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BeliefState
ai.beliefstate/investor-research in the official MCP registry.
Endpoint https://beliefstate.ai/v1/research/mcp.
The registry describes it as: Stock research and investor research for trading agents. 16 x402 tools; data from 0.02 USDC on Base.
We read its 18 tools on 2026-10-27. Nothing in them matched our tool-poisoning rules.
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_belief_risks get_belief_catalysts get_author_track_record search_beliefs get_belief compare_beliefs get_brief get_beliefs search_entities get_belief_changes get_context_assessment list_research_visuals get_research_visual get_belief_relationships evaluate_belief_scenario refresh_market_data get_tickers search_companies
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/ai-beliefstate-investor-research)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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