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CenuFiltrs Price Comparison

lv.cenufiltrs/cenufiltrs in the official MCP registry. Endpoint https://mcp.cenufiltrs.lv/mcp.

The registry describes it as: Compare prices across Latvian online retailers: offers, price history and wishlists.

We read its 22 tools on 2026-10-30. 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.

Connect it

The endpoint answers MCP over HTTP; that is how we read it. Add it to your client:

Claude Code

claude mcp add --transport http cenufiltrs https://mcp.cenufiltrs.lv/mcp

Cursor: ~/.cursor/mcp.json

{
  "mcpServers": {
    "cenufiltrs": {
      "url": "https://mcp.cenufiltrs.lv/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"cenufiltrs","type":"http","url":"https://mcp.cenufiltrs.lv/mcp"}'

Some servers ask you to sign in the first time a client connects, or want a key from the people who run them; the server's own docs say which.

Let Claude Code check servers as it adds them

With the free lazaretto-guard plugin installed, when Claude Code adds a server for you or writes one into an MCP config, the plugin reads the server's tools first and asks you if one of our rules matches. Install it, restart Claude Code, then ask it to run the command above.

Install lazaretto-guard

claude plugin marketplace add jamesdfinance-dev/lazaretto-plugins
claude plugin install lazaretto-guard@lazaretto-plugins

Tools it advertises

cf_search_offers cf_search_facets cf_render_search_results cf_list_offers cf_price_summary cf_price_history cf_deal_analysis cf_list_products cf_get_product cf_list_categories cf_search_categories cf_category_hierarchy cf_list_retailers cf_get_retailer cf_list_reviews cf_list_comments cf_list_wishes cf_add_wish cf_remove_wish cf_search_history cf_popular_searches cf_create_comment

Tool changes

We compare every full read of this server with the one before. No change in what its tools say has been seen since we started keeping this record on 2026-10-30.

Fingerprint of its tools at our last full read (2026-10-30): 865956e8498ba091. A client can hash the tools it is served the same way and compare; the full value and a hash per tool are in this page as JSON.

Run this server? Show the check in your README

The badge reflects the latest weekly read:

Markdown

[![MCP tool check](https://lazaretto.dev/mcp-registry/lv-cenufiltrs-cenufiltrs/badge.svg)](https://lazaretto.dev/mcp-registry/lv-cenufiltrs-cenufiltrs)

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.