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Postlyra
io.github.prof-1t/postlyra-mcp in the official MCP registry.
Endpoint https://postlyra.app/mcp. Source: github.com/prof-1t/postlyra-mcp.
The registry describes it as: Manage Telegram drafts, media, schedules and publications from AI clients.
We read its 41 tools on 2026-10-21. 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
get_auth_status get_postlyra_guide get_formatting_capabilities list_channels list_templates search_post_drafts create_post_draft preview_post update_post_draft attach_media_to_draft publish_post list_signatures get_signature preview_signature create_signature update_signature delete_signature convert_draft_to_signature assign_signature get_workspace update_workspace search_posts get_post show_post_card update_post copy_post archive_post restore_post list_publications schedule_post reschedule_publication cancel_publication apply_post_to_publication delete_publication create_template update_template delete_template create_media_upload finalize_media_upload attach_media get_content_attention
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[](https://lazaretto.dev/mcp-registry/io-github-prof-1t-postlyra-mcp)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.