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nod-mcp-server

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nod-mcp-server

Así es como los agentes de IA interactuarán con las empresas: no mediante scraping, sino leyendo manifiestos estructurados. Este servidor MCP de referencia enseña a cualquier cliente compatible con MCP (Claude Desktop, frameworks de agentes, IDEs) a leer el manifiesto nod.json de una empresa en https://{domain}/.well-known/nod.json y a responder preguntas reales sobre lo que la empresa puede hacer: pedir comida, reservar una cita, buscar productos, consultar precios y más.

Expone dos herramientas — lookup_nod y check_capability — e incluye cuatro manifiestos de demostración servidos localmente para que la demo funcione de inmediato sin dependencias externas.

Instalación

git clone <this repo> nod-mcp-server
cd nod-mcp-server
npm install
npm run build

Requiere Node.js 20+.

Related MCP server: Vexi MCP Server

Ejecutar el servidor de manifiestos de demostración

Casi ningún sitio real publica nod.json todavía, por lo que este repositorio incluye cuatro ejemplos de manifiestos (restaurante, comercio electrónico, SaaS, atención médica) y los sirve localmente.

npm run demo:manifests

Deberías ver:

NOD demo manifest server listening on http://localhost:3456
  http://localhost:3456/demo-restaurant.localhost/nod.json
  http://localhost:3456/demo-shop.localhost/nod.json
  http://localhost:3456/demo-saas.localhost/nod.json
  http://localhost:3456/demo-health.localhost/nod.json

Deja esta terminal abierta durante la demostración. El servidor MCP redirige automáticamente cualquier dominio *.localhost a este servidor.

Configurar Claude Desktop

Abre (o crea) ~/Library/Application Support/Claude/claude_desktop_config.json en macOS (o %APPDATA%\Claude\claude_desktop_config.json en Windows) y añade:

{
  "mcpServers": {
    "nod": {
      "command": "node",
      "args": ["/ABSOLUTE/PATH/TO/nod-mcp-server/dist/index.js"]
    }
  }
}

Reemplaza /ABSOLUTE/PATH/TO/nod-mcp-server con la ruta completa a este repositorio (por ejemplo, /Users/you/projects/nod-mcp-server). Reinicia Claude Desktop. Ahora deberías ver el servidor nod listado en el selector de herramientas de Claude con dos herramientas: lookup_nod y check_capability.

Guion de demostración de 60 segundos

Con el servidor de manifiestos de demostración ejecutándose en una terminal y Claude Desktop configurado, pega estos prompts en Claude uno tras otro.

1. "Look up the NOD manifest for demo-restaurant.localhost"

Claude llama a lookup_nod({ domain: "demo-restaurant.localhost" }) y devuelve algo como:

# Pike Place Noodle House  (restaurant)
Hand-pulled noodles, dumplings, and regional Chinese classics...

- URL: https://demo-restaurant.localhost
- Manifest: http://localhost:3456/demo-restaurant.localhost/nod.json

## Declared capabilities
  - purchase
  - booking
  - view_menu
  - order_food
  - book_table

## Supported actions
  - purchase → https://demo-restaurant.localhost/api/orders [auth: api_key]
  - booking  → https://demo-restaurant.localhost/api/reservations [auth: api_key]
  - search   → https://demo-restaurant.localhost/api/menu/search [auth: none]

2. "Can I order food from demo-restaurant.localhost?"

Claude llama a check_capability({ domain: "demo-restaurant.localhost", action: "order_food" }):

YES — demo-restaurant.localhost supports "order_food".
Manifest declares "order_food" under discovery.mcp_server.capabilities.

Endpoint: POST https://demo-restaurant.localhost/api/orders
Authentication: api_key
Matched via: discovery.mcp_server.capabilities

Constraints:
{ "require_human_confirmation": { "purchases_above": 150, ... },
  "rate_limits": { "transactions": { "requests": 10, "period": "minute" } },
  "allow_automated_purchases": true }

3. "What actions does demo-shop.localhost support?"

