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hostaway-mcp: Instructions file for Claude Code

CLAUDE.md

hostaway-mcp CLAUDE.md is an instructions file for Claude Code from prosperkartik/hostaway-mcp. It costs 2,668 tokens per session, scanned A, original, MIT.

Repository instructions for an MCP server that connects Claude or another compatible agent to Hostaway, a property-management system. They describe the project structure, technology choices, authentication, and safety rules.

In plain words
What is it for?
Use them when working on the Hostaway MCP server, especially its read-only API tools, authentication flow, documentation, and repository configuration.
Why use it?
They give an agent the project-specific context needed to change or maintain the server without breaking its setup or adding unsafe operations.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is prosperkartik/hostaway-mcp's own configuration. It tells Claude Code how to work on hostaway-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything hostaway-mcp configures →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/titan/remote-job/CLAUDE.md.

not rated 4repo 6mo ago A scan 2,668 tokens original MIT
View source ↗ prosperkartik/hostaway-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to prosperkartik/hostaway-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/prosperkartik/hostaway-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/prosperkartik/hostaway-mcp

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Per session 2,668 This file is loaded in full into every session.
When invoked 2,668 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.02668 $0.02668
Opus 5.5 $0.01067 $0.01067
Sonnet 5.5 $0.00534 $0.00534
Haiku 4.5 $0.00267 $0.00267

Measured 2mo ago against content hash 23c855e05399, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hostaway-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 196 lines

How it starts

The opening of the file, as written. The whole thing — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code when working in this repository.

@prosperkartik/hostaway-mcp — Model Context Protocol server for the Hostaway PMS

Open-source MCP server connecting Claude (and any MCP-compatible client) to the Hostaway property-management system. v0.1.0 shipped Apr 25, 2026; v0.1.1 (infra-only — Dockerfile + glama.json) Apr 26, 2026 — 10 read-only tools, on npm, MIT licensed.

Hard rules (read these first)

These rules come from explicit user instruction and are persisted in user-level memory at /Users/titan/.claude/projects/-Users-titan/memory/feedback_hostaway_mcp_safety.md. They apply to every change in this repo.

  1. Read-only operations only. v0.1 ships only GET-style tools. The user's API key has full account scope but is treated as read-only by policy. Adding any write capability requires explicit user permission first.
  2. Ask before adding any write tool (send_message, update_calendar, create_reservation, etc.). Don't ship write capability based on "the API supports it."
  3. No real account data in documentation. Never paste actual listing names, reservation IDs, guest names, addresses, prices, emails, or property internal names into README, examples, demo recordings, or commit messages. Use plausible fake examples instead. The author runs live Miami properties (Beacon South Beach, Hotel Ocean, Luxuri Suites) — exposing real ops data would be a privacy violation.
  4. Never commit credentials. .env, .env.*, .npmrc, and secrets/ are gitignored. The local .npmrc may contain a personal npm publish token — confirm with git check-ignore .npmrc before any commit.

Tech stack (locked — don't change without good reason)

  • Language: TypeScript (strict mode), Node ≥ 20
  • Module format: ESM ("type": "module" in package.json)
  • MCP SDK: @modelcontextprotocol/sdk (official Anthropic SDK)
  • Schema validation: zod@3 (note: zod 4 is out but the MCP SDK examples target zod 3 — stick with 3)
  • HTTP: native Node fetch — no axios, no node-fetch, no undici. Keeps install footprint small and supply-chain attack surface narrow.
  • Build target: ES2022, module/moduleResolution Node16, output to ./build/

Read the full file on GitHub · 196 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 196 lines · 2,668 tokens per session scan A 23c855e05399

Subscribe to this mod's changes

hostaway-mcp CLAUDE.md is an instructions file published in the GitHub repository prosperkartik/hostaway-mcp (4 stars, last pushed 6mo ago), licensed MIT. It adds 2,668 tokens to every session, about $0.0107 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

anthropicclaudehostawaymcpopenaipms
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