vurb.ts MCP — Casos de uso, Instalar & Demo ao vivo

Por que usar

Principais recursos

Presenter-based schema — undeclared fields are physically stripped before the LLM sees them
Built-in .redactPII() at the Late Guillotine stage (post-logic, pre-LLM)
FSM State Gates — tools can't execute out of a declared order
File-based routing: drop a tool in src/tools/, it's live
CLI scaffolds (vurb create) and deploy targets (Vinkius Edge, Vercel, Cloudflare Workers)

Demo ao vivo

Como fica na prática

vurb-ts.replay ▶ pronto

0/0

Instalar

Escolha seu cliente

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "vurb-ts": {
      "command": "npx",
      "args": [
        "-y",
        "vurb.ts"
      ],
      "_inferred": true
    }
  }
}

Abra Claude Desktop → Settings → Developer → Edit Config. Reinicie após salvar.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "vurb-ts": {
      "command": "npx",
      "args": [
        "-y",
        "vurb.ts"
      ],
      "_inferred": true
    }
  }
}

Cursor usa o mesmo esquema mcpServers que o Claude Desktop. Config de projeto vence a global.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "vurb-ts": {
      "command": "npx",
      "args": [
        "-y",
        "vurb.ts"
      ],
      "_inferred": true
    }
  }
}

Clique no ícone MCP Servers na barra lateral do Cline, depois "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "vurb-ts": {
      "command": "npx",
      "args": [
        "-y",
        "vurb.ts"
      ],
      "_inferred": true
    }
  }
}

Mesmo formato do Claude Desktop. Reinicie o Windsurf para aplicar.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "vurb-ts",
      "command": "npx",
      "args": [
        "-y",
        "vurb.ts"
      ]
    }
  ]
}

O Continue usa um array de objetos de servidor em vez de um map.

~/.config/zed/settings.json

{
  "context_servers": {
    "vurb-ts": {
      "command": {
        "path": "npx",
        "args": [
          "-y",
          "vurb.ts"
        ]
      }
    }
  }
}

Adicione em context_servers. Zed recarrega automaticamente ao salvar.

claude mcp add vurb-ts -- npx -y vurb.ts

Uma linha só. Verifique com claude mcp list. Remova com claude mcp remove.

Casos de uso

Usos do mundo real: vurb.ts

How to build a PII-safe MCP server with Vurb.ts

👤 Developers building an MCP for a product with customer data ⏱ ~60 min advanced

Quando usar: You're wrapping an internal system and must guarantee PII never leaves the perimeter.

Pré-requisitos

Node 20+ and npm — Standard
Vurb CLI — npm install -g @vurb/cli

Fluxo

Scaffold

Run vurb create customer-mcp with the prisma vector, and open the generated src/tools/ folder.✓ Copiado

→ Scaffolded project
Declare a presenter

Add a presenter for the Customer model that exposes only id, plan, and country. Everything else (email, phone, address) is physically stripped.✓ Copiado

→ LLM sees only declared fields
Add PII redaction on free-text fields

On the Note model's body field, apply .redactPII() at the Late Guillotine.✓ Copiado

→ Emails/phones inside note bodies masked
Test with the in-memory pipeline

Write a @vurb/testing case that feeds a record with fake PII and asserts the output is redacted.✓ Copiado

→ Test passes

Resultado: An MCP server where PII leakage is a compile/runtime impossibility, not a code review item.

Armadilhas

Redaction regex never catches everything — Combine presenter whitelist + redaction — don't rely on redaction alone
Presenter drift over time — CI assertion: snapshot presenter output for key models; fail PRs that change it without review

Enforce correct tool-call order with FSM state gates

👤 MCP authors building multi-step flows (booking, checkout) ⏱ ~30 min intermediate

Quando usar: You have tools that must run in a specific order; you want the framework to enforce it.

Fluxo

Define state machine

Create an FSM for checkout: cart → quote → payment → confirm. Each tool gated by the state.✓ Copiado

→ State definition file
Attach gates to tools

Tool confirm_order only allowed from state=payment.✓ Copiado

→ Calling out-of-order returns a gate error

Resultado: Agents physically cannot skip prerequisite steps.

Deploy a Vurb MCP to Cloudflare Workers or Vinkius Edge

👤 Builders wanting global low-latency MCPs ⏱ ~20 min intermediate

Quando usar: You want the MCP close to users, not in a single region.

Fluxo

Choose target

vurb deploy --target cloudflare✓ Copiado

→ Worker published
Smoke test

List tools via the deployed URL.✓ Copiado

→ Tool list returns from CF

Resultado: A globally distributed MCP server.

Combinações

Combine com outros MCPs para 10× de alavancagem

vurb-ts + jetski

Build with Vurb; operate behind Jetski for OAuth + analytics

Generate a Vurb MCP and deploy behind Jetski so users authenticate via OAuth and we get prompt analytics.✓ Copiado

vurb-ts + proxy-2

Aggregate your Vurb MCP alongside third-party MCPs via mcp-proxy

Register the deployed Vurb MCP as an upstream of mcp-proxy so teammates see it alongside github/sentry.✓ Copiado

Ferramentas

O que este MCP expõe

Ferramenta	Entradas	Quando chamar	Custo
(framework)	You write tools; framework exposes them	N/A — Vurb.ts is for authoring MCP servers, not a runtime MCP to call	n/a

Custo e limites

O que custa rodar

Cota de API: Framework itself has no runtime cost; hosting costs depend on deploy target
Tokens por chamada: Varies by the tools you build
Monetário: Free, open source
Dica: Edge deploys are cheap (CF Workers free tier handles modest traffic).

Segurança

Permissões, segredos, alcance

Armazenamento de credenciais: Whatever your deployed tools need; framework provides middleware hooks for injection

Saída de dados: Depends entirely on the tools you write

PII protections are opt-in — if you skip presenter declarations, raw DB rows go to the LLM.
SKILL.md files are shipped to agents; review before publishing.

Solução de problemas

Erros comuns e correções

Tool file added but not showing up

File-based router watches src/tools/; restart dev server or check the export pattern.

Verificar: vurb dev logs

Presenter strips too much

Ensure presenter fields match the schema; add missing fields back explicitly.

Verificar: Unit test presenter output

State gate error on a valid call

Check FSM transitions — source state might not match. Print current state in middleware.

Verificar: Add a log in state middleware

Alternativas

vurb.ts vs. outros

Alternativa	Quando usar	Troca
FastMCP (TypeScript)	You want the minimum boilerplate, no opinionated guards	No PII/FSM features — you bolt them on
@modelcontextprotocol/sdk	You want raw protocol control	Bring your own auth, redaction, tests
volcano-agent-sdk	You're building agents that consume MCPs, not servers	Different role in the stack

Mais

Recursos

📖 Leia o README oficial no GitHub

🐙 Ver issues abertas

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