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NestingCalc Calculators
com.nestingcalc/calculators in the official MCP registry.
Endpoint https://mcp.nestingcalc.com/mcp.
The registry describes it as: 37 cutting and woodworking calculators: cut lists, sheet nesting, timber volume, kiln drying
We read its 37 tools on 2026-10-28. 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
linear_cutting_optimizer sheet_cutting_optimizer board_feet_calculator miter_angle_calculator lumber_weight_calculator rebar_takeoff metal_weight_calculator cnc_feeds_speeds sheet_metal_gauge tile_calculator wallpaper_calculator baluster_spacing_calculator flooring_calculator embroidery_resize hoppus_volume log_volume jas_log_scale timber_unit_converter green_log_weight stowage_factor container_loading sawmill_recovery moisture_content wood_shrinkage wood_emc kiln_capacity rough_sizing firewood_calculator rpm_calculator cutting_speed_calculator timber_beam_capacity glass_price_calculator manufacturing_yield glue_consumption paint_coverage cbm_shipment bom_costing
Run this server? Show the check in your README
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[](https://lazaretto.dev/mcp-registry/com-nestingcalc-calculators)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.