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Sonar Connections
com.sonarconnections/sonar-connections in the official MCP registry.
Endpoint https://mcpconnector-gtlizqtvza-uw.a.run.app/public.
The registry describes it as: Source-attributed events, open data and availability
We read its 55 tools on 2026-10-28. 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.
Tools it advertises
booth_set_away biz_set_item_availability event_redeem_code event_set_intent event_find_matches event_inbox event_card_links event_card_save_linkedin booth_connect booth_enter_raffle booth_claim_swag booth_take_invite event_reply event_say_hello event_requests event_accept event_text_alerts events_list events_get events_overview events_floor_card event_wallet_pass event_pass_reissue event_pass_revoke events_personal_card event_pass_notice event_meetup_announce event_meetup_rsvp event_session_move event_session_rename event_session_cancel event_session_add event_organizer_overview site_list site_get site_edit site_publish site_undo_publish site_create event_change_detail event_change_undo event_send_request event_guest_requests event_guest_request_handled ui_card_diag events_booths events_offers events_whats_on events_speakers biz_info biz_availability biz_menu biz_order biz_order_status biz_storefront
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/com-sonarconnections-sonar-connections)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.