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Cerveja Barata

by cervejabarata.com.br · remote · no sign-in to list tools · v0.2.1 · published by br.com.cervejabarata

Beer prices in Brazilian bars ranked by price per litre: search, cheapest now, bars, price index

Changes · 4
CompareRegistry entry

7 tools: 4 change things and 3 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http cervejabarata https://cervejabarata.com.br/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnprice_per_litre

    The server marks "price_per_litre" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The description's first verb is "convert": a word for a change.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Changes things 4Claude Code: ask
  • catalogThe cities covered (with how many prices each has), the beer brands and the serving formats: the slugs the other tools take.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    The cities covered (with how many prices each has), the beer brands and the serving formats: the slugs the other tools take.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • cheapest_nowThe cheapest beer prices on right now in the city's time zone, happy hours and timed promos included.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    The cheapest beer prices on right now in the city's time zone, happy hours and timed promos included. Give lat and lng to keep bars within radius_m of a point (distance in metres comes back with each price).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • price_indexThe monthly Índice Cerveja Barata for a city: median, quartiles and minimum price per litre, for the whole city and by format, bairro and brand, with how many prices and bars each …No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    The monthly Índice Cerveja Barata for a city: median, quartiles and minimum price per litre, for the whole city and by format, bairro and brand, with how many prices and bars each cell rests on. Latest month by default; final once the month is closed.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • price_per_litreConvert a Brazilian beer price into reais per litre, the unit Cerveja Barata ranks by.1 finding

    Why it is in this group

    • The description's first verb is "convert": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "price_per_litre" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The description's first verb is "convert": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Convert a Brazilian beer price into reais per litre, the unit Cerveja Barata ranks by. Give the price paid in BRL, the volume of one unit in ml and how many units the price buys (e.g. 5 for a bucket of 5 long necks).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
Only reads 3Claude Code: allow
  • get_venueA bar's details (kind, bairro, address, location, Instagram, opening hours, attributes) and every beer price it has, cheapest per litre first.No findings

    Why it is in this group

    • The name "get_venue" says "get": a word for reading.
    Description, as the server wrote it
    A bar's details (kind, bairro, address, location, Instagram, opening hours, attributes) and every beer price it has, cheapest per litre first. The venue slug comes from search_deals or cheapest_now URLs.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • list_neighbourhoodsThe city's bairros that have beer prices: how many bars and prices each has and its cheapest price per litre, most covered first.No findings

    Why it is in this group

    • The name "list_neighbourhoods" says "list": a word for reading.
    Description, as the server wrote it
    The city's bairros that have beer prices: how many bars and prices each has and its cheapest price per litre, most covered first. The slugs filter search_deals.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • search_dealsBeer prices in a city's bars, cheapest per litre first, each with the bar, the serving, the price, when it applies (happy hours) and when it was last checked.No findings

    Why it is in this group

    • The name "search_deals" says "search": a word for reading.
    Description, as the server wrote it
    Beer prices in a city's bars, cheapest per litre first, each with the bar, the serving, the price, when it applies (happy hours) and when it was last checked. Filter by bairro, brand, format, kind or a maximum price per litre. Open bars only come with kind=open_bar, ranked by package price.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.2.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http cervejabarata https://cervejabarata.com.br/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__cervejabarata__search_deals",
      "mcp__cervejabarata__get_venue",
      "mcp__cervejabarata__list_neighbourhoods"
    ],
    "ask": [
      "mcp__cervejabarata__price_per_litre",
      "mcp__cervejabarata__cheapest_now",
      "mcp__cervejabarata__price_index",
      "mcp__cervejabarata__catalog"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as cervejabarata. Review it before you use it.