Stay Cost Brain

npx add-mcp 'https://staycostbrain.com/mcp'

Use Stay Cost Brain in ChatGPT and Claude

Ask an assistant what tax a stay adds and get the answer from the authorities' own pages, dated, for 71 places in 18 countries (27 in the US). Free, read-only, no account.

Connect

Claude (web, desktop, mobile): find Stay Cost Brain in the connectors directory and connect it, or add a custom connector with the URL below.

Claude Code: claude mcp add --transport http stay-cost-brain https://staycostbrain.com/mcp, or install the plugin: /plugin marketplace add jimiwalters-cmyk/stay-cost-brain-mcp.

ChatGPT: Plugins → Add → Add custom MCP server, with the URL below and no authentication.

Any MCP client (streamable HTTP, no sign-in):

https://staycostbrain.com/mcp

Other assistants

Anything that can add a remote MCP server can use it: the address above, transport Streamable HTTP, no authentication. Menu names move around, so look for "Connectors" or "MCP" in settings.

• Cursor: with Cursor installed, one click adds it: Add to Cursor If Cursor opens without an install prompt: Customize → MCPs → New MCP Server, and add "stay-cost-brain": {"url": "https://staycostbrain.com/mcp"} inside "mcpServers".
• Grok: grok.com/connectors → New Connector → Custom, paste the address above; Grok finds the tools itself.
• Perplexity (Pro, Max or Enterprise): Settings → Connectors, add a custom remote connector with the address above and no authentication.
• Mistral Le Chat: in Connectors, add a custom MCP connector with the address above (the free plan too).
• Gemini Enterprise: a workspace admin adds it as a custom MCP server (Streamable HTTP, no authentication).
• Cline, VS Code, Windsurf and other MCP clients: add a server named stay-cost-brain with "url": "https://staycostbrain.com/mcp" in the client's MCP settings.

If your assistant can't add servers, ask it anyway: every place page and llms-full.txt are open for it to read and cite.

What the tools answer

Tool	What it answers
tourist_tax	The tax for one stay, night by night: each tax separately, the amount or range, nights charged, how it's paid, announced changes, source and date.
place_rules	Every rule for one place: rates by type of stay, seasons, caps, exemptions and sources.
list_places	Every researched place with today's headline rate and the date it was checked.
hotels_link	A link to live hotel prices for the dates and guests, where the person books.
get_capabilities	What is covered, how figures are sourced and what the tools don't do.

Towns we haven't researched come back as not researched, with no figure.

The same answers as JSON

https://staycostbrain.com/api/v1/tourist_tax?place=Barcelona&check_in=2026-11-20&nights=3&adults=2&type_of_stay=hotel_4

Every rate in one file: llms-full.txt · summary: llms.txt · discovery: /.well-known/mcp.json

Citing us

Link the place's page: it has every rate, the official source and the date we checked it. Say the figure is the published rate, not a quote: the accommodation charges what is in force on the night. Hotel links may earn us a commission; that never changes a tax figure (how we earn).

Privacy for tool calls: privacy · questions: [email protected]