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Basis
com.basischarts/basis in the official MCP registry.
Endpoint https://www.basischarts.com/api/mcp.
The registry describes it as: Crypto market data, 200 indicators, order flow and a chart link. No account, no API key.
We read its 43 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
catalog_search catalog_describe crypto_quant_guide market_candles market_relationships market_dominance market_derivatives hyperliquid_whale_read indicator_compute formula_evaluate backtest_run strategy_research position_calculate trade_experience_retrieve news_recent news_detect_assets chart_state chart_set_instrument chart_set_timeframe chart_set_type chart_add_indicator chart_update_indicator chart_remove_indicator chart_toggle_indicator drawing_add fibonacci_draw drawing_freehand position_draw_on_chart position_plan_on_chart drawing_style drawing_delete screener_run daytrade_opportunity_scan screener_backtest calendar_upcoming orderflow_read news_history calendar_history chart_link chart_image alert_link analysis_prepare founders_preview
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/com-basischarts-basis)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.