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Linnworks MCP by usefulapi
io.usefulapi/linnworks in the official MCP registry.
Endpoint https://linnworks.usefulapi.io/mcp. Source: github.com/m190/usefulapi-mcp.
The registry describes it as: Read Linnworks inventory, stock and orders; set stock levels and add order notes.
We read its 17 tools on 2026-10-26. 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
linnworks_list_stock_locations linnworks_search_inventory linnworks_get_inventory_item linnworks_get_stock_levels linnworks_get_stock_history linnworks_list_categories linnworks_list_suppliers linnworks_list_open_orders linnworks_get_open_orders_details linnworks_get_order linnworks_find_order_by_number linnworks_find_orders_by_reference linnworks_search_processed_orders linnworks_get_order_notes linnworks_list_postal_services linnworks_set_stock_level linnworks_add_order_note
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-usefulapi-linnworks)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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