exercicio-4.2-todo-mcp

exercicio-4.2-todo-mcp

MCP server that provides tools to create and list tasks by consuming a REST API, allowing LLMs to manage a TODO list via natural language.

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README

Exercício 4.2 — MCP server local que consome a API do 4.1

MCP server (stdio) que expõe duas tools para uma aplicação de TODO list, implementadas chamando a API REST construída no Exercício 4.1 (http://localhost:8000).

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

Arquivos

  • servidor_mcp.py — MCP server com as tools criar_tarefa e listar_tarefas.
  • cliente_teste.py — sobe o server via stdio, chama as tools e imprime no stdout um envelope JSON único com o resultado.
  • requirements.txt — dependências (mcp, httpx).

Como rodar

  1. Terminal A — suba a API do 4.1 (reinicie para o store ficar limpo):
    uvicorn app.main:app --port 8000     # no repo do 4.1
  2. Terminal B — neste repo:
    pip install -r requirements.txt
python cliente_teste.py
    O comando deve imprimir um envelope JSON com tools, criar_resultado e listar_resultado.

Como validar

Com a API do 4.1 no ar, neste repo:

autograde validar 4.2

Reflexão

No 4.1 o cliente precisava falar HTTP diretamente: montar a URL, escolher o verbo certo, serializar o corpo da requisição e tratar o status code. No 4.2, o agente só precisa saber que existe uma tool criar_tarefa(titulo) e chamá-la — o MCP tornou irrelevante para quem chama como o dado é buscado (protocolo HTTP, URL da API, formato do request/response). O MCP escondeu o transporte: o agente fala MCP, e é a tool que sabe traduzir isso para HTTP contra a API.

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