// SCAN REPORT

Hopper MCP Server

7 tools. 3 can modify or destroy data without limits.

2 destructive tools with no built-in limits. Policy required.

Last updated: 3 Jul 2026

3 can modify or destroy data

4 read-only

7 tools total

Community server · catalogue entry verified 03/07/2026

How to control Hopper MCP Server ↓

TOOL MAP

What Hopper MCP Server exposes to your agents

Read (4) Write / Execute (1) Destructive / Financial (2)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

Critical Risk

The most dangerous Hopper MCP Server tools

Financial · Critical book_flight This tool directly commits a financial transaction by booking a flight, requiring payment information and returning a booking confirmation. Financial · Critical book_hotel This tool commits a financial transaction by initiating a hotel booking that requires payment information. Write · Medium set_price_alert set_price_alert creates a new alert record in the Hopper system, which is a Write operation - it modifies state by adding data reversibly.

3 of Hopper MCP Server's 7 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control Hopper MCP Server

PolicyLayer is an MCP gateway — it sits between your AI agents and Hopper MCP Server, and nothing reaches the server without passing your rules. These are the rules we recommend:

Block financial tools by default

{
  "book_flight": {
    "deny_if": [
      {
        "conditions": [],
        "on_deny": "Requires human approval."
      }
    ]
  }
}

Financial tools should be explicitly enabled per use case, not open by default.

Rate limit write operations

{
  "set_price_alert": {
    "limits": [
      {
        "counter": "set_price_alert_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "get_bookings": {
    "limits": [
      {
        "counter": "get_bookings_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Hopper MCP Server — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON HOPPER →

Instant setup, no code required.

FULL CATALOGUE

All 7 Hopper MCP Server tools

FINANCIAL 2 tools

Financial book_flight Initiate a flight booking on Hopper for a specific flight. Requires passenger details and payment information. Financial book_hotel Initiate a hotel booking on Hopper. Requires guest details and payment information. Hopper

WRITE 1 tools

Write set_price_alert Create a price drop alert for a flight or hotel. Hopper will notify via the app/email when prices hit your tar

READ 4 tools

Read get_bookings View current and past bookings from a Hopper account. Returns flight and hotel booking history with status, it Read get_price_forecast Get Hopper Read search_flights Search for available flights on Hopper with real-time pricing and AI-powered price predictions. Returns flight Read search_hotels Search for hotels on Hopper with price predictions. Returns hotel options with ratings, amenities, and Hopper

FAQ

Questions about Hopper MCP Server

Can an AI agent move money through the Hopper MCP Server MCP server? +

Yes. The Hopper MCP Server server exposes 2 financial tools including book_flight, book_hotel. Without a policy, an autonomous agent can call these with no spend caps, no rate limits, and no approval flow. PolicyLayer lets you block financial tools by default, require human approval, or set per-tool rate limits — enforced on every call.

How do I prevent bulk modifications through Hopper MCP Server? +

The Hopper MCP Server server has 1 write tools including set_price_alert. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Hopper MCP Server.

How many tools does the Hopper MCP Server MCP server expose? +

7 tools across 2 categories: Read, Write. 4 are read-only. 3 can modify, create, or delete data.

How do I enforce a policy on Hopper MCP Server? +

Register the Hopper MCP Server MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Hopper MCP Server tool call.

Deterministic rules across all 7 Hopper MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON HOPPER →

Instant setup, no code required.

7 Hopper MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.