Claude llama a lookup_nod({ domain: "demo-shop.localhost" }) y resume: búsqueda de productos, precios, comprobaciones de inventario y realización de pedidos protegida por OAuth2 — con un umbral de confirmación humana de 500 $ y una política de devoluciones de 60 días.

Prompts adicionales

  • "Book an appointment at demo-health.localhost — what does that flow require?" → devuelve el endpoint de reserva, los campos requeridos (patient_name, DOB, reason, provider_id, preferred_date), los alcances de OAuth2 y la política de cancelación.

  • "Does demo-saas.localhost allow automated purchases?" → devuelve NO con la URL de respaldo humano, porque el manifiesto establece allow_automated_purchases: false.

Referencia de herramientas

lookup_nod

Entrada

Tipo

Descripción

domain

string

Solo el dominio (sin esquema, sin ruta). Los dominios *.localhost se redirigen al servidor de demostración incluido.

Obtiene https://{domain}/.well-known/nod.json, recurriendo a https://{domain}/nod.json si es necesario. Devuelve un resumen estructurado: identidad de la empresa, capacidades declaradas, acciones admitidas (con endpoints + autenticación), endpoints de API y métodos de contacto. Devuelve un mensaje claro de "no se encontró el manifiesto" en caso de error.

check_capability

Entrada

Tipo

Descripción

domain

string

Solo el dominio.

action

string

Valores comunes: order_food, place_order, view_menu, book_table, book_appointment, search_products, find_provider, get_pricing, check_inventory, check_status, create_account, get_docs, contact_support.

Obtiene el manifiesto y verifica la acción contra transactions.capabilities, discovery.mcp_server.capabilities, support.contact.mcp_server.capabilities y los endpoints estructurales (transactions.purchase, discovery.search, information.pricing, etc.). Devuelve un veredicto de sí/no, la URL del endpoint, el método de autenticación y las restricciones de política (límites de tasa, umbrales de confirmación humana).

Cómo funciona el enrutamiento *.localhost

Cuando el servidor MCP recibe un dominio que termina en .localhost, realiza la petición a http://localhost:3456/{domain}/nod.json en lugar de la URL estándar. Esto hace que la demostración sea autónoma: puedes apuntar a Claude a demo-restaurant.localhost y obtener resultados reales sin ninguna configuración de DNS o HTTPS.

Variables de entorno:

  • NOD_LOCAL_PORT — puerto en el que escucha el servidor de manifiestos de demostración (por defecto 3456)

  • NOD_LOCAL_MANIFEST_SERVER — URL base que utiliza el servidor MCP para las búsquedas de .localhost (por defecto http://localhost:3456)

  • NOD_FORCE_LOCAL=1 — redirige todos los dominios a través del servidor de manifiestos local (útil para colaboradores que prueban nuevos manifiestos de ejemplo)

¿Qué sigue?

Publica un nod.json para tu propia empresa utilizando la especificación del protocolo NOD en opennod.ai/protocol. Un manifiesto mínimo y válido toma unos 30 minutos en escribirse, y una vez que esté activo en https://yourdomain.com/.well-known/nod.json, cualquier agente que utilice este servidor MCP (o cualquier otro cliente compatible con NOD) podrá descubrir tu empresa y actuar según sus capacidades.

Licencia

MIT

Available Tools

2 tools
check_capabilityCheck a NOD capabilityA

Given a domain and an action (e.g. order_food, book_appointment, search_products, get_pricing, view_menu, book_table, check_status, create_account), fetches the business's NOD manifest and reports whether the action is supported, the endpoint URL, authentication requirements, and any policy constraints.

ParametersJSON Schema
NameRequiredDescriptionDefault
domainYesThe domain to check (e.g. "demo-restaurant.localhost").
actionYesThe action to check. Common values: order_food, place_order, view_menu, book_table, book_appointment, search_products, find_provider, get_pricing, check_inventory, check_status, create_account, get_docs, contact_support.

