Home / MCP registry index / io.usefulapi/wubook

WuBook MCP by usefulapi

io.usefulapi/wubook in the official MCP registry. Endpoint https://wubook.usefulapi.io/mcp. Source: github.com/m190/usefulapi-mcp.

The registry describes it as: Read WuBook ZaK rooms, availability and reservations; manage inventory and guest check-in.

We read its 19 tools on 2026-10-31. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.

A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.

Connect it

The endpoint answers MCP over HTTP; that is how we read it. Add it to your client:

Claude Code

claude mcp add --transport http wubook https://wubook.usefulapi.io/mcp

Cursor: ~/.cursor/mcp.json

{
  "mcpServers": {
    "wubook": {
      "url": "https://wubook.usefulapi.io/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"wubook","type":"http","url":"https://wubook.usefulapi.io/mcp"}'

Some servers ask you to sign in the first time a client connects, or want a key from the people who run them; the server's own docs say which.

Let Claude Code check servers as it adds them

With the free lazaretto-guard plugin installed, when Claude Code adds a server for you or writes one into an MCP config, the plugin reads the server's tools first and asks you if one of our rules matches. Install it, restart Claude Code, then ask it to run the command above.

Install lazaretto-guard

claude plugin marketplace add jamesdfinance-dev/lazaretto-plugins
claude plugin install lazaretto-guard@lazaretto-plugins

Tools it advertises

wubook_list_rooms wubook_list_room_types wubook_list_rates wubook_list_products wubook_list_meal_boards wubook_list_extras wubook_get_inventory_symbols wubook_get_room_availability wubook_get_rate_values wubook_update_inventory wubook_get_reservation wubook_list_reservations wubook_list_todays_reservations wubook_create_reservation wubook_check_in wubook_check_out wubook_undo_check_in wubook_undo_check_out wubook_get_customer

Tool changes

We compare every full read of this server with the one before. No change in what its tools say has been seen since we started keeping this record on 2026-10-30.

Fingerprint of its tools at our last full read (2026-10-31): 40f22a94ba96c964. A client can hash the tools it is served the same way and compare; the full value and a hash per tool are in this page as JSON.

Run this server? Show the check in your README

The badge reflects the latest weekly read:

Markdown

[![MCP tool check](https://lazaretto.dev/mcp-registry/io-usefulapi-wubook/badge.svg)](https://lazaretto.dev/mcp-registry/io-usefulapi-wubook)

How this was checked

Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.

To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.