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Stay Cost Brain

com.staycostbrain/stay-cost-brainstaycostbrain.comstreamable-httpv1.0.0Scanned

Tourist and hotel taxes from official sources, worked out night by night for your dates and guests.

5 tools: 3 change things and 2 only read.

Tools: 0 delete, 0 irreversible, 3 write, 2 read.
  • Reads private data · 1
  • Reads text others write · 1
  • Can send data out · 0
  • 1 finding

Anlyon alternative

3 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →
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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

5 tools

Changes things 3Claude Code: ask
  • place_rulesEvery tourist-tax rule for one researched place: each tax with its authority, legal basis, rates by type of stay, season and area, night caps, exemptions, how it is paid, valid dat…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
    Every tourist-tax rule for one researched place: each tax with its authority, legal basis, rates by type of stay, season and area, night caps, exemptions, how it is paid, valid dates and status (verified, inferred, announced), with source links and dates.

    Annotations the server declares

    • title: Place rules
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • tourist_taxThe tourist tax for one stay, worked out night by night: each tax that applies (regional and city parts separately), the amount or the range when the star rating or type of stay is…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 tourist tax for one stay, worked out night by night: each tax that applies (regional and city parts separately), the amount or the range when the star rating or type of stay is not given, how many nights are charged, how it is paid, announced changes in force on those nights, and the official source and date for each. Accepts a researched place or any town; towns outside the researched places return researched=false. Percentage taxes need room_price_total. Residents', medical and other special exemptions are listed in `rules`, not applied.

    Annotations the server declares

    • title: Tourist tax
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 2Show 2 read-only tools
  • get_capabilitiesWhat Stay Cost Brain covers: the researched places, how the tax figures are sourced and dated, what it does not do (no room prices, no booking), and the sister services.No findings

    Why it is in this group

    • The name "get_capabilities" says "get": a word for reading.
    Description, as the server wrote it
    What Stay Cost Brain covers: the researched places, how the tax figures are sourced and dated, what it does not do (no room prices, no booking), and the sister services.

    Annotations the server declares

    • title: Get capabilities
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_placesEvery place with a researched tourist-tax table: name, country, today's headline rate, the date it was checked, the next re-check date, the towns that set their own tax, and the pa…Reads private dataNo findings

    Why it is in this group

    • The name "list_places" says "list": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "table": it reads databases.
    Description, as the server wrote it
    Every place with a researched tourist-tax table: name, country, today's headline rate, the date it was checked, the next re-check date, the towns that set their own tax, and the page with every rate and source.

    Annotations the server declares

    • title: List places
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • 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.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged outbound.

Reads private data1
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnhotels_link

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

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "hotels_link" says "link": a word for a change.

    What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http stay-cost-brain https://staycostbrain.com/mcp
claude mcp add --transport http stay-cost-brain https://staycostbrain.com/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__stay-cost-brain__get_capabilities",
      "mcp__stay-cost-brain__list_places"
    ],
    "ask": [
      "mcp__stay-cost-brain__tourist_tax",
      "mcp__stay-cost-brain__place_rules",
      "mcp__stay-cost-brain__hotels_link"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as stay-cost-brain. Review it before you use it.

Capability tags behind 2 rules
  • mcp__stay-cost-brain__list_places private-data
  • mcp__stay-cost-brain__hotels_link untrusted-input

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.staycostbrain/stay-cost-brain/verify?hash=2fe5aa1744581a815b662aa8f61196ebf94183c924c36dbef7151e82f733de39" | jq -e '.changed == false'

Pinned hash 2fe5aa174458, from Oct 29, 2026, 11:17 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.staycostbrain/stay-cost-brain/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

anlyon.dev badge for com.staycostbrain/stay-cost-brain
[![anlyon.dev](https://anlyon.dev/badge/com.staycostbrain/stay-cost-brain.svg)](https://anlyon.dev/servers/com.staycostbrain/stay-cost-brain)

Source: MCP Registry · repository. Synced Oct 29, 2026, 12:17 UTC.