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msza.ai — Polish Catholic Sermons ✝
ai.msza/polish-catholic-sermons in the official MCP registry.
Endpoint https://msza.ai/mcp.
The registry describes it as: Search public Polish Catholic sermons, transcripts, Scripture, prayers, churches and daily content.
We read its 17 tools on 2026-10-22. 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
search_msza_ai get_sermon get_daily_page list_recent_sermons list_sermons_by_date get_prayer get_person get_place get_bible_passage list_churches get_church get_transcript get_announcements get_ai_study find_sessions_by_bible_passage list_agent_skills get_agent_skill
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[](https://lazaretto.dev/mcp-registry/ai-msza-polish-catholic-sermons)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.