MCP API Engineering Lab

MCP API Engineering Lab

A public MCP server demonstrating how an AI agent can retrieve database schemas and manage local OpenAPI contracts via tools for CRUD operations.

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README

MCP API Engineering Lab

Servidor MCP público y genérico para demostrar cómo un agente puede recibir contexto desde una base de datos y contratos OpenAPI.

Creado desde cero para el portafolio. No contiene código, endpoints, reglas, esquemas ni credenciales de clientes.

Stack

  • TypeScript
  • MCP TypeScript SDK v2
  • Zod
  • PostgreSQL (pg)
  • OpenAPI YAML

Architecture

flowchart LR
    DB[(PostgreSQL)] --> MCP[MCP Server]
    OpenAPI[OpenAPI contracts] --> MCP
    MCP --> Agent[MCP-capable AI client]
    Agent --> Code[Code / API tasks]

Tools

  • get_database_schema
  • list_api_contracts
  • get_api_contract
  • create_api_contract
  • update_api_contract
  • delete_api_contract

Ejecutar

npm install
npm run build
npm start

Para desarrollo:

npm run dev

Base de datos

Si defines DATABASE_URL, el tool get_database_schema consulta information_schema.

Si no está definida, devuelve data/sample-schema.sql, para poder demostrar el servidor sin infraestructura externa.

OpenAPI

Los contratos viven en contracts/.

El MCP puede leer, crear, actualizar y eliminar contratos locales. template.yaml está protegido.

Cliente MCP

Configura este proyecto como servidor stdio con:

node /ruta/al/repositorio/dist/index.js

Usa la documentación de tu cliente MCP para el formato exacto de configuración.

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