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FalaZuki Finance BR
com.falazuki/finance-br in the official MCP registry.
Endpoint https://mcp.falazuki.com/mcp.
The registry describes it as: Cálculos e regras financeiras do Brasil com fonte e vigência em cada resposta.
We read its 117 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
calculate_car_ownership_cost calculate_fgts calculate_thirteenth_salary calculate_financing calculate_severance calculate_vacation_pay calculate_rent_vs_buy calculate_rent_adjustment calculate_financial_independence calculate_consorcio calculate_dividend_yield calculate_dividend_income_goal calculate_credit_card_interest calculate_simples_nacional calculate_unemployment_insurance calculate_retirement calculate_simple_interest calculate_discount calculate_energy_consumption calculate_fator_r compare_fuel calculate_payroll_loan calculate_optimal_prolabore compare_pgbl_vgbl calculate_pj_invoice calculate_savings_return calculate_real_salary calculate_mei_tax calculate_inflation_adjustment compare_with_cdb calculate_come_cotas calculate_cdi_yield calculate_tesouro_selic calculate_tesouro_prefixado calculate_ipca_plus calculate_lci_lca calculate_iof_resgate calculate_first_million calculate_net_worth_benchmark calculate_life_insurance_need calculate_markup compare_clt_vs_pj calculate_compound_interest calculate_investment_return calculate_emergency_fund calculate_net_salary calculate_darf convert_currency calculate_average_price calculate_import_tax calculate_debt_payoff calculate_budget calculate_employee_cost simulate_income_tax check_irpf_obligation compare_loans calculate_overtime calculate_adicional_noturno calculate_acordo_divida calculate_antecipacao_fgts and 57 more
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/com-falazuki-finance-br)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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