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ConfBuilder

io.seamlessevents.mcp/confbuilder in the official MCP registry. Endpoint https://mcp.seamlessevents.io/mcp.

The registry describes it as: ConfBuilder tools: events, speakers, sponsors, attendees, schedules, content, news, polls, chat.

Connect it

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

claude mcp add --transport http confbuilder https://mcp.seamlessevents.io/mcp

{
  "mcpServers": {
    "confbuilder": {
      "url": "https://mcp.seamlessevents.io/mcp"
    }
  }
}

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

request_login_code verify_login_code me list_teams find_events get_event get_event_actions get_event_modules toggle_event_module list_event_members invite_event_member update_event_member remove_event_member accept_event_invitation list_speakers get_speaker create_speaker update_speaker upload_speaker_image delete_speaker send_speaker_login_link list_sponsors get_sponsor create_sponsor delete_sponsor list_sponsor_categories update_sponsor upload_sponsor_image list_schedules get_schedule create_schedule update_schedule delete_event publish_schedule unpublish_schedule delete_schedule list_activities create_activity update_activity delete_activity set_promo_config get_promo_config list_card_presets set_form_config get_form_config get_website save_website publish_website check_website_slug list_marketing_posters create_marketing_poster update_marketing_poster delete_marketing_poster list_content upload_entity_content archive_entity_content list_news create_news list_polls create_poll and 18 more

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 (2026-10-30): 1ad9a2922bdc7a59. 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-seamlessevents-mcp-confbuilder/badge.svg)](https://lazaretto.dev/mcp-registry/io-seamlessevents-mcp-confbuilder)

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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