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WhatConverts MCP by usefulapi
io.usefulapi/whatconverts in the official MCP registry.
Endpoint https://whatconverts.usefulapi.io/mcp. Source: github.com/m190/usefulapi-mcp.
The registry describes it as: Read WhatConverts leads, calls, forms, accounts and profiles; add leads and update lead value.
We read its 15 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
whatconverts_list_leads whatconverts_get_lead whatconverts_get_call_recording_info whatconverts_update_lead whatconverts_create_lead whatconverts_list_accounts whatconverts_get_account whatconverts_list_profiles whatconverts_get_profile whatconverts_list_users whatconverts_get_user whatconverts_list_roles whatconverts_get_role whatconverts_list_phone_numbers whatconverts_list_web_forms
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The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-usefulapi-whatconverts)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.