docfy-mcp

docfy-mcp

Exposes an OpenAPI catalog as tools for AI agents (e.g., Claude Code, Cursor) to query API endpoints via list_endpoints and get_endpoint tools, enabling interactive API exploration without a browser.

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README

docfy-mcp

Servidor MCP (stdio) que expõe um catálogo OpenAPI — de preferência um já documentado com nestjs-docfy, mas funciona com qualquer spec OpenAPI 3.0/3.1 válida — como tools pra agentes de código (Claude Code, Cursor etc.) consultarem durante a implementação de um client, sem abrir o navegador.

Tools

  • list_endpoints — lista todos os endpoints (method + path + summary). Aceita filter opcional (substring case-insensitive em path/summary/tags).
  • get_endpoint — recebe method + path, devolve o texto completo no formato "Copy for AI" (Purpose, Request, Parameters, Validation, Success Response, Error Responses).

Uso

Publicado no npm — não precisa clonar nem buildar:

# a partir de um arquivo estático
npx docfy-mcp --spec ./openapi.json

# a partir de um servidor NestJS rodando localmente
npx docfy-mcp --url http://localhost:3000/docs-json

--url faz o fetch da spec diretamente (não delega ao resolver HTTP do swagger-parser), justamente para funcionar contra localhost — o safeUrlResolver do swagger-parser bloqueia URLs locais/privadas por padrão (proteção SSRF), o que quebraria o caso de uso mais comum daqui: apontar pro dev server NestJS local.

O path do JSON não é convenção fixa — depende do que o projeto passou pra SwaggerModule.setup() (/api-json, /docs-json, /swagger-json...). Se --url der 404, o docfy-mcp sonda os paths mais comuns na mesma origem e sugere qualquer um que pareça um documento OpenAPI de verdade.

Pra specs atrás de auth, repita --header quantas vezes precisar:

npx docfy-mcp --url https://api.exemplo.com/api-json --header "Authorization: Bearer xyz"

Pra desenvolver neste repo: npm install && npm run build, depois node dist/cli.js --spec/--url ... (ou npm run dev via tsx).

Registrar como MCP server local (Claude Code / Cursor)

Adicione um .mcp.json na raiz do projeto onde o client MCP vai rodar:

{
  "mcpServers": {
    "docfy": {
      "command": "npx",
      "args": ["-y", "docfy-mcp", "--url", "http://localhost:3000/docs-json"]
    }
  }
}

Reinicie o client MCP; as tools list_endpoints e get_endpoint devem aparecer na lista de tools disponíveis.

Escopo do fim de semana

Fora do escopo por ora (ver docfy-mcp-planejamento.md na raiz do container): CI/lint completo, transporte HTTP/SSE, search_endpoints (busca semântica), autenticação/spec atrás de login.

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