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haggl.ai
ai.haggl/haggl in the official MCP registry.
Endpoint https://www.haggl.ai/api/mcp.
The registry describes it as: Ask a merchant's haggl.ai sales agent for a personalized offer, then hand it to checkout.
We read its 12 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
haggl_list_vendors haggl_start_negotiation haggl_search_catalog haggl_get_negotiation haggl_submit_offer haggl_accept_offer haggl_search_discounts haggl_create_haggl_id haggl_request_haggl_id_confirmation haggl_get_my_offers haggl_get_bids haggl_delete_haggl_id
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The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/ai-haggl-haggl)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.