Integração de LangChain e MCP para processamento de linguagem natural e avaliação de expressões matemáticas.
What is eriktilio mcp langchain integration
LangChain + Gemini + MCP (Tool Server)
Este projeto demonstra como criar um chain com LangChain usando o modelo gemini-2.0-flash do Google e integrá-lo com ferramentas customizadas usando o MCP (Multi-Chain Protocol), via conexão stdio
.
✨ Funcionalidade
A chain é capaz de:
- Interpretar linguagem natural com o Gemini.
- Usar ferramentas externas via MCP — neste exemplo, uma calculadora de expressões matemáticas.
- Executar localmente um servidor de ferramentas que se conecta à chain automaticamente.
🔧 Requisitos
- Python 3.10+
- uv (ou
pip
tradicional)
📦 Instalação
Com uv (recomendado)
uv venv
source .venv`/bin/activate`
uv pip install -r requirements.txt
Ou com pip tradicional
python -m venv .venv
source .venv`/bin/activate`
pip install -r requirements.txt
Crie um arquivo .env:
GOOGLE_API_KEY=sua_chave_google_api
🚀 Execução
1. Execute o servidor de ferramentas (MCP)
Primeiro, execute o servidor de ferramentas. Este servidor vai processar as expressões matemáticas.
python server.py
2. Execute o cliente
Em seguida, execute o cliente, que se conecta ao servidor e faz as requisições, passando a pergunta para a chain e recebendo o resultado do cálculo.
python client.py
Como Funciona?
- O chain usa o modelo Gemini-Pro do Google para interpretar a linguagem natural.
- Uma LLMChain é criada usando o modelo e um PromptTemplate para extrair a expressão matemática de uma pergunta.
- A expressão extraída é então passada para uma ferramenta de cálculo via o protocolo MCP.
- O servidor MCP calcula a expressão matemática e retorna o resultado.
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Frequently Asked Questions
What is MCP?
MCP (Model Context Protocol) is an open protocol that standardizes how applications provide context to LLMs. Think of MCP like a USB-C port for AI applications, providing a standardized way to connect AI models to different data sources and tools.
What are MCP Servers?
MCP Servers are lightweight programs that expose specific capabilities through the standardized Model Context Protocol. They act as bridges between LLMs like Claude and various data sources or services, allowing secure access to files, databases, APIs, and other resources.
How do MCP Servers work?
MCP Servers follow a client-server architecture where a host application (like Claude Desktop) connects to multiple servers. Each server provides specific functionality through standardized endpoints and protocols, enabling Claude to access data and perform actions through the standardized protocol.
Are MCP Servers secure?
Yes, MCP Servers are designed with security in mind. They run locally with explicit configuration and permissions, require user approval for actions, and include built-in security features to prevent unauthorized access and ensure data privacy.
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