Home / MCP registry index / io.github.9thShini/smart-tools

SmartTools

io.github.9thShini/smart-tools in the official MCP registry. Endpoint https://smart-tools.xyz/mcp.

The registry describes it as: 70+ free calculators & converters as MCP tools; each result links to its source page.

We read its 74 tools on 2026-10-28. 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 Code

claude mcp add --transport http smart-tools https://smart-tools.xyz/mcp

Cursor: ~/.cursor/mcp.json

{
  "mcpServers": {
    "smart-tools": {
      "url": "https://smart-tools.xyz/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"smart-tools","type":"http","url":"https://smart-tools.xyz/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. The free lazaretto-guard plugin reads a server's tools the moment Claude Code adds it and asks you if one of our rules matches.

Tools it advertises

length_converter weight_converter temperature_converter area_converter volume_converter speed_converter pressure_converter angle_converter energy_converter data_converter time_converter loan_calculator mortgage_calculator compound_interest_calculator vat_calculator tip_calculator discount_calculator percentage_calculator salary_calculator margin_calculator unit_price_calculator fuel_cost_calculator electricity_cost_calculator bmi_calculator bmr_calculator body_fat_calculator ideal_weight_calculator due_date_calculator age_calculator date_difference_calculator hours_calculator aspect_ratio_calculator standard_deviation_calculator fraction_calculator triangle_calculator pace_calculator subnet_calculator color_converter gpa_calculator scientific_calculator height_converter base64 case_converter html_entities url_encoder slug_generator remove_duplicates text_counter text_diff lorem_ipsum number_base timestamp_converter transliteration uuid_generator hash_generator jwt_decoder cron_parser regex_tester layout_fixer wcag_contrast_checker and 14 more

Run this server? Show the check in your README

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Markdown

[![MCP tool check](https://lazaretto.dev/mcp-registry/io-github-9thshini-smart-tools/badge.svg)](https://lazaretto.dev/mcp-registry/io-github-9thshini-smart-tools)

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.