Vurb.ts — The TypeScript Framework for MCP Servers

# Vurb.ts > The Express.js for MCP Servers. The framework for the AI era. ## What is Vurb.ts? Vurb.ts is a TypeScript framework for building production-grade MCP (Model Context Protocol) servers. It provides structured routing, data shaping via Presenters, built-in security (DLP, PII redaction, Egress Firewall), middleware pipelines, and one-command deployment. ## Core Concepts - **MVA Pattern** (Model-View-Agent): Replaces MVC for AI. Presenters shape what the LLM perceives — schema allowlists, business rules, affordances, and truncation. - **Fluent API**: `f.query()`, `f.mutation()`, `f.action()` — semantic verbs with Zod validation and type inference. - **Presenters**: Define once, reuse everywhere. Schema strips undeclared fields. Rules guide the agent. Suggestions enable agentic HATEOAS. - **Middleware**: tRPC-style `f.middleware()` with context derivation. Auth, rate limiting, audit — write once, apply everywhere. - **Self-Healing Errors**: `toolError()` and `f.error()` carry structured XML with recovery paths, available actions, and retry hints. - **File-Based Routing**: `autoDiscover()` maps your directory tree to MCP tool definitions with discriminators and action consolidation. ## Security - **Egress Firewall**: Zod schema strips undeclared fields at RAM level. New database columns are invisible unless declared. - **PII Redaction**: `.redactPII()` — V8-optimized via fast-redact. GDPR, LGPD, HIPAA compliant. - **State Gate**: Removes tools from `tools/list` based on workflow state (FSM). Anti-hallucination. - **V8 Isolate Sandbox**: Zero access to `process`, `fs`, `net`. Sealed execution environment. ## Installation ``` npm install @vurb/core @modelcontextprotocol/sdk zod ``` ## Quick Start ``` npx vurb create my-server cd my-server vurb dev vurb deploy ``` ## Links - Docs: https://vurb.vinkius.com - GitHub: https://github.com/vinkius-labs/vurb.ts - npm: https://www.npmjs.com/package/@vurb/core ## Pages - /introduction — Overview, i