text and markdown attachments, with images sent as inline vision input to models that support it; PDF text is extracted client-side before being added to the conversation. The app keeps short-term session memory and a longer persistent, cross-session memory, logs every tool execution and conversation, supports exporting and re-importing chat history, and can be deployed with Docker. The project is under active development and may still contain incomplete features.

Website: https://github.com/guinacio/langchain-mcp-client