Home / MCP registry index / io.github.ZacharyVorsteg/provenplaza-agent-mcp
Proven Plaza Calculators & Open Data
io.github.ZacharyVorsteg/provenplaza-agent-mcp in the official MCP registry.
Endpoint https://provenplaza-agent-mcp.zvorsteg1.workers.dev/mcp. Source: github.com/ZacharyVorsteg/provenplaza-agent-mcp.
The registry describes it as: 29 free construction calculators plus Florida contractor, permit, federal award and AI-crawler data.
We read its 50 tools on 2026-10-21. 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
calc_concrete_slab calc_concrete_column calc_concrete_footing calc_paint calc_roofing calc_drywall calc_flooring_tile calc_mulch_gravel calc_voltage_drop calc_ac_btu calc_deck_board calc_fence calc_insulation_r_value calc_pool_volume calc_round_pool_volume calc_oval_pool_volume calc_solar_panel calc_board_foot calc_asphalt calc_stair_stringer calc_rafter_length calc_wall_stud calc_brick calc_concrete_block calc_paver calc_sod calc_pool_salt calc_pool_chlorine calc_generator_size calc_rebar calc_retaining_wall calc_appliance_energy_cost calc_gutter_size calc_concrete_steps calc_grout calc_attic_ventilation calc_septic_tank_size calc_pool_alkalinity calc_pool_stabilizer calc_pool_calcium_hardness ai_crawler_audit sitemap_urls fl_contractor_licenses sofl_permits federal_awards agent_readiness_score agent_ready_fix_pack offer_list offer_flagship offer_customlab
Run this server? Show the check in your README
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[](https://lazaretto.dev/mcp-registry/io-github-zacharyvorsteg-provenplaza-agent-mcp)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.