Rate Ranger MCP server
Watch a hotel's price after your user booked it, and email them when it drops enough to rebook.
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If you have run it, two minutes of your experience saves the next person an afternoon.
Rate Ranger tools (2, 1 write)
write = sends, deletes, buys or postscheck_hotel_bookingFreeCheck one booking you submitted, using the read token returned at submission. Use it to find out whether the traveller has confirmed yet: `confirmed` is false until they click the emailed link, and while it is false nothing is being monitored. Check here before telling your user their booking is being tracked.
submit_hotel_bookingwrite actionFreeEnrol a hotel booking the traveller has ALREADY made into free price monitoring. Rate Ranger watches what the hotel charges for the same dates and emails them if it drops far enough to be worth rebooking. IMPORTANT: this monitors nothing on its own. The traveller is emailed one confirmation link, and no price is checked until they click it. Tell your user to expect that email. Do not tell them the booking is being tracked until check_hotel_booking says it is. Unconfirmed bookings are deleted after 7 days. Use this only for a booking that already exists. It does not search for or make reservations.
Public scan report
scanner v0.1.9 · 2026-09-20 · same rubric, same numbers if you re-run it
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 696ms20/20
- Tool poisoning2 tool descriptions checked15/15
- Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
- Maintenancelast push 17 days ago15/15
- Maintainer identitynamespace and repository owner differ; GitHub account older than a year; website matches verified namespace7/10
Findings (1)
- highWrite-action tools reachable without authentication
auth.open-write
Install directly
claude mcp add --transport http hotel-price-monitor https://www.rateranger.io/api/mcp
Rate Ranger: common questions
- Is Rate Ranger MCP server safe?
- Mostly: it is graded B (80/100). Read the Rate Ranger safety report
- How do I install Rate Ranger?
- It runs remotely at www.rateranger.io. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does Rate Ranger need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is Rate Ranger maintained?
- The last commit was 18 days ago (2026-09-03). The latest release is v1.0.0.
- Is Rate Ranger up?
- 100% of our last 7 checks got an answer. We check remote servers about four times a day.
- What can I use instead of Rate Ranger?
- Servers from other publishers that do the same job: Palisade MCP server, Engagelab Email MCP server and emailmd MCP server. Compare all Rate Ranger alternatives.
Alternatives to Rate Ranger
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