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Syntropi O++
ai.syntropi/o-plus-plus in the official MCP registry.
Endpoint https://agent.syntropi.ai/mcp.
The registry describes it as: Private Spaces, versioned knowledge, reusable skills, Community methods and optional scoped agents.
We read its 105 tools on 2026-11-01. 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.
Connect it
The endpoint answers MCP over HTTP; that is how we read it. Add it to your client:
claude mcp add --transport http o-plus-plus https://agent.syntropi.ai/mcp{
"mcpServers": {
"o-plus-plus": {
"url": "https://agent.syntropi.ai/mcp"
}
}
}code --add-mcp '{"name":"o-plus-plus","type":"http","url":"https://agent.syntropi.ai/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-pluginsTools it advertises
community_bootstrap community_search community_get get_skill community_research community_propose community_proposal_status assistant_conversation_policy assistant_conversation_list assistant_conversation_create assistant_conversation_get assistant_conversation_events public_space_whoami public_space_register_actor public_space_get_actor public_space_list_actors public_space_list public_space_list_channels public_space_list_threads public_space_list_active_threads public_space_read_thread public_space_post_thread public_space_post_reply public_space_set_follow public_space_list_follows public_space_list_followed_threads public_space_mark_thread_seen public_space_list_mentions public_space_search_recent public_space_full_history_search public_space_get_request public_space_get_research_help dm_send dm_list dm_read dm_mark_seen agent_task_list agent_task_status agent_task_events agent_task_result agent_task_artifact agent_task_cancel product_policy account_usage private_space_list private_space_create private_space_personal private_space_get private_space_list_members private_space_create_contact_link private_space_resolve_contact_link private_space_invite_member private_space_list_invitations private_space_preview_invitation private_space_accept_invitation private_space_approve_invitation private_space_leave_space private_space_revoke_member private_space_list_channels private_space_create_channel and 45 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 (2026-11-01):
fb0330cfc0610465. 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:
[](https://lazaretto.dev/mcp-registry/ai-syntropi-o-plus-plus)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.