TODO list MCP server (Exercício 4.2)

TODO list MCP server (Exercício 4.2)

Local MCP server that exposes tools for a TODO list, acting as an adapter between an AI agent and a REST API (localhost:8000).

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MCP server da TODO list — Exercício 4.2

Um MCP server local que expõe tools de uma lista de tarefas para um agente de IA. As tools não guardam estado próprio: elas chamam a API REST do Exercício 4.1 (http://localhost:8000). O MCP é a camada de adaptação entre o mundo do agente (MCP) e a fonte do dado (HTTP).

Aluno: Antonio Diniz · Disciplina: IDP-TD 2026

  Agente / LLM  ──MCP──▶  servidor_mcp.py  ──HTTP──▶  API 4.1 (localhost:8000)

Tools expostas

Tool Chamada HTTP Retorno
criar_tarefa(titulo) POST /tarefas a tarefa criada {id, titulo, concluida}
listar_tarefas() GET /tarefas lista de tarefas

A URL da API é lida da variável de ambiente API (default http://localhost:8000).

Como rodar

  1. Suba a API do 4.1 (noutro terminal, no repo do 4.1):

    uvicorn app.main:app --port 8000
    
  2. No repo do 4.2:

    pip install -r requirements.txt
    python cliente_teste.py
    

    Deve imprimir o envelope JSON com tools, criar_resultado e listar_resultado.

Para testar apontando para outra porta: API=http://localhost:9010 python cliente_teste.py.

Reflexão (Aula 6)

No 4.1 o cliente precisava falar HTTP: montar URL, método, cabeçalhos, corpo e tratar status. No 4.2 o agente só precisa saber que existe criar_tarefa(titulo). O MCP escondeu o protocolo HTTP — endpoint, verbo, formato do corpo e códigos de status deixaram de importar para quem chama. A tool virou a interface; a API continua sendo a fonte do dado.

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