TDQS

A3.7/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full behavioral disclosure. It explains what the tool does and returns, but does not mention side effects, prerequisites (e.g., domain validity), or that it is read-only.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence covering purpose, input, and output. Very concise with no wasted words, though slightly dense; could be broken into two sentences for readability, but still effective.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema, but description adequately covers return fields (supported status, endpoint, auth, policies). Input is fully described. Missing error handling and sibling differentiation, but sufficient for the tool's simplicity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so baseline is 3. The description adds value by listing common actions, providing concrete examples that aid selection beyond the schema's generic string type.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool checks if an action is supported for a given domain, listing output details. It differentiates from the sibling 'lookup_nod' by focusing on a specific action check.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus 'lookup_nod' or when not to use it. The description only implies usage through examples, lacking explicit context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

lookup_nodLook up NOD manifestA

Fetches a business's NOD Protocol manifest from https://{domain}/.well-known/nod.json (or the local demo server for *.localhost domains) and returns a structured summary: business identity, declared capabilities, supported actions, API endpoints, and contact methods.

ParametersJSON Schema
NameRequiredDescriptionDefault
domainYesThe domain to look up (e.g. "example.com" or "demo-restaurant.localhost"). Do not include scheme or path.

TDQS

A3.7/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must carry full behavioral transparency. It discloses the fetch action and return summary but does not address potential failure modes (e.g., domain not found, malformed manifest), rate limits, or authentication requirements. The description is adequate but incomplete for a safe agent invocation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence that efficiently conveys the main purpose and key details (URL pattern, return contents). It is front-loaded and includes relevant information without excess words. However, it is somewhat dense and could be split into two sentences for improved readability.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the low complexity (single parameter, no output schema), the description provides sufficient context: it specifies the source URL, the domain format, and the contents of the returned summary. It does not cover error handling or exact output structure, but for a simple lookup tool it is reasonably complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% description coverage for the single 'domain' parameter. The description adds context about the URL pattern but reiterates the format constraint already present in the schema. Since schema coverage is high, the baseline of 3 is appropriate; the description does not significantly add meaning beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it fetches a NOD Protocol manifest from a well-known URL and returns a structured summary including business identity, capabilities, actions, endpoints, and contact methods. It uses a specific verb-resource combination and distinguishes itself from the sibling tool 'check_capability' by focusing on the full manifest.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains what the tool does but provides no guidance on when to use it versus the sibling 'check_capability', nor does it mention prerequisites or exclusions. The usage context is implied (looking up a domain's manifest) but lacks explicit alternative differentiation.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 2 tool updatesv0.1.0
    • First observedcheck_capability
    • First observedlookup_nod
Deploy Server
One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

TDQS

A3.9/5.0

Scored across 2 tools

Disambiguation5/5

The two tools have clearly distinct purposes: check_capability validates a specific action against a business's manifest, while lookup_nod retrieves and summarizes the entire manifest. There is no overlap or ambiguity between them, as one is for targeted validation and the other for general information retrieval.

Naming Consistency5/5

Both tools follow a consistent verb_noun pattern with snake_case naming: check_capability and lookup_nod. The verbs 'check' and 'lookup' are semantically appropriate and distinct, and the naming style is uniform throughout the set.

Tool Count2/5

With only two tools, the server feels under-scoped for its apparent purpose of interacting with NOD Protocol manifests. While the tools cover basic retrieval and validation, the lack of tools for actions like updating manifests, managing policies, or executing supported actions suggests a thin surface that may limit agent functionality.

Completeness2/5

The tool set is significantly incomplete for the NOD Protocol domain. It provides read-only access to manifests but lacks tools for creating, updating, or deleting manifests, or for actually executing the supported actions (e.g., order_food, book_appointment). This creates dead ends where agents can inspect but not interact with the business capabilities.

Maintenance

ActivityInactive
ResponsivenessNo issues

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