Fantasize MCP server

• Registry namenet.fantasize/cruise-finderverified in the MCP registry

The registry name sits under fantasize.net. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-19
• Tools10
• Server calls itselffantasize
• Server version1.0.0
• Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 13 ms.

• Whether its tools do the product's job has not been judged yet.
• Checked on 3 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
• Answeredmeasuring3 of the 7 daily checks it takes to print a share
• Median first answer38 ms
• Space in an agent's context≈ 2,990 tokensthe definitions of all its tools (10), which an agent carries on every turn
• Tool definitionsA · 92 of 100
• Typed results0 of 10 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 5 of 10

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• search_cruises

  Accepts the request in plain words (q) or as fields. Searches every sailing Fantasize tracks (23 cruise lines, ~30,000 sailings, priced every night) by region, dates, departure port, ports visited, line, length, cabin and budget. Returns…

• get_cruise

  Everything about one sailing: day-by-day itinerary, current price of each cabin grade with the date it was read (and which have no price listed),each grade against its usual price, the fare's own price history, the same itinerary on other…

• compare_cruise_lines

  Side-by-side cruise lines for the same kind of cruise (a region, departure port or port visited, plus dates): each line's number of sailings, ships, median and lowest price per person per night in one cabin grade, and its cheapest sailing…

• last_minute_cruise_deals

  Today's report of balcony and suite cabins on cruises leaving North American ports within about 21 days, each measured against the book-ahead price for the same ship, grade and length (rebuilt every morning). Filter by departure port or…

• fare_index

  Fantasize's Cruise Fare Index: how the price of the same cruises moves night to night, from our own nightly pricing of every sailing (each sailing compared only with its own earlier price, so new sailings and sell-outs never move it)…

• cruise_options

  The regions, cruise lines (with tier), departure ports and months on sale, each with its count of sailings. These are the values the search filters accept.

• report_problem

  Report a problem you found while using these tools: a price that does not match the booking page (wrong_price), a sailing that cannot be bought (not_for_sale), a wrong route or ports (wrong_itinerary), a book_url that does not open the…

• request_trip_help

  Sends one email to the person's own address. Their click in that email confirms the request; only then does it reach a Fantasize cruise specialist, who replies to them by email to help plan and book the trip. Free; no account is created…

• check_price

  Judge a price someone was quoted or already paid for one sailing: whether it is low, typical or high against that sailing's usual price for the cabin, today's listed fare beside it, the lowest fare read in 120 days, a plain one-paragraph…

• port_guide

  Fantasize's ranked guide to one cruise port: the most extraordinary things to do, the operator who runs each, the verified seller and price where we have one, a booking page for each, and how many sailings call there.