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Evenium MCP by usefulapi

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

The registry describes it as: Read Evenium events, guests, contacts and hotels; register guests and update contacts and statuses.

Connect it

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

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

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

code --add-mcp '{"name":"evenium","type":"http","url":"https://evenium.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.

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

Tools it advertises

evenium_list_events evenium_get_event evenium_list_guests evenium_get_guest evenium_get_guest_status evenium_get_guest_post_status evenium_get_guest_accommodations evenium_list_hotels evenium_create_guest evenium_update_guest_status evenium_update_guest_post_status evenium_list_contacts evenium_get_contact evenium_get_contact_events evenium_create_contact evenium_update_contact evenium_list_event_parts evenium_get_event_part evenium_list_event_part_registrations

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): 18d73d5defc74dcf. 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:

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

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.

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